Dear

Thanks for your quick reply and sorry for spamming your mailbox.

I am very confused about the setup of kamailio.cfg and rtpproxy. I have an existing kamailio 4.4 - rtpproxy running and I get the config files from both and setup the new vm. Just private connection works but the idea is to have connection from outside too. I am sure there is a mismatch with public ip, natting and/or setup of the vm hosts file.

- architecture:

*- 1x virtualbox* + 1x vm with bridge mode for network (get private ip address from the router). I suppose this is the PRIVATE_IP *+ 1x desktop (windows)* hosting a sipphone here Microsip ( https://www.microsip.org/) *- 1x modem/router* from the telecom provider - bbox-3V+ from PROXIMUS + forced in DMZ host the Kamailio server PRIVATE_IP

[image: 211001 - kamailio architecture and settings.png]

- the hosts file from Kamailio + rtpproxy is ( Maybe something is wrong or missing)

/etc/hosts

127.0.0.1 localhost

127.0.1.1 sipsecure.by-systems.be sipsecure 192.168.1.19 sipsecure.by-systems.be sipsecure xxx.XXX.xxx.XXX sipsecure.by-systems.be sipsecure # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback ff02::1 ip6-allnodes ff02::2 ip6-allrouters

*/etc/kamailio/kamailio.cfg* kamailio.config

#!define PUBLIC_IP "xxx.xxx.xxx.xxx" #!define PRIVATE_IP "192.168.1.19" #!define PRIVATE_NET "192.168.1.0/24“

#!ifdef WITH_NAT

# ----- rtpproxy params -----

modparam("rtpproxy", "rtpproxy_sock", "udp:PRIVATE_IP:7722")

# ----- nathelper params -----

modparam("nathelper", "natping_interval", 30)

modparam("nathelper", "ping_nated_only", 1)

modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)

modparam("nathelper", "sipping_from", "sip:pinger@kamailio.org")

*Etc/default/rtpproxy*

PRIVATE_IP=192.168.1.19

PUBLIC_IP=xxx.xxx.xxx.xxx

rtpport_min= 10000

rtpport_max=20000

syslog=DBUG:LOG_LOCAL5

#Defaults for rtpproxy #The control socket. #CONTROL_SOCK="unix:/var/run/rtpproxy/rtpproxy.sock" #To listen on an UDP socket, uncomment this line: #CONTROL_SOCK=udp:127.0.0.1:7722 #Additional options that are passed to the daemon. EXTRA_OPTS="-l $PRIVATE_IP/$PUBLIC_IP ="-s $PRIVATE_IP:7222 -m $ rtpport_min -M $rtpport_max -d $syslog"`

- *Misconfiguring the VM*

That means do I need to use setup 1 or 2 or another

1. 2x NIC interfaces (one with private ip, second from dmz ip + NAT1:1 public ip) 2. 1x NIC interface (one private ip and natted 1:1 with public address)

- *test*

1. *use case 1 : *connect two (2x) sipphone from private network (included kamailio) = OK 2. *use case 2 :* connect one (1x) codec from private ip and one (1x) codec from public network (like mobile) = = issue - disconnect after 30 s (register expires) start a conversation with audio but the caller or the callee continues to send and INVITE message. 3. *use case 3 :* connect two (2x) sipphone from public network = issue - disconnect after 30 s (register expires) start a conversation with audio but the caller or the callee continue to send an INVITE message.

Best Regards,

Youssef BOUJRAF