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DNS only and time out

Discussion in 'Bind / DNS / Nameserver Issues' started by upsforum, Aug 14, 2015.

  1. upsforum

    upsforum Well-Known Member

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    I have 2 server with cpanel dns only but with any domains in cluster dns lookup return time out, for example mxtoolbox.com return:

    Lookup failed after 2 name servers timed out or responded non-authoritatively

    I wathced log with this command:

    # tcpdump port 53 and '(tcp-syn|tcp-ack)!=0' | grep "appet"

    and I see that it work with most domains


    12:12:03.058258 IP pws3.mxtoolbox.com.51541 > HOSTNAME.DNS1.NET.domain: 1957 A? TESTDOMAIN.COM. (24)
     
  2. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello :)

    Do you have any firewall rules configured on these systems that could be filtering out traffic? Do you notice any error messages when restarting the Named service?

    Thank you.
     
  3. upsforum

    upsforum Well-Known Member

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    named not return errors, I need to check iptables?

    I verified that with http://www.intodns.com/appetitoo.com the name servers return old ip address (for any domains), I changed the ip of two server dns 3 week ago

    It could be a problem of serial number?
     
    #3 upsforum, Aug 14, 2015
    Last edited by a moderator: Aug 17, 2015
  4. cPanelMichael

    cPanelMichael Forums Analyst
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    You will need to ensure the name server IP addresses are updated at the domain registrar, not just with the "A" records on the cPanel server.

    Thank you.
     
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