[Asterisk-Users] Asterisk as SIP client behind NAT

[steve]

Port forwarding might work.  My preferred method would be to bridge the 
connection from the broadband modem to the * box, thus giving it the 
public IP address.  Then add a 2nd NIC to multi-home it and turn it into 
the router/asterisk/dhcpd/firewall box.  Run that connection to a switch 
and out to your LAN.  By doing this you circumvent the SIP/NAT issue.

Your Mileage May Vary,
Steve Cayona

Network Tech Director
Super Technologies, Inc.