[Users] Final ACK getting wrong IP address

21 Jun 2006

Hey guys,

I apologize for the length of this message, but I am experiencing a
frustrating problem.
Let me first explain the situation: We have a custom video conference
app installed on two separate computers within our network. We have our
OpenSER server setup with a public address at our ISP. There is a NAT
between the clients and the OpenSER server with both clients behind the
same NAT.  Both clients have port ranges mapped through the firewall to
allow for audio and video. We were having some issues previously with
the clients unable to initiate calls between one another through the
server, however I did some work with the config file and managed to get
it working. While I was out of town, the problems came back even though
the config had not been changed. The issue that now seems to be the
problem is that the call process seems to happen properly up to the
point at which the client making the call acknowledges the ACK from the
client being called. The acknowledgement of the ACK seems to be getting
sent to the private IP address as opposed to the public address as all
the other communications seem to be. I am not entirely certain where I
have the problem, if it is with the server (easier fix) or with the
actual clients (difficult fix).

I have appended an excerpt of the packet capture (from Ethereal) from
the point at which the client programs through the complete call process
(without the unregister, since that would seem to be redundant). I have
also appended my config file. Would someone be able to look at this and
tell me where I screwed up (aside from inside my own head)?

Thanks,
Justin Pearce
Information Technology/Programming
Price Video Productions
Justin(a)PriceVideo.com
361-572-3810
800-733-3810
Fax: 361-572-3894
www.PriceVideo.com

-----------------------------------------------------

#
# $Id: openser.cfg,v 1.5 2005/10/28 19:45:33 bogdan_iancu Exp $
#
# simple quick-start config script
#

# ----------- global configuration parameters ------------------------

debug=3            # debug level (cmd line: -dddddddddd)
fork=yes 
log_stderror=yes    # (cmd line: -E)

/* Uncomment these lines to enter debugging mode 
fork=no
log_stderror=no 
*/
#-
# check_via
# Determines whether or not the server should check for a local address
# in the VIA header. Default: no or 0
#-
check_via=no

#-
# dns
# Determine if we wish to use DNS lookups on hosts. Very costly.
# Default: no or 0
#-
dns=no

#-
# rev_dns
# Determine if we wish to do Reverse DNS lookups on hosts. Very costly.
# Default: no or 0
#-
rev_dns=no

#-
# syn_branch
# This parameter determines whether OpneSER will attempt to
# statefully sync ACKs with INVITES in their appropreate transaction.
# This is slightly costly, but reliable. Default: 1
#-
syn_branch=1

#-
# port
# This paramter specifies the port which will be listened on.
# In this case we are using the standard SIP 5060
#-
port=5060

#-
# listen
# This determines the address and/or interface to be listened on. It
# can be specified by the following:
# proto:address:port (udp:192.168.16.9:5060)
# address:port (192.168.16.9:5060)
# address (192.168.16.9)
# interface (eth0)
#-    
listen=eth0

children=4

#-
# fifo: Determines the location of the FIFO file for the server
# (useful for real-time server stats)
# fifo_mode: Specifies the access mode of the FIFO (same as *NIX file
access)
#-
fifo="/tmp/openser_fifo"
fifo_mode=0666

#
# uncomment the following lines for TLS support
disable_tls = 1 
#listen = tls:eth0:5060
#tls_verify = 1
#tls_require_certificate = 0
#tls_method = TLSv1
#tls_certificate = "/usr/local/etc/openser/tls/user/user-cert.pem"
#tls_private_key = "/usr/local/etc/openser/tls/user/user-privkey.pem"
#tls_ca_list = "/usr/local/etc/openser/tls/user/user-calist.pem"

# ------------------ module loading ----------------------------------
# MySQL Module
loadmodule "/usr/local/lib/openser/modules/mysql.so"
# Stateless Replier Module
loadmodule "/usr/local/lib/openser/modules/sl.so"
# Statefule Transaction Module
loadmodule "/usr/local/lib/openser/modules/tm.so"
# Record Route Module
loadmodule "/usr/local/lib/openser/modules/rr.so"
# Max Forwards Module
loadmodule "/usr/local/lib/openser/modules/maxfwd.so"
# User Location Module
loadmodule "/usr/local/lib/openser/modules/usrloc.so"
# Registrar Module
loadmodule "/usr/local/lib/openser/modules/registrar.so"
# Text Operations Module
loadmodule "/usr/local/lib/openser/modules/textops.so"
# Presence Module
loadmodule "/usr/local/lib/openser/modules/pa.so"
# Accounting Module
loadmodule "/usr/local/lib/openser/modules/acc.so"
# Group Module
loadmodule "/usr/local/lib/openser/modules/group.so"
# URI_DB Module
loadmodule "/usr/local/lib/openser/modules/uri_db.so"
# NatHelper Module
loadmodule "/usr/local/lib/openser/modules/nathelper.so"
# Authentication Module
loadmodule "/usr/local/lib/openser/modules/auth.so"
# Database Authentication Module
loadmodule "/usr/local/lib/openser/modules/auth_db.so"

# ----------------- setting module-specific parameters ---------------
# -- usrloc params --
# User Location Module
# The following parameters allow for the storage of user location
# information in a database for more persistent lookups.
# It also allows for easy lookup of data by an outside program.
#---------------------------------------
modparam("usrloc", "db_mode", 2)
modparam("usrloc", "db_url", "mysql://openser:<password
deleted>@localhost/openser")
modparam("usrloc", "received_column", "received")
#---------------------------------------

