Exhibit 30.3 Proxy server circumvents firewall filter (source Wikipedia).
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 30.3 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.
