Hi there.. I have an Exchange 2000 server running behind a Cisco NAT router. The server runs fine behind the firewall but I'm trying to access it from another location over DSL. In the router I"ve added port 135 UDP/TCP to point to the internal IP along with ports 4605,4606,4607,4608 as per the MS Technote - http://support.microsoft.com/directory/article.asp?ID=KB;EN-US;Q270836&; I made both TCP and UDP available as the technote doesn't specify which one's to use. Still cannot access my mailbox remotely. It asks for the mailbox username/password and domain but then times out. Did I miss something. I can ping the machine by it's servername from the remote system (server.psa is the machine/domain). Any ideas? :) Thanks, Paul