Internal/External domain name the same - Not a big deal

J

John

I have been reading these boards for a while now and have found many
posts on folks with questions regarding their internal and external
domain/DNS name being the same.

I too am in the process of upgrading my domain to AD from NT 4. I have
about 100 workstations/servers all in the same domain. Things have
been working fine for me for years but it is time to upgrade... My Web
Site as with many others is hosted off site and they also host my
external DNS with the entries for my MX and WWW resolution on the
internet.

I've read some stuff that says when upgrading to AD from NT 4.0 you
should be creating a sub-domain internally so as to avoid conflicts
with your externally hosted DNS.

In the end the only real isues I have found is that since there is now
an Internal DNS setup you will need to create local entries for www
resolotion on your mail server. I've read some people saying this wil
cause problems if you ever move the servers (blah, blah) but in
reality I have had the same IP addresses on my external web site for
over 6 years. It's not like there is 20 things to do if I ever have to
change this external address, it is just one simple ip change in the
host record.

To me, if you are setting up a new domain from scratch it makes sense
to create a subdomain for your internal purposes but if you already
have an existing domain used internally and externally - you'll be
better off leaving it as is and just modifying the internal DNS with
that 1-2 entries.

I do not want have to reconfigure every single server and client to
point to a new domain just for that reason.

Does that make sense to anyone - DO you agree with me? IS there
something that I am overlooking here with doing it this way? Please
post your comments..


-John Sullivan
 
L

Lanwench [MVP - Exchange]

I have many networks running "split brain DNS" and have had no problems
whatsoever. The only time you might run into problems is if your external
web hosting account is a dynamic IP on a shared server...but I haven't run
into it.
 

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