A little information on the program used by the Calgary (Canada) Public Schools to block indecent material.
The program is carried out with an "iPrism" internet filter. The masters have set parameters to suit their needs. There are daily updates.
It is designed to block websites, words or categories on which filtering is desired. Teachers are not a party to the parameters, which are only given out in general form.
Teachers working on research (e. g. breast cancer, etc.), can get exemption by applying for it.

The ENTIRE website is evaluated, not just the home or title page. My informant says the filter cuts in if any word, dialogue or prohibited website is encountered, and is in effect for the entire website. The masters can program to block any website they deem inappropriate.

In other words, Mudcat can do nothing to stop the filtering of its website.

The Calgary Catholic School System (also public here) has filtering, but I have no information. (Calgary has a metropolitan population of over one million).

"IPrism" hardware is US$2195, plus subscription fee for software upgrades and daily database updates.


Some state offices and businesses use these systems to prevent non-business use.