Hi Sergio,
thank you for you support and thank you about the three posibilities you suggest to me!
I prefer the second one because the third could create problems with other services in the
VPN and the first one is a little bit difficult for a neophyte user with SIP concepts.
So i prefer the second one!
Can you suggest me how i can change my Kamailio configuration to do this behavior?
Thanks you so much in advance
Christian