How are you trying to connect to your exchange server? OWA- If that's the case then it just port 80 traffic. If you are accessing the exchange server directly then you have to open the ports needed for RPC. I would just use OWA. It works very well and you are not allowing RPC into your network. To make OWA more secure you can purchase an SSL certificate that will encrypt passwords as they are entered. MRL -----Original Message----- From: Paul Stewart [mailto:pauls@xxxxxxxxxxx] Sent: Monday, March 04, 2002 10:52 AM To: [ExchangeList] Subject: [exchangelist] Static Mapping / NAT Firewall http://www.MSExchange.org/ 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 ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: michael.lippman@xxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')