Denying URL's

Maxx762 · 07-06-2005, 03:23 AM

Hi, this is Daniel , Maxx762, I need to know how to deny access to some URL's using my redhat linux 9 box. I have squid proxy server installed and I need to know how to deny the network I have access to some url's such as hotmail.com, warez.com,porn.com and so on. Thanks in advance

rjwilmsi · 07-06-2005, 03:44 PM

Well, there are a few possibilities here:

1) if you need a quick solution then use your hosts file:
put lines like
0.0.0.0 www.hotmail.com
0.0.0.0 www.badsite.com

in the hosts file in the /etc/ folder. You need root access to do this. This works by telling your PC that the IP address of hotmail is 0.0.0.0 when it clearly isn't --> can't connect to hotmail.

2) Use PeerGuardian by adding the IP ranges you want to block to your own list. [http://www.methlabs.org]

3) I imagine this is also possible using IPtables, but I've never tried, so don't know how.

fouldsy · 07-06-2005, 04:46 PM

Within the squid.conf file, you can specify ACL's to block certain sites - http://www.squid-cache.org/Doc/FAQ/FAQ-10.html#ss10.23

Or, something like SquidGuard can easily run alongside Squid allowing you to simply enter required domains or URL's into a text file and have them blocked. It depends on how complicated you want it, or rather, how many sites you expect will end up being blocked. There are loads of content filtering than run alongside Squid. Personally, I use DansGuardian, but check out that first link through the Squid FAQ's for a simply way to block certain sites purely with Squid.