[Serusers] SER/rtpproxy as a SIP proxy on OpenBSD 3.5 - sr-users

26 Sep 2004


      I am trying to get SER and rtpproxy to run
together on my OpenBSD 3.5 firewall.  My intention is
to have SER 0.8.14 act as a SIP proxy for incoming SIP
calls that reach me by IP address or domain name.  I
also have an Asterisk PBX behind my firewall.  My
problem is that SER can't find a running RTP proxy and
I am not sure why.  I run rtpproxy without any
switches.  SER is run as a non-root user and my
ser.cfg is below:
#
# $Id: ser.cfg,v 1.12 2002/10/21 02:40:06 jiri Exp $
#
# simple quick-start config script
#
# ----------- global configuration parameters
------------------------
debug=3          # debug level (cmd line: -dddddddddd)
fork=no
log_stderror=yes	# (cmd line: -E)
check_via=no	# (cmd. line: -v)
dns=no           # (cmd. line: -r)
rev_dns=no      # (cmd. line: -R)
port=5060
children=2
fifo="/tmp/ser_fifo"
alias="my.domainname.com"
listen=204.118.177.213
#listen=192.168.3.1
# ------------------ module loading
----------------------------------
# Uncomment this if you want to use SQL database
#loadmodule "/usr/local/lib/ser/modules/mysql.so"
loadmodule "/usr/local/lib/ser/modules/sl.so"
loadmodule "/usr/local/lib/ser/modules/tm.so"
loadmodule "/usr/local/lib/ser/modules/rr.so"
loadmodule "/usr/local/lib/ser/modules/maxfwd.so"
loadmodule "/usr/local/lib/ser/modules/usrloc.so"
loadmodule "/usr/local/lib/ser/modules/registrar.so"
loadmodule "/usr/local/lib/ser/modules/nathelper.so"
loadmodule "/usr/local/lib/ser/modules/textops.so"
# Uncomment this if you want digest authentication
# mysql.so must be loaded !
#loadmodule "/usr/local/lib/ser/modules/auth.so"
# ----------------- setting module-specific parameters
---------------
# -- usrloc params --
modparam("usrloc", "db_mode",   0)
# Uncomment this if you want to use SQL database 
# for persistent storage and comment the previous line
#modparam("usrloc", "db_mode", 2)
# -- auth params --
# Uncomment if you are using auth module
#
#modparam("auth", "secret", "alsdkhglaksdhfkloiwr")
#modparam("auth", "calculate_ha1", yes)
#
# If you set "calculate_ha1" parameter to yes (which
true in this config), 
# uncomment also the following parameter)
#
#modparam("auth", "password_column", "password")
#modparam("rr", "enable_full_lr", 1)
modparam("registrar", "nat_flag", 6)
#nathelper
modparam("nathelper", "natping_interval", 30) # Ping
interval 30 s
modparam("nathelper", "ping_nated_only", 1)   # Ping
only clients behind NAT
# -------------------------  request routing logic
-------------------
# main routing logic
route{
# compulsory processing of Route header fields and
adding RR
    loose_route();
# ATA's are symmetric but don't advertise it -- force
use of rport 
    if (search("User-Agent: Cisco ATA.*")) {
    	setflag(1); # remember this is ATA
    	force_rport();
    	fix_nated_contact();
    };
/* registration (uses rewritten contacts) */
    if (method=="REGISTER") {
    	save("my.domainname.com");
    	break;
    };
if (method=="INVITE") {
    	record_route();
    	if (isflagset(1)) { # ATA ?
    		force_rtp_proxy();
    	};
    	/* set up reply processing */
    	t_on_reply("1");
    };
if (method == "INVITE" || method == "CANCEL") {
    	if (!lookup("my.domainname.com")) {
    		sl_send_reply("404", "Not Found");
    		break;
    	};
    };
/* set up reply processing and forward statefuly */
    t_relay();
}
# all incoming replies for t_onrepli-ed transactions
enter here
onreply_route[1] {
    if (status=~"2[0-9][0-9]" && search("Server: Cisco
ATA.*"))
    	fix_nated_contact();
    	force_rtp_proxy();
}
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