Table 1. TCP and UDP Ports Used by View Agent or Horizon Agent; Source Port Target Port Protocol Description ; Horizon Client * View Agent/ Horizon Agent 3389 : TCP : Microsoft RDP traffic to remote desktops if direct connections are used instead of tunnel connections.
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.
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)
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)
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".
Jun 23, 2015 · Optimizing RDP – the longer story Enable UDP. Of course you have to open/forward TCP port 3389 to enable RDP. Since RDP 8.0 (came as an update to Windows 7 and Windows Server 2008 R2) there has been some additional improvements to the protocol. Notably an UDP connection has been added for adaptive/lossy transfer.