DNS Host Name Issue

Discussion in 'Mac OS X Server, Xserve, and Networking' started by valkman, Apr 28, 2012.

  1. valkman, Apr 28, 2012
    Last edited: Apr 28, 2012

    valkman macrumors newbie

    Oct 14, 2008
    I run a Mac Mini with Snow Leopard Server (10.6.8). It is running on a static IP address hosting web, email and its own DNS. It is running Standalone (No Open Directory). The problem that I'm having is that the DNS hostname is not what I expect and not what I have configured in my DNS settings.

    In my DNS Zones it is configued as:
    y.x.w.in-addr.arpa. Reverse Zone -
    w.x.y.z Reverse Mapping www.mycompany.com.​
    mycompany.com. Primary Zone -
    Web (_http._tcp) Service www.companyname.com.:80
    mail.companyname.com Machine w.x.y.z​
    ns01.companyname.com Machine w.x.y.z​
    ns02.companyname.com Machine w.x.y.z​
    www.companyname.com Machine w.x.y.z​

    When the "w.x.y.z Reverse Mapping www.mycompany.com." line is selected the bottom panel says:
    Resolve w.x.y.z to: www.mycompany.com

    I expect the hostname of my server to be "www.mycompany.com". The SSL security certificate I have installed and working is in that name ("www.mycompany.com"). If I execute "sudo scutil --get HostName" it returns "www.mycompany.com".

    To me, this all looks good. The problem I'm having is that all DNS queries return "mail.mycompany.com" as the DNS name!

    If I execute "sudo changeip -checkhostname" it returns:
    Current HostName = "www.mycompany.com"
    DNS HostName = "mail.mycompany.com"

    As you might expect, "nslookup w.x.y.z" returns:
    z.y.x.w.in-addr.arpa name=mail.mycompany.com

    I really want to fix the DNS name of my server but don't know how. I have restarted DNS several times, and rebooted the server to no avail. Anybody know how to fix this?
  2. belvdr macrumors 603

    Aug 15, 2005
    No longer logging into MR
    You're going to need to give more detail. We need to see the type of each record.

    Can you just post pictures of your forward and reverse zones?
  3. matspekkie macrumors member

    Oct 19, 2010
    wat dns server is it using?? it should use it's own. also i would make use of aliases like following: A record = mail.mycompany.com -> 123.34.45.XXX
    alias www.mycompany.com -> mail.mycompany.com
    MX server.mycompany.com >mail.mycompany.com
    and so on.
    this way all resolves to the one ip if that ever changes you only have to change the A record ip and all is set but you can still set them to other ip's.
  4. valkman, Apr 29, 2012
    Last edited: Apr 29, 2012

    valkman thread starter macrumors newbie

    Oct 14, 2008
    Resolution - mostly

    OK, it turns out that I had not created an "A" record for the actual domain itself. I had created "A" records for mail, the name servers and such but not for the primary domain. After making that change my DNS name from the use of "sudo changeip -checkhostname" came out correct. Also, how I was using nslookup to determine if I had made the correct changes was wrong. For those troubleshooting DNS issues here is what I found:

    Use "dig" instead of "nslookup" for troubleshooting. I'm assuming at this point that nslookup has cached results... ???
    Here is an example:
    "dig any <domain>" shows the correct information (the info I expected)

    "nslookup <domain>" does not, it still shows "mail.mycompany.com" as the DNS name

    But by specifying the name server to query, I do get the expected results from nslookup:
    "nslookup <domain> <my domain nameserver>" does show the correct info!

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