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  1. #1
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    Nov 2010
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    Default DNS not resolving throught Untangle

    I've been running Untangle at a client's for over a year now with no problems. On last Friday I updated untangle to the latest version. Monday the client reported that they could not get out to the web. After some checking I found that DNS was not resolving to anything on the other side of Untangle. After checking my DNS servers setting and verifying that my upstream DNS server was running by connection a laptop in to the modem was working. I tried check the DNS bypass rule to get the DNS server to resolve address and that worked but why would this suddenly happen after I updated my system?

  2. #2
    Untangle Ninja sky-knight's Avatar
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    Apr 2008
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    Phoenix, AZ
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    Default

    Why does anything ever happen when a configuration change is made?

    Are you having Untangle do the DNS? Or are you using other services? Where is the DHCP service?

    If you have clients making DNS queries THROUGH the Untangle and you haven't bypassed that traffic yet, all you're doing is injecting delay in your network resolution. Hence the reason why there is a built in bypass rule for this process.

    It sounds to me, that regardless of the cause, the situation may have helped you do a bit of necessary Untangle tuning.
    Rob Sandling, BS:SWE, MCP
    NexgenAppliances.com
    Phone: 866-794-8879 x201
    Email: support@nexgenappliances.com

  3. #3
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    My DNS and DHCP are on my windows 2003 SBS box

  4. #4
    Untangle Ninja sky-knight's Avatar
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    And the SBS 2003 box uses what for resolution itself?

    And what does Untangle use for DNS resolution?
    Rob Sandling, BS:SWE, MCP
    NexgenAppliances.com
    Phone: 866-794-8879 x201
    Email: support@nexgenappliances.com

  5. #5
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    Nov 2010
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    both of them use the ISP's dns

  6. #6
    Untangle Ninja sky-knight's Avatar
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    Ok, then you'll want to bypass DNS to improve DNS resolution performance of your AD server. You may consider crafting your own bypass rule to limit the bypass to your AD server specifically.

    Either way, you don't want to be scanning DNS traffic. Untangle when busy can slow sessions down, DNS needs to be quick and snappy or things break.
    Rob Sandling, BS:SWE, MCP
    NexgenAppliances.com
    Phone: 866-794-8879 x201
    Email: support@nexgenappliances.com

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