Aug 9, 2011
tom
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How does an internal DNS server work in relation to our local servers and domain names?

Question

How can an internal DNS server work in relation to a domain name we currently own?

If my company’s website is example.com and it currently points to a DNS server elsewhere that points to the website’s server, also elsewhere… how does it work to set up locally available addresses?

For example: We have 3 development servers and 3 staging servers. I would like each to point to:

something.example.com 
somethingelse.example.com
etc...

However this only needs to be available locally, each available on… 192.168.0.XXX

Note: I doubt I can point the external DNS server back to my local servers since I do not have a static IP to address these properly.

Is this possible to set up? How does it work, conceptually? Any information on the subject that could help me understand this would be greatly appreciated.

Answer

What you need to set up (called by any other name) is split horizon DNS.

http://en.wikipedia.org/wiki/Split-horizon_DNS

Check more discussion of this question.

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