DCOM ports- Bi-directional

Hi Team,

 

We were following the guide and read that

 

The DCOM protocol requires that the following ports are open: 135, 137, 138, and 139.
In addition it uses arbitrary ports between 1024 and 65535, but there are ways to restrict the
port range used by WMI/DCOM/RPC.

 

However, our network team wants to know if bi-directional access required for DCOM Ports?

 

Please advise.

 

Thank you.

 

Regards

Mathew

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