# -- auth params --
# Authentication Module
# The following parameters allow for the persistent storage of user
# credentials in a database for authentication and authorization
# of users at the server level. This allows for more granular control
# over user accounts and their access privledges.
#---------------------------------------
modparam("auth_db", "db_url", "mysql://openser:<password
deleted>@localhost/openser")
modparam("auth_db", "calculate_ha1", 0)
modparam("auth_db", "use_domain", 0)
modparam("auth_db", "user_column", "username")
modparam("auth_db", "domain_column", "domain")
modparam("auth_db", "password_column", "ha1")
modparam("auth_db", "password_column_2", "ha1b")
#---------------------------------------

# -- rr params --
# Record Route Module
# This parameter adds value to ;lr param to make some broken UAs happy
#---------------------------------------
modparam("rr", "enable_full_lr", 1)
#---------------------------------------

# -- acc params --
# Accounting Module
# The following parameters allow for the logging of messages that pass
# through the server for the purpose of doing call accounting and
tracking.
#---------------------------------------
modparam("acc", "log_level", 4)
modparam("acc", "log_flag", 3)
modparam("acc", "log_missed_flag", 4)
modparam("acc", "db_flag", 1 )
modparam("acc", "db_missed_flag", 2)
modparam("acc", "early_media", 1)
modparam("acc", "report_ack", 1)
modparam("acc", "report_cancels", 1)
modparam("acc", "db_url", "mysql://openser:<password
deleted>@localhost/openser")
#---------------------------------------

# -- pa params --
# Presence Module
# These parameters allow for the function of the unstable presence
module.
#---------------------------------------
modparam("pa", "default_expires", 60) 
modparam("pa", "db_url", "mysql://openser:<password
deleted>@localhost/openser")
#---------------------------------------

# -- group params --
# Groups Module
# This parameter allows for lookups of user groups from a database.
# It is currently used with authentication for user access control.
#---------------------------------------
modparam("group", "db_url", "mysql://openser:<password
deleted>@localhost/openser")
#---------------------------------------

# -- uri_db params --
# URI_DB Module
# This allows for the lookup and storage of URIs in a database.
#---------------------------------------
modparam("uri_db", "db_url", "mysql://openser:<password
deleted>@localhost/openser")
#---------------------------------------

# --nathelper params --
# NatHelper Module
# The folowing paramters allow for the use of the nathelper module to
aid
# client programs in the traversal of NATs
#---------------------------------------
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "rtpproxy_disable", 1)
modparam("nathelper", "received_avp", 42)
#---------------------------------------

# -- registrar params --
# Registrar Module
# The following paramters aid the registrar in interfacing with the
nathelper
# to aid client programs in the traversal of NATs
#---------------------------------------
modparam("registrar", "nat_flag", 6)
modparam("registrar", "sip_natping_flag", 7)
modparam("registrar", "received_avp", 42)
modparam("registrar", "received_param", "received")
#---------------------------------------

# -------------------------  request routing logic -------------------

# Main Routing Logic
# Past this point is the routing logic used by the server to route all
# SIP packets from their source to their intended destination. Changes
# to this logic affect the manner in which packets are handled.
#---------------------------------------

route{

	# Label all transactions for accounting, as per the
	# parameters for the Accounting Module
	setflag(1);
	setflag(2);
	setflag(3);
	setflag(4);

	# initial sanity checks -- messages with
	# max_forwards==0, or excessively long requests
	if (!mf_process_maxfwd_header("10")) {
		sl_send_reply("483","Too Many Hops");
		exit;
	};

	#If the message is too big for SIP
	if (msg:len >=  2048 ) {
		sl_send_reply("513", "Message too big");
		exit;
	};

	# We record-route all messages -- to make sure that
	# subsequent messages will go through our proxy; that's
	# particularly good if upstream and downstream entities
	# use different transport protocol
	if (!method=="REGISTER"){
                 record_route();
        };

	# Subsequent messages withing a dialog should take the
	# path determined by record-routing
	if (loose_route()) {
		# mark routing logic in request
		append_hf("P-hint: rr-enforced\r\n"); 
		route(1);
	};

	if (!uri==myself) {
		# mark routing logic in request
		append_hf("P-hint: outbound\r\n"); 
		# if you have some interdomain connections via TLS
		#if(uri=~&quot;(a)tls_domain1.net&quot;) {
		#	t_relay_to_tls("IP_domain1","port_domain1");
		#	exit;
		#} else if(uri=~&quot;(a)tls_domain2.net&quot;) {
		#	t_relay_to_tls("IP_domain2","port_domain2");
		#	exit;
		#}
		route(1);
	};

	# if the request is for other domain use UsrLoc
	# (in case, it does not work, use the following command
	# with proper names and addresses in it)
	if (uri==myself) {

		if (method=="REGISTER") {
		# Uncomment this if you want to use digest
authentication
		        if(!is_user_in("From", "active"))
			  {
			     # If the user is not in the "active" group,
			     # reply to the user and exit the call
process.
                             force_rport();
			     sl_send_reply("403", "Forbidden - The user
account has been deactivated.");
			     exit;
			  };
			if (!www_authorize("tucan", "subscriber")) {
                             force_rport();
			     www_challenge("tucan", "1");
			     exit;
			};
                       fix_nated_register(); # Fix REGISTERs broken by
NAT
		       fix_nated_contact();
		       force_rport(); # Force the return port in the
firewall
		       add_rcv_param(); # Add the "recieved" parameter
to the location
                       save("location"); # Save the location in the
registrar
                       acc_db_request("200", "acc"); # Log the 200 OK
                       exit;
		};

		lookup("aliases"); # Check the ALIASES table
		if (!uri==myself) {
			append_hf("P-hint: outbound alias\r\n"); 
			route(1);
		};

