[AG-TECH] AG Vic/Rat NAT/Firewall setup requirements?

[Jerome]

What do you need to do to allow vic/rat to properly communicate with
people on AccessGrid when behind a NAT or firewall?  Will be using a
bridge that they would have to connect to i assume.

I want to know so i can be able to do such things when they arrise or
help people with  the issues, I had one person I helped figure out
their firewall but another is stumped...
 --jerome