Wireless Networks Thread, Proxy bypass sites regex in Technical; Hi everyone
Recently noticed a lot of attempts by students on the old web-based proxy scripts. Worked out a couple ...
14th July 2008, 05:19 PM #1
Proxy bypass sites regex
Recently noticed a lot of attempts by students on the old web-based proxy scripts. Worked out a couple of regexes to match a some common URL formats. They work fine on our IPCop + URLFilter box. Exmaples:
Full list Updated 22/07/2008
Last edited by webman; 22nd July 2008 at 10:49 AM.
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14th July 2008, 06:27 PM #2
you might find that those rules overblock slightly - certainly for CGI proxy you can be a bit less aggressive in your blocking and still be effective.
14th July 2008, 06:50 PM #3
Would rather overblock than underblock we can always add to white list any site that needs unfiltering. It works and damn well the little bu**ers can't bypass the proxy now. Our ISP have still not managed to sort it out yet!!!
BTW Tom how would you have done it?
14th July 2008, 10:13 PM #4
Give them time
Originally Posted by bossman
14th July 2008, 10:19 PM #5
How long should we give them... decades or millennia?
Originally Posted by Sylv3r
14th July 2008, 10:47 PM #6
We wanted some ports open last week, when we rang up today to chase them the person had closed the job ticket.
Originally Posted by webman
Ports are still not open, but unfortunately now he is now on his holidays so we have to wait for him coming back before the job will get done! It could only happen to us that the "Port Opener" is unavailable as he is on his sun lounger in Spain!
So something as "difficult" as web filtering.....
14th July 2008, 11:15 PM #7
15th July 2008, 09:49 AM #8
bossman: I would have just asked for "more" 0101 etc. - it is pretty much always the same length, i'd definitely look for 3 consecutive 
PHProxy is hard to do via URL only - we do much more in-page on that one. I remember one specific occasion finding a rule accidentally blocked nhs.net which was targetted at phproxy.
I suppose overblocking is far more of a concern for me - if we overblock, it happens to hundreds of thousands of users and I can't guarantee whats in the whitelist!
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