I go to a school where the internet is censored by Fortiguard. My school just upgraded their system, and I believe there is some sort of DNS hijacking involved.
Whenever I try to change my DNS resolver to Google's (188.8.131.52 or 184.108.40.206) or even Level3's (220.127.116.11), webpages do not load, and accessing Google or any other website through a browser shows up an error just as if I did not have an internet connection. This even happens on non-SSL websites.
Websites only load when I use the default DNS provided by the router (?), in which the DNS resolver's IP starts with 127, so I believe that is a local address.
So, is this DNS Hijacking, or some other practice of censorship? Also, how may I circumvent this?