I am trying to connect to a VPN concentrator that is behind a 2600 router using NAT-T. I have 2 ports open for the NAT-T setup. Port UDP 500 and Port UDP 4500. My access-list are setup to allow traffic NAT from a public ip to a 10.100.1.2 ip of the public interface for the VPN Concentrator. When I attempt to connect then do a sh access-list I have matches on the UDP port 500 but, the 4500 port is not showing any match attempts fromt he outside. It is like My software or computer is not even trying to connect using that port. Any Ideas????
I have this problem too.