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Thread: DNS Issues...What am I missing...?

  1. #1
    NoDoze is offline Elite Member
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    Unhappy DNS Issues...What am I missing...?

    sigh...ok I'll try to explain this as clear as I can....

    I have a primary DNS server at 192.168.1.190

    I have a active production zimbra server at 192.168.1.248 with a split DNS setup.

    zimbra resolve.conf
    DNS1=192.168.1.248
    DNS2=192.168.1.190

    When I do a nslookup on the zimbra server it resolves showing the 192.168.1.248 ip which is what it's supposed to do....mail.domain.com@192.168.1.248

    nslookup mail.domain.com
    Server: 192.168.1.248
    Address: 192.168.1.248#53

    Name: mail.domain.com
    Address: 192.168.1.248


    Now I just setup a test zimbra server at 192.168.1.176, it too has a split DNS setup...

    test resolve.conf
    DNS1=192.168.1.176
    DNS2=192.168.1.190

    But when I do an nslookup on the test server it resolves showing the primary DNS server LAN ip AND the mail.domain.com@71.x.x.x the outside ip address...!?!

    nslookup mail.domain.com
    Server: 192.168.1.190
    Address: 192.168.1.190#53

    Name: mail.domain.com
    Address: 71.x.xx.xxx


    What am I missing here? Cause the split DNS setup is identical...besides the LAN ips of 176 and 248... I don't understand why the test server is resolving this way...?

    Thanks!

  2. #2
    NoDoze is offline Elite Member
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    ok, I've assigned a public ip to the test server, but still HAVE not assigned the domain.

    The domain mail.domain.com is pointed to the public ip of the active zimbra server...

    What would happen if I pointed the same mail.domain.com to two different public ips, one public ip of the active zimbra server and the other public ip to the test zimbra server?

    I had a split setup on the test server, but for some reason it's broken. And I don't know why or what I'm missing to get it working again...

    For what it looks like the setups are identical, the existing split DNS and the test split DNS....

    Thanks.

  3. #3
    ArcaneMagus's Avatar
    ArcaneMagus is offline Moderator
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    Double check your /etc/resolv.conf file on the test server. It is using 192.168.1.190 as it's primary name resolution rather then 192.168.1.176.

  4. #4
    NoDoze is offline Elite Member
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    the test server resolve.conf has:

    nameserver 192.167.1.176
    domain localdomain
    search domain.com

  5. #5
    ArcaneMagus's Avatar
    ArcaneMagus is offline Moderator
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    Also try using dig rather then nslookup. nslookup uses it's own internal mechanisms to preform it's lookups. dig uses the system methods and thus is a much better tool for testing things like this.
    Code:
    dig +short mail.domain.com
    would be the equivalent command.

  6. #6
    NoDoze is offline Elite Member
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    [root@mail /]# dig +short mail.domain.com
    ;; connection timed out; no servers could be reached

  7. #7
    ArcaneMagus's Avatar
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    What does that command output without the +short?

  8. #8
    NoDoze is offline Elite Member
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    [root@mail /]# dig +short mail.domain.com
    ;; connection timed out; no servers could be reached
    read above...

  9. #9
    NoDoze is offline Elite Member
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    I swapped nic cards just to be sure it wasn't a hardware issue....LOL

    Still same problem....

  10. #10
    ArcaneMagus's Avatar
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    Well we both should have seen this earlier

    Change
    Code:
    nameserver 192.167.1.176
    to
    Code:
    nameserver 192.168.1.176

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