Port Requirements for the Windows Server system

This article discusses the essential network ports, protocols and services that are used by Microsoft client and server operating systems, server-based programs and their subcomponents in the Microsoft Windows server system. Administrators and support professionals may use this Microsoft Knowledge Base article as a road-map to determine what ports and protocols Microsoft operating systems and programs require for network connectivity in a segmented network.

The "System services ports" section of this article contains a brief description of each service, displays the logical name of that service, and indicates the ports and protocols that each service requires for correct operation. Use this section to help identify the ports and protocols that a particular service uses.

The "Ports and protocols" section of this article includes a table that summarizes the information from the "System Services Ports" section. The table is sorted by port number instead of by the service name. Use this section to quickly determine which services listen on a particular port.