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Server 2008 incoming connection blocked

We are running server 2008 R2 and we are unable to access any other server or PC on network on this server, but we can access this server on other computers, the incoming connection got blocked for some reason.

this started after the daylight saving time change in Australia, the first error was 1065, please advise.
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Aussy99
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Aussy99
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1 Solution
 
John HurstBusiness Consultant (Owner)Commented:
Is the time correct?  

Look at this blog for possible variations on your server
https://blogs.technet.microsoft.com/dst2007/

Is there a change to the Firewall blocking connections?
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Aussy99Author Commented:
Yes the time on the server show correct and we didnt do any changes on the server in recent past.

there are error 1065 The processing of Group Policy failed. Windows could not evaluate the Windows Management Instrumentation (WMI) filter for the Group Policy object CN={1CCE6245-DB96-48EB-8F2F-23200AF82EDA},CN=POLICIES,CN=SYSTEM,DC=ULASER,DC=LOCAL. This could be caused by RSOP being disabled  or Windows Management Instrumentation (WMI) service being disabled, stopped, or other WMI errors. Make sure the WMI service is started and the startup type is set to automatic. New Group Policy objects or settings will not process until this event has been resolved.

error 1054 The processing of Group Policy failed. Windows could not obtain the name of a domain controller. This could be caused by a name resolution failure. Verify your Domain Name System (DNS) is configured and working correctly.
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John HurstBusiness Consultant (Owner)Commented:
There is a solution here where the setting  on the NIC on the DC had the "Register this connection's addresses in DNS" checkbox cleared.

https://social.technet.microsoft.com/Forums/office/en-US/884e59a4-0037-4714-bfdb-957046182e13/recreating-ad-dns-records-on-server-2008-r2?forum=winserverDS

That could possibly explain the change and the error. I have seen NIC settings change occasionally.
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Aussy99Author Commented:
We have run WMi diag tool also and the result didnt show errors.

this is a virtual server running for 2 years without any problems.
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John HurstBusiness Consultant (Owner)Commented:
That does not tell us much. Something changed.

There is a NIC (albeit virtual) inside the guest. Did you check it?

What controls host networking outside? Is it bridged? Did you check the host NIC?

Did you change the Firewall?  I asked that earlier.
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Aussy99Author Commented:
Hi John, just checked the NIC and the checkbox is not cleared its already checked, anymore suggestions.
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Aussy99Author Commented:
No we did not made any change in the firewall or anywhere on the server, nothing at all.
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John HurstBusiness Consultant (Owner)Commented:
You might try resetting DNS resolver cache with DNS Flush.

https://technet.microsoft.com/en-us/library/cc816827(v=ws.10).aspx

I run DNS Flush on client workstations when they cannot connect. Try it on your server. We have all new Server 2012 at clients and DNS is working fine.
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John HurstBusiness Consultant (Owner)Commented:
By the way, whenever I run DNS Flush (or TCP/IP Reset - which you can also run), I shut down the machine and start it up again.

Please do this when you restart the server.

Have you restarted the server?  Sometimes a restart will start a service that has stopped.
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Aussy99Author Commented:
Did the DNS flush but still no luck.
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Aussy99Author Commented:
We have not restarted in last 2 years, at this stage the only concern is that at the moment I have the outgoing connection working on the server so the users can access things and if restart would cripple the outgoings.
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John HurstBusiness Consultant (Owner)Commented:
We have not restarted in last 2 years  ????????

That means you have not updated your server either.

Please update and restart. Servers HAVE to restart at reasonable intervals.
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Aussy99Author Commented:
I know but the problem is that its installed in an business environment which run 24X7 and hence the restart would log off users and work i.e. its not restarted in last 2 years, will schedule with client to restart it.
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John HurstBusiness Consultant (Owner)Commented:
There have been CRITICAL updates in the last 2 years. You cannot do what you are doing. It is utterly careless and irresponsible. Sorry to be blunt, but you have to determine a downtime window. Every single thing on the planet of every kind needs maintenance.
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David Johnson, CD, MVPOwnerCommented:
One should not have 1 server for an environment that is required 24/7 at the very minimum you should have 2 servers in a HA setup. This way you can do windows updates, hardware updates etc
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