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How to configurate  DNS server to work virtually with 3 servers, , and only 1 public IP address available?

Posted on 2004-04-12
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Last Modified: 2010-03-18
I have 3 servers, 1 router w/swich, 1 public IP address, and DNS application running on the server.

Is it possible to configurate the DNS to work with this, and how do I do it?
One of servers is runing Linux, other two win 2k.

Vernes
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Question by:Vernes
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8 Comments
 
LVL 31

Expert Comment

by:Gareth Gudger
ID: 10804898
There are a couple of ways to do this. What apps are running on each server? For example if one is to be a web server and another an email server you can easily just forward port 25 to one and port 80 to the other.

If they are all to be web servers then you need to forward all requests to the DNS server where it can them resolve the web address to the correct internal IP.
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Author Comment

by:Vernes
ID: 10804985
They are all web servers. The DNS app is runnnig on one of these 3!
Is it a problem?

Vernes
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LVL 31

Expert Comment

by:Gareth Gudger
ID: 10805019
No just forward traffic from your router to the machine hosting the DNS service. Then the DNS service will resolve their hostnames/domain names to their local IP address on your network. In the internet domain registar simply point all your registered domain names at the same IP.
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Author Comment

by:Vernes
ID: 10805079
Question:
<<In the internet domain registar simply point all your registered domain names at the same IP.>>
Why? There are ca 60 domains in total, and I will divide them on 3 servers. But there will be 3 different servers, and 3 IP addresses. Why use the same ip?
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Accepted Solution

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Gareth Gudger earned 100 total points
ID: 10805106
Because you only have one public IP address. The domain registrar is the public domain name reolsution authority I was referring to (like InterNIC or register.com). The 60 domain names registered on the internet will resolve to your public IP (your network) which will be sent to the router, forwarded to DNS and resolve the the separate private IPs.
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Author Comment

by:Vernes
ID: 10805364
Ok, I shall try it.
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Author Comment

by:Vernes
ID: 10806794
I am using DNS software on win 2000 server. If I add 192.168...... instead of my public IP, then no page is found.

How exactly to do it?

vernes
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