By default the server listens on TCP port 3389
http://en.wikipedia.org/wiki/Remote_Desktop_Protocol . It can be configured to use different ports. If you are having problems connecting to some host, it might be possible that the host is behind a router and those ports are blocked. you can use :
http://portforward.com/help/portcheck.htm
to see if the port is open
It's Port 3389
A+ pg.987
A+ pg.969 Seventh Edition
Windows XP uses port 3389 as default for Remote Desktop connections
The default listening ports for Windows XP Remote Desktop are TCP port 3389 and UDP port 3389. Remote Desktop Protocol is available for several versions of Microsoft Windows as well as some alternate OS offerings.
RDP. Remote Desktop Protocol (RDP) is used by the Windows Remote Desktop and Remote Assistance utilities to connect to and control a remote computer. Remote Desktop and Remote Assistance listen at port 3389.
The standard port that Remote Desktop Protocol (RDP) uses is port 3389. An example of an application that uses this port is TeamViewer. Applications such as Teamviewer allow a person to look on his own computer from, for example, his/her mobile phone or tablet.
Microsoft Remote Desktop
Port 3389 is the only port you need to open. Windows will attempt to stream sound through User Datagram Protocol (UDP) first. If no port is available for UDP, sound will stream through a virtual channel in Remote Desktop Protocol, which uses port 3389. http://www.microsoft.com/windowsxp/using/mobility/rdfaq.mspx
it's 3389
3389 is the remote desktop protocol port.
Setup DNS on www.dyndns.com open port 3389 on your router/modem open remote desktop type in your dns name Note: PC must be on to connect to it
RDP. Remote desktop protocol in Microsoft systems. Also known as terminal services on port 3389.
By default wireless routers block all incoming connections. You need to to open the remote desktop port on the router. And also you might have to setup redirecting of incoming remote desktop connections on a particular pc.
Ports are only "enabled" if an application is listening on them. Unless you are running a web server on the computer, the port is not "enabled."