Hello all,
I have need here now of a second external IP address and my ISP has given me a /30 subnet.
A friend of mine has configured my Cisco 1841 to do all the routing. Everything seemed to be working fine until I got a phone call come in … no audio and drops after a few seconds with error about no response to critical packet.
I already knew this was RTP port forward problem from previously trying to add a Cisco 877.
I have tried the below to no avail in the 1841.
[code]access-list 101 permit udp any range 10000 20000 any
route-map NAT permit 10
match ip add 101
ip nat inside source static free.pbx.ip.address free.pbx.subnet.mask route-map NAT[/code]
My knowledge in Cisco is very limited and friend left a few hours ago. he does not know how to forward a range of ports and says it is unsupported in Cisco … Really ???
Switch back to my Billion router and all is OK (Except i cannot use second WAN IP)
Can someone please help?
Although it should not matter, my FreePBX version is 3.211.63-10 and i am not sure how to get my IOS version but I know it is Broadband level (no advanced services)