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DNS Issues

Discussion in 'Bind / DNS / Nameserver Issues' started by Aaron Guise, Nov 1, 2011.

  1. Aaron Guise

    Aaron Guise Registered

    Nov 1, 2011
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    Hamilton, New Zealand, New Zealand
    cPanel Access Level:
    Root Administrator
    Hi All,

    I really hope someone can help assist. I have one cPanel/WHM server (ns1) and a cPanel DNS Only server (ns2). The cluster is like this.

    Webserver(ns1) - Synchronise Changes
    -> DNS Only (ns2) Standalone

    So when both of my nameservers are up and responding the requests are balanced between ns1 and ns2 quite ok. However I had an instance the other day when nsd malfunctioned on (ns1) and the websites I host became unavailable due to DNS. ns2 could not be found at all while ns1 was down so the dns would not resolve.

    I clearly must have something wrong in my dns setup and would appreciate if anyone can help point this out.

    I know it was nsd misbehaving as using the IP I was able to login to WHM and once restarted it was working lightning quick.

    I have included my DNS Zone files from the DNS Only server for reference.

    DNS Zone for NS1:
    ; cPanel first: (update_time):1319454082 Cpanel::ZoneFile::VERSION:1.3 latest:
    ; Zone file for
    $TTL 14400
    @      86400    IN      SOA (
                    2011092901      ; serial, todays date+todays
                    86400           ; refresh, seconds
                    7200            ; retry, seconds
                    3600000         ; expire, seconds
                    86400 )         ; minimum, seconds 86400 IN NS 86400 IN NS
     IN A IN A IN MX 0
    mail IN CNAME
    www IN CNAME
    ftp IN CNAME
    DNS Zone for NS2:
    ; cPanel first: (update_time):1319454082 Cpanel::ZoneFile::VERSION:1.3 latest:
    ; Zone file for
    $TTL 14400   3600    IN      SOA       (
                                                    2011102406 ;Serial Number
                                                    3600 ;refresh
                                                    7200 ;retry
                                                    3600000 ;expire
                                                    3600 ;minimum
            )   86400   IN      NS   86400   IN      NS   3600    IN      A
    localhost       14400   IN      A   14400   IN      MX      0
    mail    14400   IN      CNAME
    www     14400   IN      CNAME
    ftp     14400   IN      CNAME
  2. cPanelTristan

    cPanelTristan Quality Assurance Analyst
    Staff Member

    Oct 2, 2010
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    somewhere over the rainbow
    cPanel Access Level:
    Root Administrator
    You might try having the nameserver A records for ns1 and ns2 on both machines rather than ns1 having the A record for it and ns2 having the A record for it only.

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