Proxy servers can be used to bypass filters and censorship. Although only a small percentage of internet users use circumvention tools, proxies are the most common means of bypassing government censorship. By using a proxy, a user can access a server that is restricted using IP-based geolocation.
Exhibit 25.3 illustrates how the circumvention works. In this example, a firewall blocks requests from the destination to the Facebook server. By routing the request via a proxy, the user (i.e., School PC) circumvents the firewall and gains access to pages on Facebook.
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