		# native SIP destinations are handled using our USRLOC
DB
		if (!lookup("location")) {
			# If the user cannot be found, reply to the user
			# and exit the call process
			sl_send_reply("404", "Not Found");
			exit;
		};
		append_hf("P-hint: usrloc applied\r\n"); 
	}else{

	# if the request is for other domain use UsrLoc
	# (in case, it does not work, use the following command
	# with proper names and addresses in it)

		if (method=="REGISTER") {
		#Uncomment this if you want to use digest authentication
			if(!is_user_in("From", "active"))
                          {
			     # If the user is not in the "active" group,
		             # reply to the user and exit call process.
                             force_rport();
                             sl_send_reply("403", "Forbidden - The user
account has been deactivated.");
                             exit;
                          };
			if (!www_authorize("tucan", "subscriber")) {
                            force_rport();
			    www_challenge("tucan", "1");
			    exit;  
			};
                        fix_nated_register(); # Fix the REGISTERs broken
bt NAT
			fix_nated_contact();
                        force_rport(); # Force the return port in the
firewall
			add_rcv_param(); # Add the "recieved' parameter
to the location
                        save("location"); # Save the location in the
registrar
			acc_db_request("200", "acc"); # Log the 200 OK
			exit;  
		};

		# native SIP destinations are handled using our USRLOC
DB
		if (!lookup("location")) {
			# If the user cannot be found, notify sender and
exit.
			sl_send_reply("404", "Not Found");
		        exit;	
		};
	};

	# Continue onto route #1 below...
	route(1);
}

route[1] {

	if(method=="INVITE"){
          record_route();
        };

	# send it out now; use stateful forwarding as it works reliably
	# even for UDP2TCP
	if (!t_relay()) {
		# If the stateful relay of a message cannot take place,
		# reply to the sender statelessly with the error.
		sl_reply_error();
	};
	exit;
}

----------------------------------------------

No.     Time        Source                Destination           Protocol
Info
      1 0.000000    [public ip here]         [server ip here]
SIP/SDP  Request: INVITE sip:admin@[server ip here], with session
description

Frame 1 (1136 bytes on wire, 1136 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: INVITE sip:admin@[server ip here] SIP/2.0
        Method: INVITE
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 70
        From: "tucan" <sip:tucan@[public ip
here]>;tag=06c469dd756f4379a66bbc73ed316b82
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 06c469dd756f4379a66bbc73ed316b82
        To: <sip:admin@[server ip here]>
            SIP to address: sip:admin@[server ip here]
        Call-ID: 84be41be956d4be09fb1f53921941efa(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
    Message body

No.     Time        Source                Destination           Protocol
Info
      2 0.000126    [server ip here]          [public ip here]
SIP      Status: 404 Not Found

Frame 2 (572 bytes on wire, 572 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 404 Not Found
        Status-Code: 404
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=06c469dd756f4379a66bbc73ed316b82
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 06c469dd756f4379a66bbc73ed316b82
        To: <sip:admin@[server ip
here]>;tag=9a61ee6bd4b4e287efd9537354cc97a2.3058
            SIP to address: sip:admin@[server ip here]
            SIP tag: 9a61ee6bd4b4e287efd9537354cc97a2.3058
        Call-ID: 84be41be956d4be09fb1f53921941efa(a)192.168.16.50
        CSeq: 1 INVITE
        Server: OpenSer (1.0.1-tls (i386/linux))
        Content-Length: 0
        Warning: 392 [server ip here]:5060 "Noisy feedback tells:
pid=13061 req_src_ip=[public ip here] req_src_port=62630
in_uri=sip:admin@[server ip here] out_uri=sip:admin@[server ip here]
via_cnt==1"

No.     Time        Source                Destination           Protocol
Info
      3 0.064898    [public ip here]         [server ip here]
SIP      Request: ACK sip:admin@[server ip here]

Frame 3 (396 bytes on wire, 396 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: ACK sip:admin@[server ip here] SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 70
        From: "tucan" <sip:tucan@[public ip
here]>;tag=06c469dd756f4379a66bbc73ed316b82
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 06c469dd756f4379a66bbc73ed316b82
        To: <sip:admin@[server ip
here]>;tag=9a61ee6bd4b4e287efd9537354cc97a2.3058
            SIP to address: sip:admin@[server ip here]
            SIP tag: 9a61ee6bd4b4e287efd9537354cc97a2.3058
        Call-ID: 84be41be956d4be09fb1f53921941efa(a)192.168.16.50
        CSeq: 1 ACK
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
      4 2.579286    [public ip here]         [server ip here]
SIP      Request: REGISTER sip:[server ip here]

Frame 4 (534 bytes on wire, 534 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: REGISTER sip:[server ip here] SIP/2.0
        Method: REGISTER
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP 192.168.16.50:9436
        Max-Forwards: 70
        From: <sip:tucan@[server ip
here]>;tag=3a73c7106b634aebad60464c52fa6117;epid=2c72c82c29
            SIP from address: sip:tucan@[server ip here]
            SIP tag: 3a73c7106b634aebad60464c52fa6117
        To: <sip:tucan@[server ip here]>
            SIP to address: sip:tucan@[server ip here]
        Call-ID: 3da6677ead72432aa934d609637ba733(a)192.168.16.50
        CSeq: 1 REGISTER
        Contact: <sip:192.168.16.50:9436>;methods="INVITE, MESSAGE,
INFO, SUBSCRIBE, OPTIONS, BYE, CANCEL, NOTIFY, ACK, REFER"
        User-Agent: RTC/1.2.4949
        Event: registration
        Allow-Events: presence
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
      5 2.579813    [server ip here]          [public ip here]
SIP      Status: 401 Unauthorized    (0 bindings)

