How Proxy Server bypasses Filters and Censorship


Exhibit 20.3   Proxy server circumvents firewall filter (source Wikipedia).

According to Wikipedia, proxy servers or proxies are the most common means of bypassing government censorship, although no more than 3% of net users use any circumvention tools.

Server using IP-based geolocation to restrict its service to a certain country can be accessed using a proxy located in that country.

Exhibit 20.3 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 (school PC) circumvents the firewall and gains access to pages on Facebook.

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