Policy

Enable Alternative Ports

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.

Policy
PackMicrosoft Windows
CategoryNetwork / Lanman Workstation
Policy ID1c89c4b7becb
Internal namePol_EnableAlternativePorts

Registry

Copy registry mappings

HKLM\Software\Policies\Microsoft\Windows\LanmanWorkstation\EnableAlternativePorts (enabled) = 1
HKLM\Software\Policies\Microsoft\Windows\LanmanWorkstation\EnableAlternativePorts (disabled) = 0

Policy notes

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.

Related policies

Alternative Port MappingsAudit insecure guest logonAudit server does not support encryptionAudit server does not support signingBlock NTLM (LM, NTLM, NTLMv2)Block NTLM Server Exception ListCipher suite order