Thelos

Hi! I wonder how to go from: Via: SIP/2.0/UDP InternalIP:5060;branch=abc;rport From: "0123456" <sip:0123456@isp.lan>;tag=123 Contact: <sip:0123456@InternalIP:5060;transport=udp> to something like this?  Via: SIP/2.0/UDP ExtIP:5060;branch=abc;rport From: "0123456" <sip:0123456@isp.lan>;tag=123 Contact: <sip:0123456@isp.lan:5060;transport=udp> User-Agent: MyCustomCPEname o=- x x IN IP4 ExtIP c=IN IP4 ExtIP  I'm afraid it is not possible without NAT, but at least ExtIP is static. Thanks.