Create a private network with the same or similar domain name

I own my domain name and it is registered through an external host provider for my website. I would like to create a private network with the same or similar domain name without causing conflicts with my existing domain host and not have problems qualifying the name. How should I address this and/or is it possible. I will be using various free server platforms and computers. They will all have internet access, (although some might remain isolated members of the active directory for testing purposes).

My example domain name:

Can I use names such as;

or should i just choose some other name and later deal with attempting to migrate or cluster servers.

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by gdeangelis In reply to Create a private network ...

You can use Companies do this all the time. Your site should be protected from the internet and in a dmz. This is assuming you are not using the website's server for authentication-a/d for your internal domain. That would not be advisable.
You won't have any problems with name resolution, because that is done externally through the company hosting your records on the outside, so to speak. Internally, your server, if on the same domain, would have its own internal host record, independent of the external dns.

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Yes it is possible

by vovokorp In reply to Create a private network ...

You can create a private network by using a dedicated server provided by .The full server will be dedicated to you so that you can create your own private network.

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If Active Directory then use separate zone

by JPElectron In reply to Create a private network ...

Let's say your public domain (website) is:

You should avoid using just that for any internal active directory network (it will cause you problems later on with DNS names, and possibly leak internal FQDN/records to the Internet which is a security risk).

When setting up active directory you can still use your public domain, but the AD should be a separate zone, this is often referred to as NetBios domain name, or pre-Windows 2000 domain name, for example... or

You can also use any of the following non-public and un-registerable root domains like...


...or with a NetBios domain...


In any case, the second "zone" (really a sub-domain) is what will show up in the "logon to" drop-down box at CTRL+ALT+DEL, for example...

FQDN: Logon domain: INTERNAL
Full computer names:,,, etc.

FQDN: newco.example Logon domain: NEWCO
Full computer names: pc1.newco.example, pc2.newco.example, server5.newco.example

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