I've never used Nortel vpn, but have some familiarity with Cisco vpn. I need to make sure that a visitor on Friday will be able to use Nortel vpn from my office to remote desktop to a computer in his office. While I'm not concerned with connectivity at the other end, I want to make sure I have the necessary ports open at my end. Does all traffic over the Nortel vpn use the same port or does port usage follow standard protocol/port mappings? If Nortel is over 500 udp (both ends), does port 3389 need to be opened for RDP? Are there any other ports that need to be opened? Thanks.