Results 1 to 4 of 4

Thread: problems with split domain/dns setup

  1. #1
    xkill911 is offline Intermediate Member
    Join Date
    Aug 2009
    Posts
    16
    Rep Power
    6

    Default problems with split domain/dns setup

    hello all. I'm looking into Zimbra as a replacement for our current email setup which is external hosted imap server.

    let me also say that this is my first journey into Linux and setting up a mail server.


    Im running Release 5.0.18_GA_3011.UBUNTU8 UBUNTU8 FOSS edition on Ubuntu Server 8.04 LTS

    I followed the wiki: Ubuntu 8.04 LTS Server (Hardy Heron) Install Guide - Zimbra :: Wiki

    my first question is about Bind9. if i understand correctly. I need that to make dns work behind a NAT. I had started my install that way then realized that I run another webserver behind my NAT. since its not possible to forward port 80 traffic to 2 webservers behind my NAT i scrapped the bind9 stuff and put the zimbra server on a public ip. if there is any way to run 2 webservers behind my NAT(Sonicwall TZ-210) please tell me how cause i'd love to move zimbra back there. so i guess my question about bind9 is do i need it when im using a public IP for reverse dns? cause that seems to be the root of my current problem which is my mail on my test domain is getting rejected as spam at some hosts.


    my second question is about Split domain setup. I followed the wiki but it just left me more confused. I have a domain on the external host now and i want to mirror mail on both server so i can let my users see zimbra in action.

    the external hosted domain is called example.net and mail.example.net. i created zimbra to run on zimbra.example.net. I made an A record on my dns provider(godaddy) as zimbra points to my ip 72.XXX.XXX.85 and the mx record is zimbra points to zimbra.example.net.

    the external hosts records are there too. no A record but the mx is @ points to mail.externalhost.com

    I can send email from user@zimbra.example.net to gmail, hotmail, etc but when i try to send to a user on my external host but bounces back as spam. so went to MX Lookup Tool - Check your DNS MX Records online and checked zimbra.example.net and it says reverse dns is not working. how do i fix that without bind9 and on an public ip?



    sorry so many questions. i love zimbra and linux and want to learn it.

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Location
    Vannes, France
    Posts
    23,586
    Rep Power
    57

    Default

    You need valid DNS A & MX records whether you are behind a NAT router or on a public IP address, as for your reverse DNS you'll need to contact your ISP about getting that fixed.

    I'd suggest you install Zimbra behind the NAT router (follow the Split DNS article) and change it's mode to use ssl (use the zmtlsctl command), that will allow you to forward port 80 traffic to your web serevr and use https for the web UI of zimbra.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    xkill911 is offline Intermediate Member
    Join Date
    Aug 2009
    Posts
    16
    Rep Power
    6

    Default

    Quote Originally Posted by phoenix View Post
    You need valid DNS A & MX records whether you are behind a NAT router or on a public IP address, as for your reverse DNS you'll need to contact your ISP about getting that fixed.
    ahhh! my isp, if i where to move zimbra behind my NAT would i still need to contact my isp to make reserve dns work or would bind9 fix that?

    I'd suggest you install Zimbra behind the NAT router (follow the Split DNS article) and change it's mode to use ssl (use the zmtlsctl command), that will allow you to forward port 80 traffic to your web serevr and use https for the web UI of zimbra.
    doh! i should have known ssl uses different port then 80, thanks for reminding me

  4. #4
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Location
    Vannes, France
    Posts
    23,586
    Rep Power
    57

    Default

    Quote Originally Posted by xkill911 View Post
    ahhh! my isp, if i where to move zimbra behind my NAT would i still need to contact my isp to make reserve dns work or would bind9 fix that?
    Yes, you would because the reverse DNS is attached to your public IP address.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 8
    Last Post: 04-15-2009, 07:00 PM
  2. Replies: 1
    Last Post: 11-05-2008, 09:37 AM
  3. Replies: 2
    Last Post: 05-02-2008, 10:33 PM
  4. Split DNS setup help? Ubuntu and zimbra 4.5RC2.
    By nfear24 in forum Installation
    Replies: 2
    Last Post: 01-11-2007, 07:39 AM
  5. Question about Split Domain setup
    By ericding in forum Administrators
    Replies: 3
    Last Post: 05-05-2006, 05:09 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •