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Split DNS Question

Posted on 2009-02-15
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Last Modified: 2012-05-06

Hi Everyone,

I am new to the forum and wondering if some of you could clear a question up regarding split DNS. I have been doing some research as I am setting up an SBS 2008 server.

I am reading the best practices and it says to set up split DNS, I understand what split DNS is. You set up two zones one for external users pointing to the external address and one zone for internal users pointing to the internal IP. (Both the same name)

I have read that you do this to eliminate problems when users are accessing the server externally and internally.

Everyone says thats the way you have to do it, but what I don't understand is why not just set up that domain "remote.domain.com" on an external DNS server. If internal users query that domain name, wouldn't the internal DNS server "domain.local" just query another DNS server for that address like its supposed to? I have tested it and it seems to work? I am quite confused.
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Question by:limestoneFleming
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xactdesign earned 2000 total points
ID: 23647291
Split DNS is a really only needed if you are using the same domain name for your internal and external resources.  Since it seems you are using .local for your internal resources and .com for your external you don't really need to worry about split DNS.

Had you named your internal domain domain.com and register a domain name domain.com, and hosted your own Web servers, then your would need to use split DNS so your internal resources could find your external resources (ie Web site) within your network.

Hope this helps.
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by:limestoneFleming
ID: 23652916
That is exactly what I thought. Thank you for clearing that up for me.
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