What is RDP (Remote Desktop Protocol)? And how to troubleshoot RDP server problem?

Remote Desktop Protocol (RDP) is a proprietary protocol developed by Microsoft, which provides a user with a graphical interface to connect to another computer over a network connection. The user employs RDP client software for this purpose, while the other computer must run RDP server software.

Clients exist for most versions of Microsoft Windows (including Windows Mobile), Linux, Unix, macOS, iOS, Android, and other operating systems. RDP servers are built into Windows operating systems; an RDP server for Unix and OS X also exists. By default, the server listens on TCP port 3389 and UDP port 3389.

Microsoft currently refers to their official RDP client software as Remote Desktop Connection, formerly "Terminal Services Client".

Here is the checklist when you troubleshoot RDP issues on a Windows 10 computer.

• Make sure the "Remote Desktop Services (TermService)" service is running.
• Make sure the "Remote Desktop Services UserMode Port Redirector (UmRdpService)" service is running.
• Make sure the "Remote Desktop Configuration (SessionEnv)" service is running.
• Make sure "fDenyTSConnections" registry is turned off (change value from 1 to 0). "fDenyTSConnections" registry is under the "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server" node.
• Make sure the "RemoteDesktop-UserMode-In-TCP" inbound firewall rule is turned on on port 3389 from all IP addresses.
• Make sure the "RemoteDesktop-UserMode-In-UDP" inbound firewall rule is turned on on port 3389 from all IP addresses.

⇒ "Remote Desktop Services - TermSrv.dll" Service on Windows 10

⇐ Change File Properties to Share on Windows 10

⇑ Networking with Windows 10

⇑⇑ Windows 10 Tutorials