These are the top 3 I know. 99% of proxies dont make it threw these.
You can make a new proxy site and it will blocked in a hour or the next day. Take one of the newest proxies on tech-faq and put threw the blue coat Sitereview, you'll see what I mean. This is becuase the have the word "proxy" in their html = instant block. Now Lightspeed particularly seems to have some staff that manually categorizes them. I guess there probably watching all the popular sources themselves. All of these use, Bots that analyze the html content, 2nd Manually categorization by the staff working for the company having themselves also subscribed to the same venues you promote your proxy on, 3rd Manually categorization by their customers, 4th pattern recognition and lastly IP neighbourhood anayzlize (Has this IP been caught hosting before proxies?)
If you can get threw all these you will have an unblocked proxy (for awhile..) that can be accessed by commercial filters.
- Websense requires a login.