4 DNS servers, 2 subnets, 1 domain name?

Discussion in 'DNS Server' started by matija., Sep 28, 2006.

  1. matija.

    matija. Guest

    This is kind of newbie question... I googled about this scenario,
    but with no results :(

    Lets say I have fictivedomain.com registered with ns1.fictivedomain.com
    ( and ns2.fictivedomain.com ( that serve as
    Primary DNS servers on machine #1.

    Recently I acquired machine #2 on completely different subnet and now I
    want to setup ns3.fictivedomain.com ( and
    ns4.fictivedomain.com ( on this machine #2, and I want them
    to serve as Primary DNS servers as well (I plan to shut down machine #1

    So far, I have:

    - installed MS DNS onto Win2003 SE
    - created ns3 and ns4 host names (Record Type A) with associated IP
    addresses ( and in fictivedomain.com host records;
    - Windows TCP/IP properties -> DNS server addresses are set to and;
    - MS DNS set to listen to all IP addresses (got 4 of them on machine)
    - created Primary Forward and Reverse Lookup Zones

    Forward Lookup Zone screenshot:

    Reverse Lookup Zone screenshot:

    - tested DNS with DNSTester and the results were okay (server responded)

    The problem? When I try to modify DNS settings in client's .com domain,
    and enter ns3.fictivedomain.com and ns4.fictivedomain.com, it returns
    error every time and values are not saved. If I try to enter ns1 or ns2,
    then it goes trough...

    Hope I didn't complicate it... Any help appreciated. Thanks!

    matija., Sep 28, 2006
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  2. It sounds like you have 4 different servers, all with fictivedomain.com
    configured as a primary zone. Is that your setup?

    What error exactly are you seeing? If you have sufficient rights to
    configure DNS in TCP/IP properties, you should be able to enter any valid IP
    Greg Lindsay [MSFT], Sep 28, 2006
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  3. matija.

    matija. Guest

    I have 1 DNS server (with ns1 and ns2) on one machine, and now I've
    setup 2nd DNS server (with ns3 and ns4) on second machine. DNS servers
    on both machines are configured as a primary zone.
    As I'm modifiying DNS settings of .com domain from within registrar's
    interface, I only get "(1241) DNS modification failed.1" whenever I
    input ns3 and ns4... If I input ns1 and ns2, then it doesn't give error.
    I've sent a support ticket to registrar to find out more about this error.

    In meanwhile, I've tested my DNS (dnsmgmt -> ServerName -> Properties ->
    Monitoring -> Test) and both results are "Pass".
    Is there any other way to test whether my ns3 and ns4 are working properly?

    Anyway, thanks for replying.

    matija., Sep 28, 2006
  4. matija.

    matija. Guest

    Problem solved:
    I haven't registered my new nameservers with registrar... Now, it's
    working properly... sorry I took your time, and thanks for help Greg.

    matija., Sep 29, 2006
  5. Sure, no problem. I'm glad you figured it out.

    Just a suggestion, but with your setup, you might want to register the
    domain with ns1 and ns3 or ns2 and ns4. That way you have failover in case
    one of the servers has a problem.

    You could also consider making one of the servers a primary and the other
    one a slave. Then, if you need to make a change in the domain, you only
    need to change it on the primary.

    Good luck!
    Greg Lindsay [MSFT], Sep 29, 2006
  6. matija.

    matija. Guest

    Thanks for your suggestion, I will definately do that, but... as I said,
    ns1 and ns2 will be shut down in a few weeks and when I create new name
    servers, I'll go with primary and secondary zones.


    matija., Sep 29, 2006
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