OS X and Cisco VPN Errors

I spent far too much time this past week or so trying to get the Cisco VPN to work with my Mac. It was working fine a while back and I couldn't figure out what was happening. I kept getting the dreaded 'You don't have a device with an IP address' type error.

Anyhow, the fix was to disable the networking device fw0

sudo ifconfig fw0 down

Apparently this device is used by Parallels, I really couldn't care less at the moment, I'm just glad the vpn is working again.