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Windows NT, Terminal Server, and Microsoft Exchange Services Use TCP/IP Ports

This article was previously published under Q150543
This article discusses the known TCP/IP ports (TCP and/or UDP) that are used by services within Microsoft Windows NT version 4.0 and Microsoft Exchange Server version 5.0. This is not a complete list of TCP/IP port assignments.

For additional TCP/IP port assignment information, see thefollowing articles in the Microsoft Knowledge Base:
174904 Information About TCP/IP Port Assignments
176466 XGEN: TCP Ports and Microsoft Exchange: In-depth Discussion
List of Ports Used by Windows NT version 4.0 services:
Function                    Static ports--------                    ------------Browsing                    UDP:137,138DHCP Lease                  UDP:67,68DHCP Manager                TCP:135Directory Replication       UDP:138 TCP:139DNS Administration          TCP:135DNS Resolution              UDP:53Event Viewer                TCP:139File Sharing                TCP:139Logon Sequence              UDP:137,138 TCP:139NetLogon                    UDP:138Pass Through Validation     UDP:137,138 TCP:139Performance Monitor         TCP:139PPTP                        TCP:1723 IP Protocol:47 (GRE)Printing                    UDP:137,138 TCP:139Registry Editor             TCP:139Server Manager              TCP:139Trusts                      UDP:137,138 TCP:139User Manager                TCP:139WinNT Diagnostics           TCP:139WinNT Secure Channel        UDP:137,138 TCP:139WINS Replication            TCP:42WINS Manager                TCP:135WINS Registration           TCP:137				
List of Ports Used by WLBS and Convoy for Cluster Control:
Function                    Static ports--------                    ------------Convoy                      UDP:1717 WLBS                        UDP:2504				
List of Ports Used by Microsoft Exchange Server version 5.0:
Function                    Static ports--------                    ------------Client/Server Comm.         TCP:135Exchange Administrator      TCP:135IMAP                        TCP:143IMAP (SSL)                  TCP:993LDAP                        TCP:389LDAP (SSL)                  TCP:636MTA - X.400 over TCP/IP     TCP:102POP3                        TCP:110POP3 (SSL)                  TCP:995RPC                         TCP:135SMTP                        TCP:25NNTP                        TCP:119NNTP (SSL)                  TCP:563				
For additional information, see the following article or articles in theMicrosoft Knowledge Base:
176466 XGEN: TCP Ports and Microsoft Exchange: In-depth Discussion

List of Ports Used by Terminal Server Clients
Function                    Static ports--------                    ------------RDP Client (Microsoft)      TCP:3389 (Pre Beta2:1503)ActiveX Client (TSAC)       TCP:80, 3389ICA Client (Citrix)         TCP:1494				
NOTE: Terminal Server uses port 3389.

Additional Ports Used by Windows 2000 services:
Function                              Static ports--------                              ------------Direct Hosting of  SMB Over TCP/IP    TCP,UDP: 445IPSec:                         ISAKMP                             UDP: 500   ESP                                IP Protocol 50	   AH                                 IP Protocol 51Kerberos                              TCP,UDP: 88RSVP                                  IP Protocol 46				

Article ID: 150543 - Last Review: 02/21/2007 01:09:11 - Revision: 3.3

  • Microsoft Windows NT Server 4.0, Terminal Server Edition
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows NT Server 4.0 Standard Edition
  • Microsoft Windows NT Load Balancing Service
  • kbinfo kbnetwork KB150543