Frame 5 (708 bytes on wire, 708 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 401 Unauthorized
        Status-Code: 401
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP 192.168.16.50:9436;rport=62630;received=[public
ip here]
        From: <sip:tucan@[server ip
here]>;tag=3a73c7106b634aebad60464c52fa6117;epid=2c72c82c29
            SIP from address: sip:tucan@[server ip here]
            SIP tag: 3a73c7106b634aebad60464c52fa6117
        To: <sip:tucan@[server ip
here]>;tag=9a61ee6bd4b4e287efd9537354cc97a2.a80d
            SIP to address: sip:tucan@[server ip here]
            SIP tag: 9a61ee6bd4b4e287efd9537354cc97a2.a80d
        Call-ID: 3da6677ead72432aa934d609637ba733(a)192.168.16.50
        CSeq: 1 REGISTER
        WWW-Authenticate: Digest realm="tucan",
nonce="44987450d34f0c6bd30858bee369ed44197c34f9", qop="auth"
        Server: OpenSer (1.0.1-tls (i386/linux))
        Content-Length: 0
        Warning: 392 [server ip here]:5060 "Noisy feedback tells:
pid=13057 req_src_ip=[public ip here] req_src_port=62630
in_uri=sip:[server ip here] out_uri=sip:[server ip here] via_cnt==1"

No.     Time        Source                Destination           Protocol
Info
      6 2.648131    [public ip here]         [server ip here]
SIP      Request: REGISTER sip:[server ip here]

Frame 6 (789 bytes on wire, 789 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: REGISTER sip:[server ip here] SIP/2.0
        Method: REGISTER
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP 192.168.16.50:9436
        Max-Forwards: 70
        From: <sip:tucan@[server ip
here]>;tag=3a73c7106b634aebad60464c52fa6117;epid=2c72c82c29
            SIP from address: sip:tucan@[server ip here]
            SIP tag: 3a73c7106b634aebad60464c52fa6117
        To: <sip:tucan@[server ip here]>
            SIP to address: sip:tucan@[server ip here]
        Call-ID: 3da6677ead72432aa934d609637ba733(a)192.168.16.50
        CSeq: 2 REGISTER
        Contact: <sip:192.168.16.50:9436>;methods="INVITE, MESSAGE,
INFO, SUBSCRIBE, OPTIONS, BYE, CANCEL, NOTIFY, ACK, REFER"
        User-Agent: RTC/1.2.4949
        Authorization: Digest username="tucan", realm="tucan",
qop=auth,
algorithm=md5, uri="sip:[server ip here]",
nonce="44987450d34f0c6bd30858bee369ed44197c34f9", nc=00000001,
cnonce="72165331663044488051404247101819", response="31eeb043a8aada9191e
        Event: registration
        Allow-Events: presence
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
      7 2.649178    [server ip here]          [public ip here]
SIP      Status: 200 OK    (1 bindings)

Frame 7 (680 bytes on wire, 680 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP 192.168.16.50:9436;rport=62630;received=[public
ip here]
        From: <sip:tucan@[server ip
here]>;tag=3a73c7106b634aebad60464c52fa6117;epid=2c72c82c29
            SIP from address: sip:tucan@[server ip here]
            SIP tag: 3a73c7106b634aebad60464c52fa6117
        To: <sip:tucan@[server ip
here]>;tag=9a61ee6bd4b4e287efd9537354cc97a2.a80d
            SIP to address: sip:tucan@[server ip here]
            SIP tag: 9a61ee6bd4b4e287efd9537354cc97a2.a80d
        Call-ID: 3da6677ead72432aa934d609637ba733(a)192.168.16.50
        CSeq: 2 REGISTER
        Contact: <sip:[public ip
here]:62630>;expires=3600;received="sip:[public ip here]:62630"
        Server: OpenSer (1.0.1-tls (i386/linux))
        Content-Length: 0
        Warning: 392 [server ip here]:5060 "Noisy feedback tells:
pid=13054 req_src_ip=[public ip here] req_src_port=62630
in_uri=sip:[server ip here] out_uri=sip:[server ip here] via_cnt==1"

No.     Time        Source                Destination           Protocol
Info
      8 12.094078   [public ip here]         [server ip here]
SIP/SDP  Request: INVITE sip:admin@[server ip here], with session
description

Frame 8 (1140 bytes on wire, 1140 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: INVITE sip:admin@[server ip here] SIP/2.0
        Method: INVITE
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62650
        Max-Forwards: 70
        From: "dheller" <sip:dheller@[public ip
here]>;tag=1c031f5aed1941828ce8b0bb85d094ad
            SIP Display info: "dheller" 
            SIP from address: sip:dheller@[public ip here]
            SIP tag: 1c031f5aed1941828ce8b0bb85d094ad
        To: <sip:admin@[server ip here]>
            SIP to address: sip:admin@[server ip here]
        Call-ID: cddec4984cee45cf96208ca44e841f3b(a)192.168.16.40
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62650>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
    Message body

No.     Time        Source                Destination           Protocol
Info
      9 12.094290   [server ip here]          [public ip here]
SIP      Status: 404 Not Found

Frame 9 (576 bytes on wire, 576 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62650 (62650)
Session Initiation Protocol
    Status-Line: SIP/2.0 404 Not Found
        Status-Code: 404
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62650
        From: "dheller" <sip:dheller@[public ip
here]>;tag=1c031f5aed1941828ce8b0bb85d094ad
            SIP Display info: "dheller" 
            SIP from address: sip:dheller@[public ip here]
            SIP tag: 1c031f5aed1941828ce8b0bb85d094ad
        To: <sip:admin@[server ip
here]>;tag=9a61ee6bd4b4e287efd9537354cc97a2.3d1d
            SIP to address: sip:admin@[server ip here]
            SIP tag: 9a61ee6bd4b4e287efd9537354cc97a2.3d1d
        Call-ID: cddec4984cee45cf96208ca44e841f3b(a)192.168.16.40
        CSeq: 1 INVITE
        Server: OpenSer (1.0.1-tls (i386/linux))
        Content-Length: 0
        Warning: 392 [server ip here]:5060 "Noisy feedback tells:
pid=13057 req_src_ip=[public ip here] req_src_port=62650
in_uri=sip:admin@[server ip here] out_uri=sip:admin@[server ip here]
via_cnt==1"

