Enable Alternative Ports

Supported on: At least Windows Server 2025, Windows 11

Registry

HKLM Software\Policies\Microsoft\Windows\LanmanWorkstation

Value name: EnableAlternativePorts

Enabled: EnableAlternativePorts = 1

Disabled: EnableAlternativePorts = 0

Description

This policy controls whether the SMB client will enable or disable alternative ports. If you disable this policy setting, alternative ports will not be used by the SMB client. If you do not configure this policy setting, alternative ports may be used by the SMB client.