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DNS Problem


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3 replies to this topic

#1 glnbnz

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Posted 09 January 2009 - 12:21 PM

I am having an intermittent problem on my Win 2003 SBS network. I have a Sharepoint website and it is configured in DNS to resolve to 192.168.20.3 (the main server) which is also the DNS server. The server is also the DHCP server.

The problem I am having is that sometimes when I type in the website (which is internal use only) my page gets redirected to an OpenDNS page (outside the network). Sometimes it works fine. When I am having the problem I can go to another computer on the network and it resolves the website.

I have a network of about 20 computers. Right now I only know of 2 computers that this is happening on 1 has a static IP and the other has a dynamic.

Also on the statically programmed IP computer if I change the IP address then the website is resolved.

***The reason I think that it is a DNS problem is because I have a remote administrator program and it has the same problem where sometimes it can resolve the computer by its name and sometimes I have to use its IP address.


Has anyone else experienced this kind of problem? Any suggestions?
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#2 Monty007

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Posted 09 January 2009 - 03:16 PM

Hi, have you tried at a command prompt:
ipconfig /flushdns
then:
ipconfig /registerdns

What happends when you ping it via name? Does it resolve correctly?
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#3 glnbnz

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Posted 09 January 2009 - 05:23 PM

Monty007,

Thanks for responding. Right now everything is working correctly so I can't test ipconfig/ commands I will keep these in mind for future reference.

I am not too sure what you mean by "ping it via name"

I did try to ping it with its name companyweb/default.aspx and it couldn't be resolved.
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#4 raw

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Posted 09 January 2009 - 10:52 PM

I did try to ping it with its name companyweb/default.aspx

This is incorrect. Ping the fully qualified domain name.
ping companyweb.com (org,net)
Next test:
nslookup companyweb.com
This will show the IP's for the nameserver the workstation is using.
Verify they match the internal name server.
tracert companyweb.com
On an internal network there should only be 2-3 hops.
Either the workstation is bypassing the internal DNS server or
the DNS server is polling OpenDNS for your domain.
You can configure the workstation to use static nameserver IP's or
edit the HOSTS file and point <companyweb> to the server IP.

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