[squid-users] Block VPN access like hola.org ,ultrasurf

[Reet Vyas]

Hi,

I have working trasparent squid , Some users are using proxy vpn in
moziilla as addon and bypassing my squid, Please tell me how to block all
hola.org vpn and ulrta surf, I have already blocked websites,but seems not
working.

Please let me know how to block these vpn access.
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