Brian Weaver wrote:
I have an Asterisk PBX on the private lan, which is protected from the public Internet with a Linux iptables machine. The firwall is it's own seperate box running NAT with SPI.
The only way to make this work well is to run a SIP proxy of some kind on the firewall system and tell the SIP client to use that proxy. Asterisk providing SIP behind a NAT and/or firewall is very difficult to get working. A SIP client behind a NAT, on the other hand, works fine as long as the client supports STUN.
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