Reserving a TCP Port in Windows

HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\ReservedPorts

Above is the registry key that needs tweaked in order to reserve a TCP port. This will protect this port from any inadvertent randomn future assignment by software, patch, or service as what has happened over this past week with the DNS patch.

  • http://blogs.technet.com/sbs/archive/2008/07/17/some-services-may-fail-to-start-or-may-not-work-properly-after-installing-ms08-037-951746-and-951748.aspx
  • http://support.microsoft.com/kb/812873
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    One response to “Reserving a TCP Port in Windows

    1. Fictional silliness,

      Hello Waiter
      Yes sir
      I’d like to order a port bring me your finest – what do you recommend
      Well, port 135 is a very good port sir – it’s very popular
      hmmm well OK why is it so well liked
      The PING is strong in this one
      ah well OK bring us the bottle right away
      I’ll be back in milliseconds

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