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Thread: External DNS

  1. #1
    shieldfire is offline Intermediate Member
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    Default External DNS

    Hi, me again ...

    In an older thread I found this regarding external DNS servers (not running it on the Zimbra server)

    You do not necessarily have to run BIND on your Zimbra server to get it working, but you do have to have DNS working properly.
    Now, is this still (Zimbra 8.x) valid, and where do I point Zimbra to an external DNS server? Someone point to the relevant doc (if available).

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
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    Default

    Quote Originally Posted by shieldfire View Post
    Now, is this still (Zimbra 8.x) valid, and where do I point Zimbra to an external DNS server? Someone point to the relevant doc (if available).
    You don't "point zimbra" to any DNS servers, they are specified on your Zimbra host installation just the same as you would if Zimbra wasn't on there. If your are, by any chance, behind a NAT router (and possibly firewall) you will need to configure a Split DNS configuration - take a look at the wiki article of the forum threads on that topic. You do need valid DNS A & MX records on Public DNS server for the domain that's hosted on your Zimbra server.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    shieldfire is offline Intermediate Member
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    OK, thanks will check it out.
    Was a long (like 5 years or so) time ago I ran my own Bind server, but it'll get back to me I guess.

  4. #4
    jorgedelacruz.es is offline Special Member
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    Hi shieldfire,
    Quick steps:
    For you internal domain.local (for example)
    You have one server with Zimbra, and other, imagine Active Directory with DNS, you need to create two entries:
    Type A (mail for example) to the internal IP of Zimbra
    Type MX to mail.domain.local

    For have a correct DNS in the Internet, domain.com (for example)
    In a public DNS you need to create:
    Type A (mail.domain.com) to the external IP that do NAT for your Zimbra
    Type MX (mail.domain.com)
    Type TXT "v=spf1 ip4:IPEXTERNAL mx a:mail.domain.com mx ~all"

    I think with this is enought.

    I hope that my explanation is clear.

    Kind regards

  5. #5
    shieldfire is offline Intermediate Member
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    Thanks, after fiddling in spare time - I'm grabbing my Cricket book to check what went wrong ...
    DNS isn't a spare time fiddling thing in my experience =)

  6. #6
    shieldfire is offline Intermediate Member
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    Hmm, I tried setting up the DNS earlier as a slave to another DNS server.
    Thought it didn't work, I made something kind of mistake but no, now - something like 3 hours later I recieved the testmail I sent.
    Anyone having experience with running the Zimbra DNS as a slave? (Of course it could be the polling frequency, as I said - I doing spare time fiddling).

  7. #7
    shieldfire is offline Intermediate Member
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    Re-did it properly with slave DNS setup and it is working properly.

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