Entries from June 2011

Blocking DNS requests with Shorewall to prevent OpenDNS Bypass

Date June 28, 2011

Here’s a way to block users from using a different DNS address other than your own local DNS server to bypass OpenDNS filtering. I’m currently using Shorewall in an Ubuntu 8.04 LTS server setup as my Firewall, Gateway and DNS, and works nicely. This should also work in 10.04 or other Ubuntu install that has […]