No.     Time        Source                Destination           Protocol
Info
     10 12.108542   [public ip here]         [server ip here]
SIP      Request: ACK sip:admin@[server ip here]

Frame 10 (400 bytes on wire, 400 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: ACK sip:admin@[server ip here] SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62650
        Max-Forwards: 70
        From: "dheller" <sip:dheller@[public ip
here]>;tag=1c031f5aed1941828ce8b0bb85d094ad
            SIP Display info: "dheller" 
            SIP from address: sip:dheller@[public ip here]
            SIP tag: 1c031f5aed1941828ce8b0bb85d094ad
        To: <sip:admin@[server ip
here]>;tag=9a61ee6bd4b4e287efd9537354cc97a2.3d1d
            SIP to address: sip:admin@[server ip here]
            SIP tag: 9a61ee6bd4b4e287efd9537354cc97a2.3d1d
        Call-ID: cddec4984cee45cf96208ca44e841f3b(a)192.168.16.40
        CSeq: 1 ACK
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     11 12.576634   [public ip here]         [server ip here]
SIP      Request: REGISTER sip:[server ip here]

Frame 11 (538 bytes on wire, 538 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: REGISTER sip:[server ip here] SIP/2.0
        Method: REGISTER
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP 192.168.16.40:9409
        Max-Forwards: 70
        From: <sip:dheller@[server ip
here]>;tag=4e5b2756f82a46f4b0d79fbe65b4b9b3;epid=9a2a864d1a
            SIP from address: sip:dheller@[server ip here]
            SIP tag: 4e5b2756f82a46f4b0d79fbe65b4b9b3
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: a1541c851e0343c1a02f426b08fea18b(a)192.168.16.40
        CSeq: 1 REGISTER
        Contact: <sip:192.168.16.40:9409>;methods="INVITE, MESSAGE,
INFO, SUBSCRIBE, OPTIONS, BYE, CANCEL, NOTIFY, ACK, REFER"
        User-Agent: RTC/1.2.4949
        Event: registration
        Allow-Events: presence
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     12 12.577226   [server ip here]          [public ip here]
SIP      Status: 401 Unauthorized    (0 bindings)

Frame 12 (712 bytes on wire, 712 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62650 (62650)
Session Initiation Protocol
    Status-Line: SIP/2.0 401 Unauthorized
        Status-Code: 401
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP 192.168.16.40:9409;rport=62650;received=[public
ip here]
        From: <sip:dheller@[server ip
here]>;tag=4e5b2756f82a46f4b0d79fbe65b4b9b3;epid=9a2a864d1a
            SIP from address: sip:dheller@[server ip here]
            SIP tag: 4e5b2756f82a46f4b0d79fbe65b4b9b3
        To: <sip:dheller@[server ip
here]>;tag=9a61ee6bd4b4e287efd9537354cc97a2.e360
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 9a61ee6bd4b4e287efd9537354cc97a2.e360
        Call-ID: a1541c851e0343c1a02f426b08fea18b(a)192.168.16.40
        CSeq: 1 REGISTER
        WWW-Authenticate: Digest realm="tucan",
nonce="4498745aac38af8eb2e26fd9b7002a2e952aa9b6", qop="auth"
        Server: OpenSer (1.0.1-tls (i386/linux))
        Content-Length: 0
        Warning: 392 [server ip here]:5060 "Noisy feedback tells:
pid=13054 req_src_ip=[public ip here] req_src_port=62650
in_uri=sip:[server ip here] out_uri=sip:[server ip here] via_cnt==1"

No.     Time        Source                Destination           Protocol
Info
     13 12.699751   [public ip here]         [server ip here]
SIP      Request: REGISTER sip:[server ip here]

Frame 13 (795 bytes on wire, 795 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: REGISTER sip:[server ip here] SIP/2.0
        Method: REGISTER
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP 192.168.16.40:9409
        Max-Forwards: 70
        From: <sip:dheller@[server ip
here]>;tag=4e5b2756f82a46f4b0d79fbe65b4b9b3;epid=9a2a864d1a
            SIP from address: sip:dheller@[server ip here]
            SIP tag: 4e5b2756f82a46f4b0d79fbe65b4b9b3
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: a1541c851e0343c1a02f426b08fea18b(a)192.168.16.40
        CSeq: 2 REGISTER
        Contact: <sip:192.168.16.40:9409>;methods="INVITE, MESSAGE,
INFO, SUBSCRIBE, OPTIONS, BYE, CANCEL, NOTIFY, ACK, REFER"
        User-Agent: RTC/1.2.4949
        Authorization: Digest username="dheller", realm="tucan",
qop=auth, algorithm=md5, uri="sip:[server ip here]",
nonce="4498745aac38af8eb2e26fd9b7002a2e952aa9b6", nc=00000001,
cnonce="35632750553445629356654004975943", response="852e582b04bd8525b
        Event: registration
        Allow-Events: presence
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     14 12.700823   [server ip here]          [public ip here]
SIP      Status: 200 OK    (1 bindings)

