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DNS problems on windows server

Greetings!

I am having problems with dns server.

I recently changed the email server setting on clients applications. Now every few days (about 5-7 days) the clients dont resolve this server domain name anymore. (the server is on the internet)
When I do a restart of the service on windows server the resolving works again. (this server is on intranet)

I use Windows Server Standard 2008. There is no error in dns event log.

Thanks for suggestions!
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celjan79
Asked:
celjan79
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2 Solutions
 
Andrew DavisManagerCommented:
use DCDIAG to test the server.
see http://technet.microsoft.com/en-us/library/cc731968.aspx

if you have problems understanding the report, then feel free to post a copy and we will have a look.

Cheers
Andrew
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celjan79Author Commented:
I forgot to wrote sth else. When the resolving isnt working every domain name that is on that same server where I got email is not resolving.
But if I try some other domain names they work.
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Andrew DavisManagerCommented:
When it isnt working can the server resolve the name, or is it just the clients?

Do the clients have any secondary DNS settings?

are you connecting to the server as a local machine on your domain, or a public domain name. Eg server01.mydomain.local or mail.mydomain.com

can you paste a screenshot of the record that you have set in the DNS server?

Also please do the DCDIAG as this is the most likely tool to identify the issue.

Cheers
Andrew
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celjan79Author Commented:
When the resolving isnt working both the server and the client cant resolve domain names on that server. Then when I do restart everything is OK.

The client dont have and secondary DNS settings.

The domain name which does not resolve is public (on internet).
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Joseph NyaemaIT ConsultantCommented:
You need to give us some more information so that we can assess the impact of the changes you made.
What were the settings before and what did you change them to?
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celjan79Author Commented:
I run the dcdiag and found out:
- Win Time service was disabled (I now enabled it)

Now everything is marked as PASSED except this I get this message:

 Starting test: SystemLog
    An Warning Event occurred.  EventID: 0x000003FC
       Time Generated: 12/11/2013   09:41:24
       EvtFormatMessage failed, error 15100 Win32 Error 15100.
       (Event String (event log = System) could not be retrieved, error
       0x3afc)
    An Warning Event occurred.  EventID: 0x000003FC
       Time Generated: 12/11/2013   09:41:25
       EvtFormatMessage failed, error 15100 Win32 Error 15100.
       (Event String (event log = System) could not be retrieved, error
       0x3afc)
    An Warning Event occurred.  EventID: 0x000003FC
       Time Generated: 12/11/2013   09:41:42
       EvtFormatMessage failed, error 15100 Win32 Error 15100.
       (Event String (event log = System) could not be retrieved, error
       0x3afc)
    ......................... SERVER2008 passed test SystemLog
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celjan79Author Commented:
Nyaema: I did not change anything on the server. The only change I made was changing POP3 and SMTP server setting on Outlook on client computers.
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Andrew DavisManagerCommented:
If your local domain and internet domain are close then it is possible that the DNS server is looking for the node IP in its local file rather than forwarding the request to the internet.

I would create an (A) record entry in your DNS to link to your mail server.
if you are unsure how then see http://www.tutorialspoint.com/shorttutorials/adding-host-a-dns-records-in-windows-server-2008-r2

This would then stop the DNS server having to forward requests for this address.

Cheers
Andrew
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celjan79Author Commented:
AndrewJDavis:
When the resolving is not working when I use ping I get nothing. As if domain name would note be avaliable.

I found this article and it seems that this is known problem on Win2008 server.
http://support.microsoft.com/kb/2508835
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celjan79Author Commented:
For now I fixed this using restart from command prompt and using timer.
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