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

ID: Q150543

The information in this article applies to:

Microsoft Windows NT Server version 4.0
Microsoft Windows NT Server version 4.0, Terminal Server Edition
Microsoft Exchange Server, version 5.0
Windows NT Load Balancing Service 1.0

SUMMARY

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 the following articles in the Microsoft Knowledge Base:

Q174904 Information About TCP/IP Port Assignments

Q176466 XGEN: TCP Ports and Microsoft Exchange: In-depth Discussion

MORE INFORMATION

List of Ports Used by Windows NT version 4.0 services:


Function                    Static ports
--------                    ------------

Browsing                    UDP:137,138
DHCP Lease                  UDP:67,68
DHCP Manager                TCP:135
Directory Replication       UDP:138 TCP:139
DNS Administration          TCP:135
DNS Resolution              UDP:53
Event Viewer                TCP:139
File Sharing                TCP:139
Logon Sequence              UDP:137,138 TCP139
NetLogon                    UDP:138
Pass Through Validation     UDP:137,138 TCP:139
Performance Monitor         TCP:139
PPTP                        TCP:1723 IP Protocol:47
Printing                    UDP:137,138 TCP:139
Registry Editor             TCP:139
Server Manager              TCP:139
Trusts                      UDP:137,138 TCP:139
User Manager                TCP:139
WinNT Diagnostics           TCP:139
WinNT Secure Channel        UDP:137,138 TCP:139
WINS Replication            TCP:42
WINS Manager                TCP:135
WINS 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:135
Exchange Administrator      TCP:135
IMAP                        TCP:143
IMAP (SSL)                  TCP:993
LDAP                        TCP:389
LDAP (SSL)                  TCP:636
MTA - X.400 over TCP/IP     TCP:102
POP3                        TCP:110
POP3 (SSL)                  TCP:995
RPC                         TCP:135
SMTP                        TCP:25
NNTP                        TCP:119
NNTP (SSL)                  TCP:563

For additional information, please see the following article(s) in the Microsoft Knowledge Base:

Q176466 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)
ICA Client (Citrix)         TCP:1494<BR/>

Keywords : kbnetwork ntprotocol nttcp XGEN
Version : winnt:1.0,4.0,5.0
Platform : winnt
Issue type : kbinfo