Allow RPC over TCP communication for windows 11 printing

Question

I've been reading that Windows11 by default print using "RPC over TCP" instead of "RPC over Named pipes" for better security and they recommend below :-

Ensure that the RPC Endpoint Mapper port (135) isn't blocked.

Open up the high range ephemeral ports (49152 – 65535) on the server or follow the guidance in the Configuring RPC to use certain ports section below to specify a range of ports for RPC.

ref : https://learn.microsoft.com/en-us/troubleshoot/windows-client/printing/windows-11-rpc-connection-updates-for-print

We are hosting Printers on a 2012 Domain controller and all our client machines are Windows 10. Firewall on DC is tuned ON but all profiles are off at the moment. Do I need to unblock ports on our DC (ad mentioned above) on Windows firewall in addition to (Existing default File & printer sharing rules). If yes, will it be both Inbound and outbound rules.

Any action needed on Windows 11 client machine ?

Will this change impact my existing win10 client machines?

Answer 1

Firewall on DC is tuned ON but all profiles are off at the moment. Do I need to unblock ports on our DC

No, you would not. Since firewall is off nothing would be blocked. Also the default ports flowing on the domain network profile are listed here.
https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/config-firewall-for-ad-domains-and-trusts#windows-server-2008-and-later-versions

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