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Thread: [SOLVED] MX record not found

  1. #1
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    Default [SOLVED] MX record not found

    Problem and setup are described in this thread.

    We too serve users inside the LAN and send and receive mail from the internet. This is why our server is in the LAN.

    We have a public IP and a public MX record for our Zimbra server. The server sits on the LAN behind a Firewall/NAT. Port forwarding is used to direct all needed ports (SMTP/IMAP4/POP3/etc.) to the Zimbra server.

    We are trying to install the Zimbra server but failing at the MX record check in the install script. The installer checks for an MX record but receives the public IP of the Zimbra server. Since the server has a private IP the check fails and the installation quits.

    How can we install Zimbra servers behind a NAT?

    Thanks very much!
    Last edited by ECB; 03-05-2009 at 07:25 AM. Reason: Change of title

  2. #2
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    You will require a Split DNS architecture.

    Also, please update your profile with the output from
    Code:
    su - zimbra
    zmcontrol -v

  3. #3
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    Quote Originally Posted by uxbod View Post
    ECB please stop opening old threads by posting to them
    All forums I come from ask to always use old threads first and open a new post only when necessary. No need to shout.

    The article you kindly forwarded me to states that this technique should not be used when setting up a multi server environment. However, we are trying to set up a multi server environment where all servers are connected via VPN and the MTA's serve both inside and outside users (meaning all MTA servers are behind a NAT/Firewall).

    Thanks again.

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    Quote Originally Posted by ECB View Post
    No need to shout.
    Was not a shout just a quiet request; especially as I had already opened up the thread for you

    Quote Originally Posted by ECB View Post
    The article you kindly forwarded me to states that this technique should not be used when setting up a multi server environment. However, we are trying to set up a multi server environment where all servers are connected via VPN and the MTA's serve both inside and outside users (meaning all MTA servers are behind a NAT/Firewall).
    So are you using the Network Edition version of ZCS ?? or just setting up multiple FOSS servers ?

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    I'm using the Network Edition with a trial license.
    We are evaluating ZCS and already solved most issues we've encountered.

    Our environment consists of multiple worldwide locations connected to each other via VPN. We want to deploy one multi server environment encompassing all locations.
    Last edited by ECB; 02-25-2009 at 04:54 AM.

  6. #6
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    Okay, so do you not have a internal DNS server on your LAN ?

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    We do have an internal server in our LAN, but again, the Split DNS article states that the Split DNS method should not be used in a multi server environment.
    This should not be used for a multi-node Zimbra installation, and should not be used as the DNS server for any other hosts on your network.
    In that case, what would be the method for a multi server installation?
    Last edited by ECB; 02-25-2009 at 05:10 AM.

  8. #8
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    Add a MX record for your domain to the internal DNS. Then all the servers within your multi setup will be able to look it up. Also, ensure that each server within the setup has a A record within your local DNS aswell.

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    Thanks - will try!

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    Update:

    First of all, we're still evaluating Zimbra. We are not in production yet.

    We designated one computer to serve as the test Zimbra server. This computer is sitting in the LAN and has a public IP, a public A record and a public MX record.
    All records are resolvable from the internet and from the LAN and firewall configuration has been made to allow the Zimbra server to send and receive mail to and from the inside.

    We installed a DNS server in the Zimbra test computer (bind9) and added the copmuter's internal IP address in an A record. We also added an internal MX record.

    Installation runs fine, but we are unable to send mail to the outside.
    This is the message we see in the mail queue:
    ECB_Error.jpg
    Last edited by ECB; 02-26-2009 at 05:41 AM.

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