I am trying to solve an issue where the attached device on the PC side of a 7912 is not able to connunicate with the network.Any idea's.

Can the ISAKMP UDP port 500 change at any time? I have just resolved a problem where the ISAKMP destination port had changed to UDP/9.. It was UDP/500 three days ago? I am under the impression that this is fixed in the router and should not change ...

Is there any way to monitor non IP traffic on an FE interface. This needs to be done remotely. I am looking for traffic that is not IP in particular LAT or IPX.Skyplanck

HIIs there any way of determining what ports are classified under the Unknown type when using the "show ip nbar protocol-discovery" show command.Mark