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  • Redundant DNS Entries?

    I've tried to ping our domain name (let's say abc.com.au) from the 192.168.10.12 server, and it is trying to reach an old server IP Address that was retired from the network, 192.168.10.13.

    When I look in DNS FLZ under abc.com.au it lists:
    (same as parent folder) Host (A) 169.254.6.21
    (same as parent folder) Host (A) 169.254.206.10
    (same as parent folder) Host (A) 192.168.10.12
    (same as parent folder) Host (A) 192.168.10.13
    (same as parent folder) Host (A) 192.168.10.15

    The current DCs are 192.168.10.12 & 192.168.10.15.

    1. Can I delete the 169.254.6.21, 169.254.206.10 IP addresses? I'm assuming DNS doesn't have these MS IPs for a particular purpose, but was probably left over from the initial build of the DNS Server before IPs were assigned? Would that assumption be right? If I ping them I get "Request timed out".
    (The 1st IP addresses occurs elsewhere as well, I've included details below)

    2. Can I delete the 192.168.10.13 IP address? will this then cause any pings to the abc.com.au domain to look up the address from DNS again and ping one of the correct DCs?

    Thanks for your help.
    __________
    I can also find one of these entries in other locations:
    FLZ - abc.com.au - _msdcs - gc:
    - 169.254.6.21 (as well as the 2 actual DCs)
    FLZ - abc.com.au - DomainDNSZones:
    - 169.254.6.21 (as well as the 2 actual DCs)
    FLZ - abc.com.au - ForestDNSZones:
    - 169.254.6.21 (as well as the 2 actual DCs)
    I've been using this online backup for all my photos, docs, spreadsheets, powerpoints & emails for years now & it works great.
    Go Here for their free 5GB: http://www.idrive.com/p=gavamm
    I upgraded to the Personal Plan for peace of mind for not much more than a cup of coffee.

  • #2
    Re: Redundant DNS Entries?

    Enable scavenging; let the DNS service handle deletion of old records before deleting anything manually.
    Gareth Howells

    BSc (Hons), MBCS, MCP, MCDST, ICCE

    Any advice is given in good faith and without warranty.

    Please give reputation points if somebody has helped you.

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    • #3
      Re: Redundant DNS Entries?

      Thanks for your reply , I've been debating as to how safe Scavenging is as I've not run it before.

      Does it just remove old entries?

      How does it deal with manually added DNS entries? Even if they're not used or old.
      I've been using this online backup for all my photos, docs, spreadsheets, powerpoints & emails for years now & it works great.
      Go Here for their free 5GB: http://www.idrive.com/p=gavamm
      I upgraded to the Personal Plan for peace of mind for not much more than a cup of coffee.

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      • #4
        Re: Redundant DNS Entries?

        Static or manual created records are not deleted.
        Marcel
        Technical Consultant
        Netherlands
        http://www.phetios.com
        http://blog.nessus.nl

        MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
        "No matter how secure, there is always the human factor."

        "Enjoy life today, tomorrow may never come."
        "If you're going through hell, keep going. ~Winston Churchill"

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        • #5
          Re: Redundant DNS Entries?

          Thanks guys
          I'll enable scavenging tomorrow!
          I've been using this online backup for all my photos, docs, spreadsheets, powerpoints & emails for years now & it works great.
          Go Here for their free 5GB: http://www.idrive.com/p=gavamm
          I upgraded to the Personal Plan for peace of mind for not much more than a cup of coffee.

          Comment


          • #6
            Re: Redundant DNS Entries?

            What are your recommendations for "refresh" and "no-refresh" intervals? The default is 7 days for both.
            I've been using this online backup for all my photos, docs, spreadsheets, powerpoints & emails for years now & it works great.
            Go Here for their free 5GB: http://www.idrive.com/p=gavamm
            I upgraded to the Personal Plan for peace of mind for not much more than a cup of coffee.

            Comment


            • #7
              Re: Redundant DNS Entries?

              Sounds reasonable, depending how many clients join / leave your network

              I would try it for a while and see if you need to reduce it
              Tom Jones
              MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
              PhD, MSc, FIAP, MIITT
              IT Trainer / Consultant
              Ossian Ltd
              Scotland

              ** Remember to give credit where credit is due and leave reputation points where appropriate **

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