Configuring two zimbra mail server within LAN with split DNS

[emnzava]

Dear,

I have configured first mail server and now it's working fine with OpenDKIM, split DNS.

Thank you all for helping me out with advice mostly Phoenix and others.

Now i want to configure second mail server behind NAT (same as the first one) but this server will have different name (mail2.mydomain.com).

How can i configure split DNS so that mail2.mydomain.com can be added to the Bind configuration files?

Here are three files that i need to change for the second server. Do i have to replace every mail with mail2?

In my public DNS record mx is mail.mydomain.com.

Here are my current configuration for the three files that i need to change.

sudo nano /etc/bind/db.mydomain.com
;
; BIND data file for homedomain.org
;
$TTL      604800
@          IN      SOA     mail.mydomain.com. admin.mydomain.com. (
                                   070727         ; Serial
                                   604800         ; Refresh
                                   86400          ; Retry
                                   2419200        ; Expire
                                   604800 )       ; Negative Cache TTL
;
@         IN     NS         mail
          IN     MX      10 mail
          IN     A          192.168.0.5
mail      IN     A          192.168.0.5


#sudo nano /etc/bind/db.0.168.192
$TTL 3D
@          IN          SOA     mail.mydomain.com. admin.mydomain.com. (
                                       2       ; Serial
                                       8H      ; Refresh
                                       2H      ; Retry
                                       4W      ; Expire
                                       1D)     ; Minimum TTL
                        NS     mail.mydomain.com.
10                      PTR    mail.mydomain.com.

#sudo nano /etc/bind/db.0.0.127
$TTL 3D
@               IN      SOA    mail.mydomain.com. admin.mydomain.com. (
                               2       ; Serial
                               8H      ; Refresh
                               2H      ; Retry
                               4W      ; Expire
                               1D)     ; Minimum TTL
                        NS     mail.mydomain.com.
1                       PTR    localhost.

Thanx in advance.

[phoenix]

Is this just a second server in the same domain with a different priority? What is the role of this server going to be, a backup perhaps?

I don't actually like the layout of those DNS records, I prefer to explicitly list the domains and servers like this:

sudo nano /etc/bind/db.mydomain.com
;
; BIND data file for homedomain.org
;
$TTL      604800
domain.com.          IN      SOA     mail.mydomain.com. admin.mydomain.com. (
                                   070727         ; Serial
                                   604800         ; Refresh
                                   86400          ; Retry
                                   2419200        ; Expire
                                   604800 )       ; Negative Cache TTL
;
domain.com.               IN     NS         ns1.domain.com
domain.com.               IN     MX      10 mail1.domain.com.
domain.com.               IN     MX      20 mail2.domain.com.
domain.com.               IN     A          192.168.0.5
mail1.domain.com.         IN     A          192.168.0.5
mail2.domain.com.         IN     A          192.168.0.10
ns1.domain.com            IN     A          192.168.0.5

If this is a new server in a different domain then just create new bind configuration files for that domain and add the records to point to the new server.

[emnzava]

Yes, this is a second server in the same domain. My aim is to create a backup server.

I took the layout of DNS record in this how to for zimbra 7 on ubuntu 10.04 64bit Zimbra 7.0.0 installation on Ubuntu 10.04 Server » Open Source Explorations

So if i got correctly in both server i have to explicitly list servers like you did on your example for /etc/bind/db.mydomain.com?

What about /etc/bind/db.0.168.192 file. can it stay the same way i've created.

[phoenix]

Originally Posted by emnzava

So if i got correctly in both server i have to explicitly list servers like you did on your example for /etc/bind/db.mydomain.com?

That's just my preferred method of naming the records but, yes, you need to add them in that format.

Originally Posted by emnzava

What about /etc/bind/db.0.168.192 file. can it stay the same way i've created.

That should continue to work OK but you might want to change the NS records to the same format as the ones I've listed, just for consistency - it's your choice.

Don't forget to make a copy of the original files before you make any changes just in case you have a problem. You can obviously check the new records using the 'Verify...' section of the Split DNS article.

[emnzava]

Thanks,

Let me try your option and see the output. Will keep you posted.

Thanx.