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Hyper-V host

The following table lists the ports used by Hyper-V host:

Port Number

Port Type

Initiated by

Listening Process

Internal/External

Description

135

TCP

 

 

External

Used by WMI service of Windows OS. UDP uses WMI to interact with Hyper-V host in some situations.

445

TCP

 

 

External

Used by SMB service of Windows OS. UDP uses SMB to interact with Hyper-V host in some situations.

27000

TCP

UDP CBT Service

cbt_rep.exe

External

Used by UDP Host-based Backup CBT service. You do not need to register this port to the firewall exception because UDP automatically registers this port during backup. You need to verify that no other application is configured with the same port.

5895 or 5986

TCP

WinRM service

 

External

5895 for WinRM in HTTP protocol, 5896 for WinRM in HTTPS protocol. Only one of them is required. Only required when running Linux Instant VM to Hyper-V.