I am a PC in a Mac family. Our home network features an Airport
Extreme Base Station which works quite well. Recently, I installed a
Cisco VPN client on my laptop to access my work server and e-mail.
The client works properly; I can get access via the VPN client from
most any public hot spot. At home is the problem - the client
properly creates the tunnel and secures it, but when I try to access
the server, I get no response; it sticks on "waiting for" and
eventually times out.

It seems clear there is something amiss with the AEBS, but I cannot
figure out what would cause this problem. Any suggestions on how to
fix this would be gratefully welcomed.