As well as blacklisted sites, porn, spam or generally adult content is blocked by firewalls at school or in many corporates. As proxies give access to the blocked sites, they must be blockes as well...
The equation is simple. Proxies are blocked by all web filtering services such as Websense.
Are they other filters than Websense? Of course there are others. No worth to mention them, this is not the debate.
So the tunnel will be blocked by Websense? Yes, unfortunately this actual proxy is very easily categorized as a proxy. It is banned because it contains many proxy related keywords.
Only a domain categorized as 'all public' can pass websense, so the proxies that pass websense are hard to find, except fresh proxies.
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