I have CCM ver.5 and 2811 gateway connected through VPN tunnel (Easy VPN).
I advertised LAN network on the remote gateway and its reachable through the Call-Manager, but we couldn't advertise the WAN (VPN tunnel IP) because its variable..
So we can't ping (normal Ping) to the call-manager from the gateway but we can ping using the extended ping with LAN IP address as the source.
The MGCP is down and can't reach the call manger, but if we can change the MGCP source interface I think this will solve the issue.
Can you help to solve this problem.