Rather than all these complex answers with proxys and this and that, there's a very simple way to get pass schools' fortinet fortiguard.
The solution: Google Translate.
Just enter whatever site you want to go to into google translate and it'll work.
Unfortunately it doesn't work now, the google translation has been blocked also by fortiguard.
just use proxy sites or proxy software's to reach the desired web site
This depends a lot on which method that has been used to block facebook. You might get in trouble if you manage to bypass this blocade. I am sure that if you can legitimate your use of facebook, then your network manager will make this possible/available to you.
The best "service" that I see that fits the bill is an online email account. My opinion is that gmail is the best of these services but there are many others like hotmail (live, bing, etc.), aol, yahoo, myspace - there's got to be a million different ones. The email never changes, no deleting is necessary, and spam is automatically filtered. An account can be used for just the purpose of getting that "update," and nothing else. An account can be created for any purpose.
you can download sportplux
Fortiguard web filter works by filtering URLs based on global data. The problem with this is that it may block websites that shouldn't be blocked. Fortiguard cannot be disabled, but you can bypass it with an SSH SOCKS proxy that points to another remote destination.
Fortinet was created in 2000.
Fortinet's population is 32,011.
Nothing that fortiguard will let you access.
just hack it with a disc.
FortiGuard offers a variety of software through its client FortiClient. This includes anti-virus software, web filtering software, and app firewall software.
A simple solution by using HTTP-Tunnel v4.4.4000[.exe](176kB) software.-----------------------------------------------------------------------------------------------------well if it doesnt work you can use other softwares also like ultrasurf new versiton,freegate,your-freedom and many other ways are also there..visit http://www.mgingerhack.blogspot.com for all the information to bypass any kind of filter.
download hotspot shield
Try using The Onion Router (TOR project)
Try my site, www.fundoctor.org
bad news for you, i have that firewall too, and i cant access anywhere, in fortiguard page, in somewhere there is a link to write what type of webpage is an address, i did it with motorolac650.tk, cause it was blocked, i found that and in the description I put it like a forum and information page, and after 24 hours it was unlocked.