2 Exchange servers on same subnet going though 1 firewall interface - Split DNS?

Posted on 2006-07-08
Last Modified: 2010-03-06
I read a posting of a problem which I am also experiencing but I don't quite understand the solution  I was hoping someone could clarify it for me.


Exchange server domainone.local

Exchange server domaintwo.local

Both handling internal DNS for themselves.

I am getting the error:  unable to bind to the destination server in dns.

Could someone detail for me exactly how the solution was resolved in the previous PAQ.
Question by:kapara
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LVL 104

Accepted Solution

Sembee earned 500 total points
ID: 17064848
Split DNS.

You basically create a dnszone for the other domain.
In this case, as you have two domains on the same subnet, you could create all the information for a domain on the same DNS server, then allow zone transfers. On the other domain, configure a new secondary zone and point it at the server that holds the information. Only need to maintain one set of data then - rather than two copies of the DNS zone.


Author Comment

ID: 17065289
Are you talking about creating a primary for the external names for the server internally?

Existing Zone:  Active Directory Integrated:   Ex. exchange.mydomain.local

Do you need me to create the following:

Primary Zone:


LVL 104

Expert Comment

ID: 17065343
You need to create a primary zone of
Then put the MX records, hosts etc in to that zone. As you are creating a zone for that domain, it will also have to include any external hosts - web sites, ftp sites etc.


Author Comment

ID: 17065503
But I will point the External names to internal IP's.  Correct?

LVL 104

Expert Comment

ID: 17065679
So that when any machine inside the network does a DNS lookup it gets the internal IP address... inside outside


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