DNS Cache issue in windows server 2008

Scenario

The users are complaining of having no internet access on their workstations.
Some users are reporting that "some" websites are working while others are
not.

Our solution at the moment

The Solution for this is to clear the DNS cache. This is done by the usual
way of start -> Administrative tools -> DNS, right clicking the server and
selecting clear cache.

But this is not a permanent solution as the problem comes back eventually
within a month or 2.
Why this is happening I do not know, it is only specific to 2008 and is
peculiar.
It seems to only effect websites/address that have already been visited,
this is why some sites are still accessible.

Any help anyone can provide would be great. We have 4 seperate domain
servers at different locations with this exact same problem (none of them
related). All of them being microsoft small business server 2008
thanks

Hello Matt,

Do you use only domain DNS servers on the clients NIC and Forwarders on the
DNS server to your ISP?

Best regards

Meinolf Weber
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> Scenario
>
> The users are complaining of having no internet access on their
> workstations. Some users are reporting that "some" websites are
> working while others are not.
>
> Our solution at the moment
>
> The Solution for this is to clear the DNS cache. This is done by the
> usual way of start -> Administrative tools -> DNS, right clicking the
> server and selecting clear cache.
>
> But this is not a permanent solution as the problem comes back
> eventually
> within a month or 2.
> Why this is happening I do not know, it is only specific to 2008 and
> is
> peculiar.
> It seems to only effect websites/address that have already been
> visited,
> this is why some sites are still accessible.
> Any help anyone can provide would be great. We have 4 seperate domain
> servers at different locations with this exact same problem (none of
> them
> related). All of them being microsoft small business server 2008
> thank

"Matt" <> wrote in message
news:83A51B6F-2C25-4F5E-AAFB-...
> Scenario
>
> The users are complaining of having no internet access on their
> workstations.
> Some users are reporting that "some" websites are working while others are
> not.
>
> Our solution at the moment
>
> The Solution for this is to clear the DNS cache. This is done by the usual
> way of start -> Administrative tools -> DNS, right clicking the server and
> selecting clear cache.
>
> But this is not a permanent solution as the problem comes back eventually
> within a month or 2.
> Why this is happening I do not know, it is only specific to 2008 and is
> peculiar.
> It seems to only effect websites/address that have already been visited,
> this is why some sites are still accessible.
>
> Any help anyone can provide would be great. We have 4 seperate domain
> servers at different locations with this exact same problem (none of them
> related). All of them being microsoft small business server 2008
> thanks



In addition to Meinolf's suggestions, does your edge firewall support EDNS0?
What brand and model is your firewall?

--
Ace

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

Please reply back to the newsgroup or forum for collaboration benefit among
responding engineers, and to help others benefit from your resolution.

Ace Fekay, MVP, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE &
MCSA 2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer
Microsoft MVP - Directory Services

If you feel this is an urgent issue and require immediate assistance, please
contact Microsoft PSS directly. Please check http://support.microsoft.com
for regional support phone numbers.

You are not alone in this issue. DNS queries against the SBS server fail
except for some recently resolved addresses until the cache is cleared.
DNS from the router web interface still works fine ruling out external
failure. Changing the router from the ISPs to Google's doesn't help either as
the client are still querying the dodgey internal Microsoft DNS server.
Even reboots of the server doesn't solve the issue.

"Matt" wrote:

> Scenario
>
> The users are complaining of having no internet access on their workstations.
> Some users are reporting that "some" websites are working while others are
> not.
>
> Our solution at the moment
>
> The Solution for this is to clear the DNS cache. This is done by the usual
> way of start -> Administrative tools -> DNS, right clicking the server and
> selecting clear cache.
>
> But this is not a permanent solution as the problem comes back eventually
> within a month or 2.
> Why this is happening I do not know, it is only specific to 2008 and is
> peculiar.
> It seems to only effect websites/address that have already been visited,
> this is why some sites are still accessible.
>
> Any help anyone can provide would be great. We have 4 seperate domain
> servers at different locations with this exact same problem (none of them
> related). All of them being microsoft small business server 2008
> thanks