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seyah96's avatar
seyah96
Copper Contributor
Aug 31, 2021

RPC server is unavailable

Hello,

 

I have this weird issue where I can't change domain controllers from ADUC or any active directory services. I'm not sure where to start troubleshooting this kind of issue. I can reach all other domain controller from the problematic DC but I can't do it from other DC's to the problematic DC. 

 

Any help would be appreciated.

 

 

 

10 Replies

  • Sanjay78's avatar
    Sanjay78
    Copper Contributor
    It looks like Internal or External Firewall issue. Inbound and outbond AD Traffic need to allow on VPN or Network Firewall.. Windows Firewall also need to check If any AV preventing the AD traffic.
    Portquery will let you know the list of ports blocks.
    https://www.microsoft.com/en-in/download/details.aspx?id=24009
  • Please run;

    Dcdiag /v /c /d /e /s:%computername% >C:\dcdiag.log
    repadmin /showrepl >C:\repl.txt
    ipconfig /all > C:\dc1.txt
    ipconfig /all > C:\dc2.txt
    ipconfig /all > C:\dc3.txt

    ipconfig /all > C:\dc4.txt

    ipconfig /all > C:\dc5.txt

    then put `unzipped` text files up on OneDrive and share a link.

     

     

     

    • seyah96's avatar
      seyah96
      Copper Contributor

      Hi Dave,

      Here's the link to the results.

      https://1drv.ms/u/s!AvTOVnZsYb5RhzLV5mPTwbYsZfox?e=ovOuSe

      Thanks!

      • - BAMAZAD01 is DHCP assigned which should never happen for a domain controller, should always be static!

         

        - On BAMAZAD01 I'd add the server's own static ip address (10.100.5.4) listed for DNS, then do ***ipconfig /flushdns, ipconfig /registerdns***, restart the ***netlogon*** service

        - On BAMTORDC02 I'd add the server's own static ip address (10.10.10.182) listed for DNS, then do ***ipconfig /flushdns, ipconfig /registerdns***, restart the ***netlogon*** service

        - bardrdc02.txt file is for BAMDRDC02

        - dcdiag was run from BAMTORDC02 which seems to have a lot of problems. I'd check the event logs for related errors. Better run from BAMTORDC01

         

         

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