Frame 14 (833 bytes on wire, 833 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62650 (62650)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP 192.168.16.40:9409;rport=62650;received=[public
ip here]
        From: <sip:dheller@[server ip
here]>;tag=4e5b2756f82a46f4b0d79fbe65b4b9b3;epid=9a2a864d1a
            SIP from address: sip:dheller@[server ip here]
            SIP tag: 4e5b2756f82a46f4b0d79fbe65b4b9b3
        To: <sip:dheller@[server ip
here]>;tag=9a61ee6bd4b4e287efd9537354cc97a2.e360
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 9a61ee6bd4b4e287efd9537354cc97a2.e360
        Call-ID: a1541c851e0343c1a02f426b08fea18b(a)192.168.16.40
        CSeq: 2 REGISTER
        Contact:
<sip:192.168.16.40:10853>;expires=669;received="sip:[public ip
here]:61696",
<sip:192.168.16.40:15922>;expires=2101;received="sip:[public ip
here]:62650", <sip:[public ip
here]:62650>;expires=3600;received="sip:[public ip here]:62650"
        Server: OpenSer (1.0.1-tls (i386/linux))
        Content-Length: 0
        Warning: 392 [server ip here]:5060 "Noisy feedback tells:
pid=13061 req_src_ip=[public ip here] req_src_port=62650
in_uri=sip:[server ip here] out_uri=sip:[server ip here] via_cnt==1"

No.     Time        Source                Destination           Protocol
Info
     15 24.009555   [public ip here]         [server ip here]
SIP/SDP  Request: INVITE sip:dheller@[server ip here], with session
description

Frame 15 (1140 bytes on wire, 1140 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: INVITE sip:dheller@[server ip here] SIP/2.0
        Method: INVITE
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 70
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
    Message body

No.     Time        Source                Destination           Protocol
Info
     16 24.009983   [server ip here]          [public ip here]
SIP      Status: 100 trying -- your call is important to us

Frame 16 (564 bytes on wire, 564 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 100 trying -- your call is important to us
        Status-Code: 100
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Server: OpenSer (1.0.1-tls (i386/linux))
        Content-Length: 0
        Warning: 392 [server ip here]:5060 "Noisy feedback tells:
pid=13054 req_src_ip=[public ip here] req_src_port=62630
in_uri=sip:dheller@[server ip here] out_uri=sip:192.168.16.40:10853
via_cnt==1"

No.     Time        Source                Destination           Protocol
Info
     17 24.010138   [server ip here]          [public ip here]
SIP/SDP  Request: INVITE sip:192.168.16.40:10853, with session
description

Frame 17 (1302 bytes on wire, 1302 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 61696 (61696)
Session Initiation Protocol
    Request-Line: INVITE sip:192.168.16.40:10853 SIP/2.0
        Method: INVITE
        Resent Packet: False
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.0
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
        P-hint: usrloc applied
    Message body

No.     Time        Source                Destination           Protocol
Info
     18 24.010163   [server ip here]          [public ip here]
SIP/SDP  Request: INVITE sip:192.168.16.40:15922, with session
description

Frame 18 (1302 bytes on wire, 1302 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62650 (62650)
Session Initiation Protocol
    Request-Line: INVITE sip:192.168.16.40:15922 SIP/2.0
        Method: INVITE
        Resent Packet: False
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
        P-hint: usrloc applied
    Message body

No.     Time        Source                Destination           Protocol
Info
     19 24.010184   [server ip here]          [public ip here]
SIP/SDP  Request: INVITE sip:[public ip here]:62650, with session
description

Frame 19 (1302 bytes on wire, 1302 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62650 (62650)
Session Initiation Protocol
    Request-Line: INVITE sip:[public ip here]:62650 SIP/2.0
        Method: INVITE
        Resent Packet: True
        Suspected resend of frame: 18
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.2
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
        P-hint: usrloc applied
    Message body

No.     Time        Source                Destination           Protocol
Info
     20 24.150609   [public ip here]         [server ip here]
SIP      Status: 100 Trying

Frame 20 (423 bytes on wire, 423 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 100 Trying
        Status-Code: 100
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     21 24.164671   [public ip here]         [server ip here]
SIP      Status: 180 Ringing

Frame 21 (502 bytes on wire, 502 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 180 Ringing
        Status-Code: 180
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     22 24.164812   [server ip here]          [public ip here]
SIP      Status: 180 Ringing

Frame 22 (441 bytes on wire, 441 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 180 Ringing
        Status-Code: 180
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     23 24.166314   [public ip here]         [server ip here]
SIP      Status: 180 Ringing

Frame 23 (502 bytes on wire, 502 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 180 Ringing
        Status-Code: 180
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     24 24.166448   [server ip here]          [public ip here]
SIP      Status: 180 Ringing

Frame 24 (441 bytes on wire, 441 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 180 Ringing
        Status-Code: 180
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     25 24.229568   [server ip here]          [public ip here]
SIP/SDP  Request: INVITE sip:192.168.16.40:10853, with session
description

Frame 25 (1302 bytes on wire, 1302 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 61696 (61696)
Session Initiation Protocol
    Request-Line: INVITE sip:192.168.16.40:10853 SIP/2.0
        Method: INVITE
        Resent Packet: True
        Suspected resend of frame: 17
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.0
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
        P-hint: usrloc applied
    Message body

No.     Time        Source                Destination           Protocol
Info
     26 24.229594   [server ip here]          [public ip here]
SIP/SDP  Request: INVITE sip:[public ip here]:62650, with session
description

Frame 26 (1302 bytes on wire, 1302 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62650 (62650)
Session Initiation Protocol
    Request-Line: INVITE sip:[public ip here]:62650 SIP/2.0
        Method: INVITE
        Resent Packet: True
        Suspected resend of frame: 18
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.2
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
        P-hint: usrloc applied
    Message body

