The cable modem is simple. DHCP ethernet port without any PPPoe.
It worked in the past with Smoothwall. 5960 and RTP traffic was passed. I did put it in the DMZ and it worked.
Something about the routing.
ETH00 goes to DHCP cable modem
ETH01 static IP with DHCP server
ETH02 is the XR4 card.
So I BR0=ETH01 and ETH02. Obtain dynamic IP on ETH00.
port forward 5060 4569 10000-20000 UDP to the Asterisk server. Using Virtual Server tab.
No dice. RTP traffic did not get pushed through.