Im starting kamailio with listen=0.0.0.0:5060 and in my dispatcher list i have in the attrs something like: socket=udp:172.17.0.2:5060

That IP address belongs to kamailio's host and it is binging to it.

Is it right i can't set a specific IP in the socket attribute if listen is 0.0.0.0?

maybe i should be able to?