Blocked web sites or applications are the result of particular filtering software installed onto workstation computers or the organizations' web proxies. In this case the companies' or schools' administrators impose these restrictions using a firewall to block specific web sites companies or schools deemed not suited to be accessed within their organizations. Firewall and internet filtering software are also used by such countries as China, Iran, United Arab Emirates etc to impose internet censorship.
Whilst it is relatively easy to install internet filtering software and block web sites, unblocking web sites and circumvent the filtering software can sometimes be a demanding task to perform.
There several ways to get around internet restrictions at offices or school, one of the popular avenues to accomplish this is to connect through Virtual Private Network (VPN). This is one of the simplest yet powerful means to work around the filtering software, allowing you to access most if not all blocked web site.
A virtual private network (VPN) is virtual connection made over the Internet or other public networks, allowing remote offices or individual to establish a secure link between the different locations with their organization's network. A VPN works by using the shared public infrastructure while maintaining privacy through security procedures and tunneling protocols such as the Layer Two Tunneling Protocol (L2TP.
Another way to access blocked site is to connect to outside proxy servers. Proxy servers are computer servers dedicated to work around web filtering software installed on the computer or even the firewall that can be accessed through the internet. Your computer connects to a proxy server and the proxy server is the computer that makes the connection with the blocked web site. The proxy server then shows you the contents of the page. You can view the web site and even interact with the web site through the proxy server- even though it is blocked by your computer or firewall. This is achieved because it is not your computer interacting with the web site, but a third party - the proxy server that makes the connection with the blocked site.
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