I have an ASA 5505 which I need to open a couple of ports from the outside going in for servers. There are two servers, once handling mail and one for remote administrative access using RDP (Windows servers). The port number for RDP is 3389. If I try to RDP into the server from outside the network, it fails. However, if I try to RDP into the server from internally, even from a different site through a VPN tunnel, it works perfectly. When I open port 3389 to the entire network, I can RDP into the mail server, but I still am not able to RDP into the administrative server. Any suggestions would be welcome.