Hello all, I'm a asterisk user, and would like to try FS now. I studied already the documentation. However, I still got some problems and questions, any help would be greatly appreciated. 1.) I've got a server with a IP reachable from the open, evil internet. I would like to disable this IP for FreeSWITCH, so that it's not possible to contact FreeSWITCH from there. Do I have to change the routing table of the operating system for this, or is it possible to exclude this ip in FS? 2.) I've got SIP trunk trough a german provider without registration. Authentication is based on IPs in a MPLS-net. So I set my IP in this net as the "external ip" in vars.xml After this, I setup the SIP trunk as a gateway sip-profiles/external.xml using the IP of the voice-switch of my provider as the proxy value and setting register to false. I think I'm still missing something, because sofia_gateway_data on the CLI is telling me "-ERR Parameter missing". I searched for this problem already, but found no solution. 3.) I would like to disable NAT completely, because I think I don't need this (and never used this in Asterisk). Actually there is no NAT involved in my setup. I achieved this using -nonat at startup. But I'm wondering, if there isn't a parameter to disable it by default. 4.) I've got another private (192.168.x.x) net connected to my server. All my phones are in there. So it set the internal ip in sip-profiles/internal to this. Is this correct? Thanks and Greetings from Berlin, Georg