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Active Directory Ports Hardening

> The below knowledge base is applies Windows Server to 2008It still applies.

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Active Directory Ports Hardening

Waiting for the reply from experts.Jaril Nambiar

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Active Directory Ports Hardening

Hello Wendy,Throughout the multiple technical blogs, I could not get any Active directory port details that applicable for Windows server 2012 and above. So requesting to Microsoft to provide the...

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Active Directory Ports Hardening

I have opened the single port and now the replication is working fine. But this is a work around. I would like to know the reason behind the non-standard RPC port used for the DFSR.exe by the...

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Active Directory Ports Hardening

Hi,Was your issue resolved? If you resolved it using our solution, please "mark it as answer" to help other community members find the helpful reply quickly.If you resolve it using your own solution,...

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Active Directory Ports Hardening

Hello Ernest,I went through the link and I can understand that is targeting to 'NON-DCs'.Jaril Nambiar

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Active Directory Ports Hardening

Hello Ernest,I'm with you in your suggestion. But my concern is, why the listening port came in an out-of-range than that of the standard?Jaril Nambiar

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Active Directory Ports Hardening

Hi Ernest, that's correct - however, according to Microsoft documentation, these dynamic ports should be within the range 49152-65535Fixing the ports is possible - but it appears that it should not be...

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Active Directory Ports Hardening

The thing to remember about RPC in general is the same service on a different computer can be exposed via a different RPC port. For example ServiceX on Server1 is on port 50001 and the same service...

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Active Directory Ports Hardening

Hi Jaril,agreed - in my opinion, this would warrant a call to Microsoft Supporthth Marcin

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Active Directory Ports Hardening

So can we consider this as a bug?Jaril Nambiar

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Active Directory Ports Hardening

Hi Jaril, this is surprising to see. My understanding is also that the ephemeral ports should be in the higher range - as long as you are using WS 2008 or newer.As far as I can tell, you have two...

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Active Directory Ports Hardening

I performed packet capture on the firewall and found that the RODC is trying to communicate with the DC on the port 27375 for DFRS replication. I checked on the DC, the DFRS.exe service is indeed...

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Active Directory Ports Hardening

hello,refer these for recommended port list.. Please add exceptions for that ports through firewall. Actual port list...

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Active Directory Ports Hardening

Hi Jaril,use the Message Analyzer/Wireshark on both endpoints - this should give you clear indication regarding the blocked port...hth Marcin

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Active Directory Ports Hardening

Hello experts,I have tried to restrict my domain controller network between the perimeter network and the corporate network. After a long 'googling' I have added the below ports in the outbond rules of...

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