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Intermittent DNS Problem

Discussion in 'Bind / DNS / Nameserver Issues' started by WebIdentity, Apr 19, 2007.

  1. WebIdentity

    WebIdentity Member

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    Hi There

    I had recently moved about 70 users to a new server, new dc, etc about 1 month ago.

    Although it may seem that i had ironed out any config problems or issues that people may of had i'm still scratching my noggin about a particular issue.

    Occasionally i receive this error in /var/log/messages during which time nobody else can resolve any of the domains binded to my server, you wait 5 mins the problem is magically fixed and i'm left wondering whats going on.

    Code:
    Apr 19 21:15:53 srv01 named[2972]: client 84.103.237.145#6882: error sending response: host unreachable
    Apr 19 22:17:42 srv01 named[2972]: client 212.43.194.3#4668: error sending response: host unreachable
    Apr 19 22:18:14 srv01 named[2972]: client 212.43.194.3#4668: error sending response: host unreachable
    Apr 19 23:41:01 srv01 named[2972]: client 212.43.194.3#4668: error sending response: host unreachable
    Apr 19 23:41:33 srv01 named[2972]: client 212.43.194.3#4668: error sending response: host unreachable
    Apr 20 00:09:05 srv01 named[2972]: client 192.114.65.49#4670: error sending response: host unreachable
    
    I have tried reconfiguring apf to follow the following firewall rules.

    http://faq.cpanel.net/show.cgi?qa=108499296901804

    And I have changed the /tmp directory permissions to 1777 as suggested in other fixes.

    I have upcp'ed, fixnamed, fixeverything (pretty much) to no avail.

    I have tested this issue by digging through other nameservers and on occasions i can get a SERVFAIL message, but nothing really conclusive to help me track down the problem.

    If anyone has some suggestions i would be very open to trying a few things. Thanks very much.

    Server Name is srv01.webidentity.com.au and a non-authoritive domain is webvantage.com.au

    Cheers.
     
  2. WebIdentity

    WebIdentity Member

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    Apr 20 01:04:21 srv01 named[2972]: client 212.43.194.3#4668: error sending response: host unreachable
    Apr 20 01:04:54 srv01 last message repeated 33 times
    Apr 20 01:04:54 srv01 named[2972]: client 212.43.194.3#4668: error sending response: host unreachable

    This happened again (just then) and dns just died
     
    #2 WebIdentity, Apr 19, 2007
    Last edited: Apr 19, 2007
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