Multiple DNS servers confusion!

Assembled / N/A
March 16, 2014 at 08:06:00
Specs: Windows 7 Professional, 2.8 Core 2 Duo/ 4GB Ram
Dear all,

I am confused and looking for help,
I have 4 different IP ranges as following:
192.168.30.xx subnet: 255.255.255.0 dedicated for a system to work from outside our network.
162.164.80.xx subnet: 255.255.255.0 dedicated for a system to work from outside our network.
10.3.88.xx subnet: 255.255.255.0 dedicated for a system to work from outside our network.
192.168.25.xx subnet: 255.255.255.0 this is for our domain network.
each range has its own default gateway, but only one system has two dns servers and the others don't need DNS server except my domain network, and they are working fine, but once I add my domain network DNS and the IP address of my network one of the systems stops working.

Any idea why is this happening?

If you need any additional information please ask.

Thank you in advance..

message edited by seraj


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#1
March 16, 2014 at 15:27:51
but only one system has two dns servers and the others don't need DNS server except my domain network, and they are working fine

The above is unclear.

The term "system" usually means one specific computer but I suspect you're not using it correctly. Do you mean instead "network" as in one of the networks you listed above that is not your "domain network"?

but once I add my domain network DNS and the IP address of my network one of the systems stops working

What are you adding the DNS address to, a computer or all the computers in another of your networks?

Your domain DNS is required for domain clients so they can authenticate to the DC. Two DNS addresses are not required for this and the DNS address should be the DC's LAN address in the case of your domain.

What is the second DNS address you're using and why are you using it?

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#2
March 16, 2014 at 21:03:41
"but only one system has two dns servers and the others don't need DNS server except my domain network"

All system must have dns servers if wanting to be on the internet.

In a domain you must have a local dns server for local name resolution and it must have its forwarders configured [pointing to valid internet dns servers] properly for workstations to get internet.

Usually every network has two dns servers, the primary and then a backup. In the case of a small domain you would have your dns server as primary and a internet based dns server as secondary.

Question I have are what system are you making changes on? Certainly not on your domain network with leaves one of the three.

From what I can tell from your description these other networks are for your remote access. None of them should have your local domain dns server listed. They can't reach it.

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


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#3
March 17, 2014 at 02:05:44
Thank you both for your answers and help, let me be more clear as requested.

By "systems" I mean applications that we communicate with remotely, by adding their ip range to each nic settings on each machine that require to run those applications, and their ip ranges are different from our domain network range.

One of those applications in order to run, requires that we enter its dns manually on each workstation that requires running this application, and it works perfectly, until I add my local dns server for my domain controller, the application stops working immediately.

For more clarification please let me know, it is important for me to finish this task as I have other tasks pending.

Cheers


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#4
March 17, 2014 at 07:26:15
I'm still confused.

In my world, a "system" is a computer (ie: hardware) and a application is a program (ie: software) that you run on a computer.

By remote do you mean, a computer located in another physical location removed from your "domain network"

I'm guessing whatever it is you're doing, you're doing from the "domain network", is this correct?

What application is it you're speaking of? Perhaps if one of us has some experience we may be able to make more sense out of what you're describing.

Is it being run locally on your "domain network computer"? Or do you run it remotely on other computers in the other networks?

Do you connect to the remote computer and then run the software on the remote PC, or do you run it on a local PC and the application itself goes out and connects to another instance of the application on a remote computer?

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#5
March 17, 2014 at 08:07:51
which of the 3 external networks are you adding the domain dns entry to?
and why?

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


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#6
March 22, 2014 at 11:56:43
Sorry folks it took me such long time to inform you, that I have solved this issue.
Thank you very much for your help.

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