Active Directory and Active Directory Domain Services Port Requirements. Updated: March 28, 2014 Applies To: Windows Server 2000, Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2, Windows Server 2008, Windows Server 2008 Foundation, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Vista In a domain that consists of Windows Server® 2003–based domain controllers, the default dynamic port range is 1025 through 5000.
Windows Server 2008 R2 and Windows Server 2008, in compliance with Internet Assigned Numbers Authority (IANA) recommendations, increased the dynamic port range for connections. The new default start port is 49152, and the new default end port is 65535. Therefore, you must increase the remote procedure call (RPC) port range in your firewalls. RPC traffic is used over a dynamic port range as described in the previous section, “Default dynamic port range.”
Network Ports Used by Key Microsoft Server Products. On This Page Introduction Term Usage Microsoft Server Product Ports Ports and Protocols For More Information Related Topics Introduction This document discusses the network ports and protocols that are used by server products and their subcomponents in the Microsoft Windows Server System.
The Windows Server System includes a comprehensive and integrated infrastructure that is designed to meet the requirements of developers and information technology (IT) professionals. This system is designed to run programs that information workers can use to obtain, analyze, and share information quickly and easily. Term Usage The following list provides an overview of the information contained in this document: The "Microsoft Server Product Ports" section of this document contains a brief description of each service, displays the logical name of that service, and indicates the ports and protocols required by each service for correct operation. This document uses certain terms in specific ways. DHCP Server. TCP and UDP Port Assignments.
Transport Control Protocol (TCP), User Datagram Protocol (UDP) ports, and Protocol Numbers are important to TCP/IP networking, intranets, and the Internet.
Ports and protocol numbers provide access to a host computer. However, they also create a security hazard by allowing uninvited access. Therefore, knowing which port to allow or disable increases a network's security. If the wrong ports or protocol numbers are disabled on a firewall, router, or proxy server as a security measure, essential services might become unavailable. In This Appendix Port Assignments and Protocol Numbers Port Assignments for Commonly-Used Services Protocol Numbers Related Information in the Resource Kit For a complete listing of Well-Known Ports, Registered ports, and protocol numbers, see the Port Assignments link on the Web Resources page at .
Information about TCP/IP port assignments. This article provides information about port assignments for various TCP/IP ports.
This was previously documented in RFC 1700. The assignments are now listed as living documents, regularly updated and revised when new information is available and new assignments are made. The specific location of the port numbers list is now available at the following Web site: The port numbers are divided into three ranges: the Well Known Ports, the Registered Ports, and the Dynamic and/or Private Ports.The Well Known Ports are those from 0 through 1023.The Registered Ports are those from 1024 through 49151.The Dynamic and/or Private Ports are those from 49152 through 65535. The Well Known Ports are assigned by the IANA and on most systems can only be used by system (or root) processes or by programs executed by privileged users. The contact port is sometimes called the "well-known port" .To the extent possible, these same port assignments are used with the UDP [RFC768].