I had the same problem,
and after some discussion with the experts
I believe there's nothing we can do to block user
for using another http-proxy-service.
The best thing I can do is to add "proxy" phrase
in my regex, it blocks many http-proxy-service.
and because my ISP is in Indonesia,
user will have a severe performance when they're using
such http-proxy-service since most of them are located in US
:-)
------------------------
Nyoman Bogi Aditya Karna
IM Telkom
http://imtelkom.ac.id
------------------------
--- On Sun, 7/12/09, Roland Roland <R_O_L_A_N_D@xxxxxxxxxxx> wrote:
> From: Roland Roland <R_O_L_A_N_D@xxxxxxxxxxx>
> Subject: users bypassing rules.. Help!?
> To: squid-users@xxxxxxxxxxxxxxx
> Date: Sunday, July 12, 2009, 12:21 PM
> Hello,
>
> for a while now.. almost 3 weeks I've been using an ACL tht
> matches a specific file content with url_regex
> in this file there's facebook, and a few other sites that I
> don't want users to access.
>
> users have found a way to bypass these restrictions
> by using online sites that supports such a thing.. like
> using google translate service to translate sites which by
> default would be blocked..
> or simply using other online websites that masks such a
> usage...
>
>
> anyone has a better way for me to block such sites?
>
> thanks in advance,
>
> Roland
>
