http://www.wikihow.com/Opt-out-of-DNS-Redirection
I was trying to VPN into work this weekend, and I could not connect to any servers at the office.
The problem was that cox (my ISP) was intercepting all of the DNS requests and sending me to their stupid search page, and the office DNS server never got a chance to answer.
The solution was found at http://www.wikihow.com/Opt-out-of-DNS-Redirection
