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DNS Specialists please HELP

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  • DNS Specialists please HELP

    DNS specialists please help... I'm not a DNS expert. Allow me to give you the synopsis. I just "inherited” a LAN with 4 DCs (windows 2003+exchange 2003). On all of them is running dns. and dhcp.
    The problem is that the dns does not resolve some of the urls.
    eg. you can browse but you cannot browse can browse but not
    nslookup gives me an error for nonbrowsable urls:
    DNS request timed out.
    timeout was 2 seconds.
    *** Request to ..... timed-out

    I have noticed that all of the DNS servers are SOA for my domain. I think this is wrong.Only one should be SOA. The rest of the dns should be created as secondary zones. No? For now I stopped the 3 of my 4 dns servers, but no result.

    Now I tried to enable forwarders(to my ISP) and it is working but I get errors in dns event log:
    "the dns server is configured to forward to a non-recursive dns server...."
    and I have to disable them...
    What else could be wrong?
    If you need more info let me know.

    Thanks a lot guys

  • #2
    If the zone is AD integrated, each DC will show up as SOA for the zone. This is the correct behavior, as MS DNS zones (when integrated into AD) do not use the standard DNS sychronization process, but rather replicate using the AD replication and hence can MERGE the updates.

    As for the name resolution errors, try disabling the EDNS on W2K3 DNS servers:
    Guy Teverovsky
    "Smith & Wesson - the original point and click interface"


    • #3
      Thans a lot. I figured out just yesterday that each DC will show as SOA for the zone, thanks for the links.
      One more question:
      what is the best DNS assignement for the netcards of the DCs
      All DCs have 2 network cards and now I pointed them to one DNS server which has forwarders from our ISP.I don't know if you understand what I mean, let me explain

      let say: server 1 (DC) has: and as preferred and alternate DNS for both net cards.(and it is itself) and forwarder is ISP DNS
      all other DCs have the same but as forwarders is server 1. Is this correct or should I use as preffered DNS the IP of server 1 and alternate DNS the IP of itself