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MaxUserPort

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Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

Data type Range Default value

REG_DWORD

5,000–65,534 (port number)

5000

Description

Specifies the highest port number that TCP can assign when an application requests an available user port from the system. Typically, ephemeral ports (those used briefly) are allocated to port numbers 1024 through 5000.

Note

  • Windows Server 2003 does not add this entry to the registry. You can add it by using the registry editor Regedit.exe.