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How to block Ultrasurf/Tor/http tunnel like softwares from squid?
How to block Ultrasurf from squid?
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Re: [squid-users] BLock Http Tunnel from Federico Lombardo on 2003-02-12 (squid-users)
it seems that as long as any port is available for connect tunneling can be done through that port.cache browsing will not be available anymore.some suggest using a bandwidth/connect request monitoring(through logs etc) to directly find person/persons not following the rules & warn them thus eliminating the source of the problem itself.
it seems that as long as any port is available for connect tunneling can be done through that port.cache browsing will not be available anymore.some suggest using a bandwidth/connect request monitoring(through logs etc) to directly find person/persons not following the rules & warn them thus eliminating the source of the problem itself.
Well I'd also like to kniw about the chances of catching / identifying users of these type of applications. Aren't those encrypted?
Can it be monitored?
Can it be monitored?
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if you really want to monitor https connections then i found this:
SQUID transparent SSL interception Dvas0004's Blog
i would advice though to fully understand its implications since i am not familiar with this setup but looks to me that this method can effectively make even confidential https connections(banking etc) exposed(to you/admins of network) or not work correctly.
another way is to use whitelist based https sites only(for blocking not monitoring like above):
*www.safesquid.com/html/portal.php?page=159
SQUID transparent SSL interception Dvas0004's Blog
i would advice though to fully understand its implications since i am not familiar with this setup but looks to me that this method can effectively make even confidential https connections(banking etc) exposed(to you/admins of network) or not work correctly.
another way is to use whitelist based https sites only(for blocking not monitoring like above):
*www.safesquid.com/html/portal.php?page=159