DNS Server

itdev · 10-26-2015, 07:17 AM

Hi,
Great day everyone..

I am a newbie to linux with many challenges.
as of now I have configured my centos server to act as dns server to my local network.
Can some one suggest me how to use this dns server to block any type of url except "google.com"
Any help would be greatly appreciated. It is very urgent and important. Please help me.

Thanks in advance.

JeremyBoden · 10-26-2015, 10:59 AM

So that if you did a Google search and tried to follow a link it would fail?
Surely, this is pointless.

jefro · 10-26-2015, 08:52 PM

There are a lot of ways to harden systems. Not sure dns would be an ultimate solution but it might be part of an overall solution.

The best choice might be to use a layer 7+ firewall. Second to that might be to allow only some IP addresses using iptables maybe.

If your example of google is correct then the work not block much. Google acts like it's own resolver.

serverpoint.com · 10-27-2015, 04:06 AM

I think you better to use proxy servers for blocking websites.

salasi · 10-27-2015, 07:11 AM

Quote:

Originally Posted by itdev

Hi,

as of now I have configured my centos server to act as dns server to my local network.
Can some one suggest me how to use this dns server to block any type of url except "google.com".

Well, apart from the objection mentioned above (ie, it is pointless), you do know that, by itself, it is easy to get around? Is this your idea and what are you trying to achieve?