No.     Time        Source                Destination           Protocol
Info
     27 24.326429   [public ip here]         [server ip here]
SIP      Status: 180 Ringing

Frame 27 (502 bytes on wire, 502 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 180 Ringing
        Status-Code: 180
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     28 24.326584   [server ip here]          [public ip here]
SIP      Status: 180 Ringing

Frame 28 (441 bytes on wire, 441 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 180 Ringing
        Status-Code: 180
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     29 26.233136   [server ip here]          [public ip here]
SIP/SDP  Request: INVITE sip:192.168.16.40:10853, with session
description

Frame 29 (1302 bytes on wire, 1302 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 61696 (61696)
Session Initiation Protocol
    Request-Line: INVITE sip:192.168.16.40:10853 SIP/2.0
        Method: INVITE
        Resent Packet: True
        Suspected resend of frame: 17
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.0
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
        P-hint: usrloc applied
    Message body

No.     Time        Source                Destination           Protocol
Info
     30 26.233163   [server ip here]          [public ip here]
SIP/SDP  Request: INVITE sip:[public ip here]:62650, with session
description

Frame 30 (1302 bytes on wire, 1302 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62650 (62650)
Session Initiation Protocol
    Request-Line: INVITE sip:[public ip here]:62650 SIP/2.0
        Method: INVITE
        Resent Packet: True
        Suspected resend of frame: 18
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.2
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
        P-hint: usrloc applied
    Message body

No.     Time        Source                Destination           Protocol
Info
     31 26.622444   [public ip here]         [server ip here]
SIP      Status: 180 Ringing

Frame 31 (502 bytes on wire, 502 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 180 Ringing
        Status-Code: 180
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     32 26.622630   [server ip here]          [public ip here]
SIP      Status: 180 Ringing

Frame 32 (441 bytes on wire, 441 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 180 Ringing
        Status-Code: 180
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     33 30.240354   [server ip here]          [public ip here]
SIP/SDP  Request: INVITE sip:192.168.16.40:10853, with session
description

Frame 33 (1302 bytes on wire, 1302 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 61696 (61696)
Session Initiation Protocol
    Request-Line: INVITE sip:192.168.16.40:10853 SIP/2.0
        Method: INVITE
        Resent Packet: True
        Suspected resend of frame: 17
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.0
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
        P-hint: usrloc applied
    Message body

No.     Time        Source                Destination           Protocol
Info
     34 30.240379   [server ip here]          [public ip here]
SIP/SDP  Request: INVITE sip:[public ip here]:62650, with session
description

Frame 34 (1302 bytes on wire, 1302 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62650 (62650)
Session Initiation Protocol
    Request-Line: INVITE sip:[public ip here]:62650 SIP/2.0
        Method: INVITE
        Resent Packet: True
        Suspected resend of frame: 18
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.2
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip here]>
            SIP to address: sip:dheller@[server ip here]
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Contact: <sip:[public ip here]:62630>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 707
        P-hint: usrloc applied
    Message body

No.     Time        Source                Destination           Protocol
Info
     35 30.386377   [public ip here]         [server ip here]
SIP      Status: 180 Ringing

Frame 35 (502 bytes on wire, 502 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 180 Ringing
        Status-Code: 180
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     36 30.386530   [server ip here]          [public ip here]
SIP      Status: 180 Ringing

Frame 36 (441 bytes on wire, 441 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 180 Ringing
        Status-Code: 180
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     37 34.093569   [public ip here]         [server ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 37 (1244 bytes on wire, 1244 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     38 34.093812   [server ip here]          [public ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 38 (1183 bytes on wire, 1183 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     39 34.118980   [public ip here]         [server ip here]
SIP      Request: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on

Frame 39 (464 bytes on wire, 464 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 70
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        Route: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     40 34.119656   [server ip here]          192.168.16.40         SIP
Request: ACK sip:192.168.16.40:9409

Frame 40 (532 bytes on wire, 532 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: 192.168.16.40 (192.168.16.40)
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 9409 (9409)
Session Initiation Protocol
    Request-Line: ACK sip:192.168.16.40:9409 SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=0
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        User-Agent: RTC/1.2
        Content-Length: 0
        P-hint: rr-enforced

No.     Time        Source                Destination           Protocol
Info
     41 34.586546   [public ip here]         [server ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 41 (1244 bytes on wire, 1244 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: True
        Suspected resend of frame: 37
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     42 34.586788   [server ip here]          [public ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 42 (1183 bytes on wire, 1183 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: True
        Suspected resend of frame: 38
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     43 34.670011   [public ip here]         [server ip here]
SIP      Request: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on

Frame 43 (464 bytes on wire, 464 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 70
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        Route: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     44 34.670212   [server ip here]          192.168.16.40         SIP
Request: ACK sip:192.168.16.40:9409

Frame 44 (532 bytes on wire, 532 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: 192.168.16.40 (192.168.16.40)
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 9409 (9409)
Session Initiation Protocol
    Request-Line: ACK sip:192.168.16.40:9409 SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=0
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        User-Agent: RTC/1.2
        Content-Length: 0
        P-hint: rr-enforced

No.     Time        Source                Destination           Protocol
Info
     45 35.590952   [public ip here]         [server ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 45 (1244 bytes on wire, 1244 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: True
        Suspected resend of frame: 37
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     46 35.591101   [server ip here]          [public ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 46 (1183 bytes on wire, 1183 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: True
        Suspected resend of frame: 38
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     47 35.612137   [public ip here]         [server ip here]
SIP      Request: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on

Frame 47 (464 bytes on wire, 464 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 70
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        Route: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     48 35.612323   [server ip here]          192.168.16.40         SIP
Request: ACK sip:192.168.16.40:9409

