>>4 Still... there is a security policy there for a reason. It is strongly recommended that you get in touch with the network administrators, and find out the reason why, and how you can go about getting this changed. I agree with >>6 that it's a bad idea to go working around this policy. Doing so could get you into lots of trouble.
As for the "google.ca" bit... Are you in Canada at all? I find typing "google.com" here redirects me to "google.com.au" -- in my case, it's nothing to do with access restrictions. I think this is a "feature" of Google.