DNS Cache issue in windows server 2008

Discussion in 'DNS Server' started by Matt, Jan 10, 2010.

  1. Matt

    Matt Guest

    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
     
    Matt, Jan 10, 2010
    #1
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  2. 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
     
    Meinolf Weber [MVP-DS], Jan 11, 2010
    #2
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  3. 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.
     
    Ace Fekay [MVP-DS, MCT], Jan 11, 2010
    #3
  4. Matt

    Myztry Guest

    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.
     
    Myztry, Feb 8, 2010
    #4
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