Blocking internet access on a centos 6 machine

steves504 · 04-21-2015, 10:14 AM

I am currently working on a centos 6 machine that has its network configured, and access to the internet. What I am looking to test is for the machine to still have the same network configured but block access to the internet.

Can I please get some assistance on how to get this done?

Habitual · 04-21-2015, 10:44 AM

I would think that could be achieved by a simple edit of /etc/resolv.conf

steves504 · 04-21-2015, 11:04 AM

Thank you Habitual, I'll try changing that and also my gateway to the internet and see if that gives me what I am looking for.

veerain · 04-21-2015, 12:01 PM

Quote:

Originally Posted by Habitual

I would think that could be achieved by a simple edit of /etc/resolv.conf

You mean removing nameservers? Still users can go on with ip addresses.

jefro · 04-21-2015, 02:56 PM

Get rid of gateway address.

Could go wild and make hosts file only set of ip's allowed. Other firewall rules, block ports and such.

gdr · 04-27-2015, 02:19 PM

Yeah, just add:

/sbin/ip route del default

to /etc/rc.local

unSpawn · 04-27-2015, 03:33 PM

...or you could simply pull the Ethernet cable if any?

Quote:

Originally Posted by steves504

What I am looking to test is for the machine to still have the same network configured but block access to the internet.

Can you explain, preferably in detail, what you're actually trying to test or achieve?