Employer and school networks, often have restrictions, and firewalls, which prevent access to certain sites, or protocols, simply because they're popular.eg(Myspace). Most traffic is monitored, and while the application is subject to particular situations, the tips can provide a means of private unmonitored access, with a few qualifications, like keylogging programs, after all the work has been done. The page continues with the links to further steps, and can also provide a greater understanding of firewalls, and their weak spots.