Hi Dear

I am trying to understand how "listen" and "advertise" work for sip signaling purpose ( corebooks : listen and advertise )

Flow : kamailio behind NAT using softphones on private and public networks.

- kamailio :

Network :

IPv4_private 192.168.1.6 / IPv4_public

kamailio.cfg :

listen=udp: IPv4_private: 5060 advertise  IPv4_public : 5060 

- uac (softphone) :

zoiper, microsip, cisco spa508g

USE CASE :

I 'd like to force all softphone on the same local network to reach kamailio through a public ip address.

??? QUESTION : Do I need to REGISTER on IPv4_private address of Kamailio OR REGISTER on IPv4_public address of kamailio or DEFINE another "listen" with another PORT WITHOUT "advertise"  for softphone on same kamailio network ?

listen=udp: IPv4_private: 5060 advertise  IPv4_public : 5060 

listen=udp: IPv4_private: 5066