Squidguard bypassed by goolge cache and google translate

spokkioso · Oct 20, 2011, 9:47 AM

Hi,

I have a pfSense 2.0 installed and configured as a firewall / router / proxy for the network in my office.

Squid in transparent mode, and squidguard with shallalist url blacklists and set to deny some lists, including porn, social etc…

Everything seems ok but when I do a search on google for a site in blacklist and the page appears with search results, if I select the "cached copy" or "translate this page" the proxy is bypassed and the blacklisted sites are correctly displayed!

Is there a way to circumvent this problem by using the resources available to pfSense?

thanks

Spk

wallabybob · Oct 20, 2011, 10:36 AM

I guess its hard to distinguish porn out of google cache from a dictionary page out of google cache. Can you easily block google cache or page translations?

You probably should pursue these issues with the squid community and/or google.

spokkioso · Oct 20, 2011, 11:43 AM

Hello,

I can not prevent users from using google translate or google cache.

I thought of the possibility of implementing regular expressions to match a url is forbidden even when translated or cached by google, but i don't know how to do :-\

thanks

Spk

marcelloc · Oct 20, 2011, 12:25 PM

I think it will only work with proxy filters that analyse page content like dansguardian. Squidguard does only checks urls.