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".
Nov 06, 2015 · Remote Desktop Protocol will use the RemoteFX guest mode module to connect to the client computer. The server accepted a new UDP connection from client The multi-transport connection finished for tunnel: 1, its transport type set to TCP: Reason Code: 3 ( No UDP Packets Received ). TCP/UDP 1723. Remote Desktop Protocol (RDP) TCP/UDP 3389. Terminal Access Controller Access-Control System (TACACS) Protocol dependencies TCP/UDP: Typically, LDAP uses TCP or UDP (aka CLDAP) as its transport protocol. The well known TCP and UDP port for LDAP traffic is 389. SSL/TLS: LDAP can also be tunneled through SSL/TLS encrypted connections. The well known TCP port for SSL is 636 while TLS is negotiated within a plain TCP connection on port 389. You should open TCP and UDP 3389 (unless you specified a custom port). While the accepted answer (only TCP 3389) used to be correct at the time, it is no longer up to date. In 2012 Microsoft introduced UDP transport of RDP. Depending on your network this can drastically improve performance of your RDP session. NOTE: By default, RDP load balancing is not available on 3389 port for RAS Secure Client Gateway as this feature is not enabled and thus Gateway is not listening for it. However, there is a possibility to enable it. TCP: 4172: PCoIP. UDP: 4172: PCoIP. TCP: 3389: RDP. TCP: 9427: Optional for client drive redirection (CDR) and multimedia redirection (MMR). By default, when using Blast Extreme, CDR traffic is side-channeled in the Blast Extreme ports indicated previously. If you prefer, this traffic can be separated onto the port indicated here. TCP: 32111
Attention! TCP guarantees delivery of data packets on port 3389 in the same order in which they were sent. Guaranteed communication over TCP port 3389 is the main difference between TCP and UDP. UDP port 3389 would not have guaranteed communication as TCP.
Dec 08, 2016 · Changes in RDP over UDP behavior in Windows 10 and Windows 2016. When connecting to Windows Server 2016 or a Windows 10 over a RD Gateway we see 1 HTTP and only one UDP connection being established for a session. We used to see 1 HTTP and 2 UDP connections per session with Windows 8/8.1 and Windows Server 2012(R2) Attention! TCP guarantees delivery of data packets on port 3389 in the same order in which they were sent. Guaranteed communication over TCP port 3389 is the main difference between TCP and UDP. UDP port 3389 would not have guaranteed communication as TCP. Nov 01, 2012 · OK, so, i had to open UDP Port 3389 on my WAN Router. That is in addition to TCP 443. Seems obvious i guess, but took me a while ;o) I also set a GPO setting > (not sure if it is needed or not though) Computer Configuration > Admin Templates > Windows Components > RDS > RDS Sesion Host > Connections. Select RDP Transport Protocols - Use both
Jun 07, 2020 · Can be both: Every version of Microsoft Windows from Windows XP onward [4] includes an installed Remote Desktop Connection (RDC) ("Terminal Services") client ( mstsc.exe ) whose version is determined by that of the operating system or by the last
UDP ports use the Datagram Protocol. Like TCP, UDP is used in combination with IP (the Internet Protocol) and facilitates the transmission of datagrams from one computer to applications on another computer, but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received the message The View Agent installation program configures the local firewall rule for inbound RDP connections to match the current RDP port of the host operating system, which is typically 3389. If you change the RDP port number, you must change the associated firewall rules.