Comment Port Triggering (Score 4, Informative) 87
OK, first, it doesn't look like anyone from Apple has recommended that everyone using Nortel VPN clients simply set a default host and be done with it. This is a user discussion. Maybe some of those people are Apple employees, but I didn't notice anything telling me that they were. Second, the more appropriate solution would probably a be a port trigger, which the new base station supports. I don't use Nortel VPN, and my Cisco VPN is working fine with my new Extreme, but this thread seems to imply that a simple port trigger fixed the exact same issue for Linksys users.
Hopefully that will help.