TCP 3389 RDP Remote Desktop Protocol

If you want to start Remote Desktop from a command line or run prompt you want to use the Remote Desktop Command MSTSC or MSTSC.EXE which starts the Microsoft Remote Desktop client. You can find the remote desktop client under the accessories folder in all programs however it is much faster to start Remote [...]

The firewall port used by the Remote Desktop service is TCP 3389 otherwise known as the RDP port. Most firewalls including personal firewalls used in Windows and by third party applications block TCP 3389 by default. So to get Remote Desktop working through firewalls you or your firewall administrator will need open port [...]