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NT4 domain name with "." - Updates

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  • NT4 domain name with "." - Updates

    Some updats:

    When win2000 and winXP clients logon, they search for KOH.DOMAIN via DNS
    query for SRV records and then when they see there is no answer they
    query for NETBIOS records 1b and 1c (monitored via sniffer).

    I've tried, with an isolated test environment, to upgrade such a
    domain to 2003 and everything went fine. Also clients have been able to
    succesfully logon to new "kohinternational.com" / "KOH.DOMIAN" domain.

    I've also tried to establish a two way trust relationship between a 2003 domain and NT4 domain KOH.DOMAIN and 2003 domain controller, during
    trust establishment had the same behaviour than xp wks, i.e. 2003
    first tried to lookup for _ldap._tcp.koh.domain and then, when they did
    not get any answer, they looked up for 1c and 1b NetBIOS records, via WINS

    In conclusions: it seems that "." dot in name has the same behaviour
    than "_" underscore in name.

    My remaining question is always the same: there could be some issue in future that it seems to be hidden now? ... who can tell !!!

    Does microsoft support such kind of domain name? ... who can tell !!!

    In this case: no news, bad news
    Max

  • #2
    Re: NT4 domain name with "." - Updates

    Argg....

    Names can contain a period (.). However, the name cannot start with a period. The use of non-DNS names with periods is allowed in Microsoft Windows NT. However, periods should not be used in Active Directory domains. If you are upgrading a domain whose NetBIOS name contains a period, change the name by migrating the domain to a new domain structure. Do not use periods in new NetBIOS domain names.
    See the "NetBIOS domain names" section over here:
    http://support.microsoft.com/?kbid=909264
    Guy Teverovsky
    "Smith & Wesson - the original point and click interface"

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    • #3
      Re: NT4 domain name with "." - Updates

      Good find, Guy. For convenience, the relevant statement is:

      The use of non-DNS names with periods is allowed in Microsoft Windows NT. However, periods should not be used in Active Directory domains. If you are upgrading a domain whose NetBIOS name contains a period, change the name by migrating the domain to a new domain structure. Do not use periods in new NetBIOS domain names.

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      • #4
        Re: NT4 domain name with "." - Updates

        Really good find GUY

        Just one thing. Have you realized the publishing date of this article? It makes me think .....
        Max

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        • #5
          Re: NT4 domain name with "." - Updates

          Originally posted by massimo_m
          Just one thing. Have you realized the publishing date of this article? It makes me think .....
          So I'll be damned !

          Actually I stumbled over the KB when catching up at activedir.org mailing list and the topic there had to do with local group name length limitations. I notices the part dealing with domain names only by chance.

          Still makes me wonder... Any MS lurkers here ? come out from wherever you are !
          Guy Teverovsky
          "Smith & Wesson - the original point and click interface"

          Comment


          • #6
            Re: NT4 domain name with "." - Updates

            That date surprised me. When Windows 2003 Server was released I was told about the underscore at the time. I remember this because ALL the school domains in Victoria Australia, (about 6,000 domains) contained an underscore. This must have been published somewhere on MS but under a different article obviously. I initially thought the article was a reprint until I saw the Revision number.
            1 1 was a racehorse.
            2 2 was 1 2.
            1 1 1 1 race 1 day,
            2 2 1 1 2

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