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  • DNS strange behavior

    Hi

    i have this strange behavoir of my DNS
    when i try the command nslookup
    for example nslookup google.com

    the following happends
    1- it resolves the name directly and give me the result or
    2- if i do the same process again for the same domain it tries to resolve the name and then it gives me a request time out

    i mean the resolving is happening randomly for the internet domains. but for my AD computers it resolves the names without any problem.

    example:
    nslookup google.com
    >FQDN
    IP Address

    google.com
    ....... <- list of the ip addresses it resolves

    now if repeat the same thing i get different result
    nslookup google.com
    >FQDN
    IP Address

    request time out
    couldn't resolve ........


    any suggestions ?
    thank you

  • #2
    Re: DNS strange behavior

    Connectivity issue/dns problems at your ISP perhaps?

    Have you tried OpenDNS?

    Comment


    • #3
      Re: DNS strange behavior

      Are you using Root hints or forwarders on your DNS server?
      Caesar's cipher - 3

      ZKHQ BRX HYHQWXDOOB GHFLSKHU WKLV BRX ZLOO UHDOLVH LW ZDV D ZDVWH RI WLPH!

      SFX JNRS FC U6 MNGR

      Comment


      • #4
        Re: DNS strange behavior

        no i didn't configure the roothint or the forwards

        Comment


        • #5
          Re: DNS strange behavior

          Hi,

          If root hints and forwarders are empty I am not sure how name resolution is occuring (at the gateway device perhaps)

          I think the root hints are configured automatically although forwarders are used first.

          Within the forward tab, enter your ISP's credentials. You could also use OpenDNS if you wish;

          208.67.222.222
          208.67.220.220

          Also there is a field "number of seconds before forwarder times out" - i think 5 is the standard.

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