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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This article has been archived. It is offered "as is" and will no longer be updated.
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: 12/04/2015 14:38:57 - 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

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