Frame 48 (532 bytes on wire, 532 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: 192.168.16.40 (192.168.16.40)
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 9409 (9409)
Session Initiation Protocol
    Request-Line: ACK sip:192.168.16.40:9409 SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=0
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        User-Agent: RTC/1.2
        Content-Length: 0
        P-hint: rr-enforced

No.     Time        Source                Destination           Protocol
Info
     49 37.609873   [public ip here]         [server ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 49 (1244 bytes on wire, 1244 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: True
        Suspected resend of frame: 37
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     50 37.610024   [server ip here]          [public ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 50 (1183 bytes on wire, 1183 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: True
        Suspected resend of frame: 38
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     51 37.805510   [public ip here]         [server ip here]
SIP      Request: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on

Frame 51 (464 bytes on wire, 464 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 70
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        Route: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     52 37.805903   [server ip here]          192.168.16.40         SIP
Request: ACK sip:192.168.16.40:9409

Frame 52 (532 bytes on wire, 532 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: 192.168.16.40 (192.168.16.40)
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 9409 (9409)
Session Initiation Protocol
    Request-Line: ACK sip:192.168.16.40:9409 SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=0
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        User-Agent: RTC/1.2
        Content-Length: 0
        P-hint: rr-enforced

No.     Time        Source                Destination           Protocol
Info
     53 41.584640   [public ip here]         [server ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 53 (1244 bytes on wire, 1244 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: True
        Suspected resend of frame: 37
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     54 41.584780   [server ip here]          [public ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 54 (1183 bytes on wire, 1183 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: True
        Suspected resend of frame: 38
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     55 41.630352   [public ip here]         [server ip here]
SIP      Request: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on

Frame 55 (464 bytes on wire, 464 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 70
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        Route: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     56 41.630524   [server ip here]          192.168.16.40         SIP
Request: ACK sip:192.168.16.40:9409

Frame 56 (532 bytes on wire, 532 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: 192.168.16.40 (192.168.16.40)
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 9409 (9409)
Session Initiation Protocol
    Request-Line: ACK sip:192.168.16.40:9409 SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=0
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        User-Agent: RTC/1.2
        Content-Length: 0
        P-hint: rr-enforced

No.     Time        Source                Destination           Protocol
Info
     57 49.593330   [public ip here]         [server ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 57 (1244 bytes on wire, 1244 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62650 (62650), Dst Port: 5060 (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: True
        Suspected resend of frame: 37
    Message Header
        Via: SIP/2.0/UDP [server ip here];branch=z9hG4bK4bbe.c709a097.1
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     58 49.593472   [server ip here]          [public ip here]
SIP/SDP  Status: 200 OK, with session description

Frame 58 (1183 bytes on wire, 1183 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: [public ip here] ([public ip here])
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 62630 (62630)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
        Status-Code: 200
        Resent Packet: True
        Suspected resend of frame: 38
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 INVITE
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Contact: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Type: application/sdp
        Content-Length: 679
    Message body

No.     Time        Source                Destination           Protocol
Info
     59 49.969732   [public ip here]         [server ip here]
SIP      Request: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on

Frame 59 (464 bytes on wire, 464 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: ACK sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 70
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        Route: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Length: 0

No.     Time        Source                Destination           Protocol
Info
     60 49.970031   [server ip here]          192.168.16.40         SIP
Request: ACK sip:192.168.16.40:9409

Frame 60 (532 bytes on wire, 532 bytes captured)
Ethernet II, Src: 00:30:48:28:66:ad, Dst: 00:b0:8e:e6:a0:02
Internet Protocol, Src Addr: [server ip here] ([server ip here]), Dst
Addr: 192.168.16.40 (192.168.16.40)
User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 9409 (9409)
Session Initiation Protocol
    Request-Line: ACK sip:192.168.16.40:9409 SIP/2.0
        Method: ACK
        Resent Packet: False
    Message Header
        Record-Route: <sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on>
        Via: SIP/2.0/UDP [server ip here];branch=0
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 69
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 1 ACK
        User-Agent: RTC/1.2
        Content-Length: 0
        P-hint: rr-enforced

No.     Time        Source                Destination           Protocol
Info
     61 58.227421   [public ip here]         [server ip here]
SIP      Request: BYE sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on

Frame 61 (464 bytes on wire, 464 bytes captured)
Ethernet II, Src: 00:b0:8e:e6:a0:02, Dst: 00:30:48:28:66:ad
Internet Protocol, Src Addr: [public ip here] ([public ip here]), Dst
Addr: [server ip here] ([server ip here])
User Datagram Protocol, Src Port: 62630 (62630), Dst Port: 5060 (5060)
Session Initiation Protocol
    Request-Line: BYE sip:[server ip
here];ftag=528def284594483d94678a66ecf035ca;lr=on SIP/2.0
        Method: BYE
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP [public ip here]:62630
        Max-Forwards: 70
        From: "tucan" <sip:tucan@[public ip
here]>;tag=528def284594483d94678a66ecf035ca
            SIP Display info: "tucan" 
            SIP from address: sip:tucan@[public ip here]
            SIP tag: 528def284594483d94678a66ecf035ca
        To: <sip:dheller@[server ip
here]>;tag=7830b3dafe9140a6aae6b74e591eaca1
            SIP to address: sip:dheller@[server ip here]
            SIP tag: 7830b3dafe9140a6aae6b74e591eaca1
        Call-ID: d104a459394b4a8a93164cb5a6248755(a)192.168.16.50
        CSeq: 2 BYE
        Route: <sip:192.168.16.40:9409>
        User-Agent: RTC/1.2
        Content-Length: 0
---------------------------------------------------

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[Users] Final ACK getting wrong IP address