Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

The value ReservedPorts in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters contains a list of port ranges to reserve so the system won't assign them to programs dynamically.

Will the value be understood if it contains overlapping ranges?


I am trying to add ports to the list of reserved ports during an installation and am wondering whether I can just add my new range or whether I have to expand the existing ranges and see if my range overlaps with one of them and then extend the overlapped range instead of just adding my new range.

share|improve this question
up vote 2 down vote accepted

Turns out Windows Server 2008 does not support the ReservedPorts registry value:

This issue occurs because Windows Server 2008 and Windows Server 2008 R2 do not support the ReservedPorts registry key.

share|improve this answer
Note that the KB article you've referenced links to a hotfix re-adding this functionality and exposing an interface to exclude ports via netsh. – the-wabbit Jul 30 '12 at 10:30
I know. Thanks. – Andrew J. Brehm Jul 30 '12 at 13:43
See this StackOverflow answer for more complete instructions on using netsh to exclude ports from the dynamic port range in Server 2008+. – Twisty Jun 6 at 16:16

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.