Hi,
transparent proxies work by redirecting traffic designated to the WWW on
port 80 to the internal proxy port (e.g. 3128). The standard products
don't implement redirection of port 443/https as it would break access
to normal HTTPS sites. Nevertheless, it is possible to "proxy" SSL
traffic but only if you use your own certificates and then narrow the
re-direction to only those servers you have a certificate installed in
Squid. That is how SSL accelerators, SSL proxy/reverse-proxy appliances
work. Remember, Squid is primarily a web cache, not really meant for
blocking URLs.
You could also block "facebook.com" via your internal DNS server,
pointing to 127.0.0.1 etc.
Cheers,
Rocco

On 13/07/2011 3:54 PM, Baluku Godfrey wrote:
> Hello,
>
> I've been runing squid as a tranperent proxy on Ubuntu 11.04. I've
> realised lately that it can not block https requests. For example, it
> blocks http://www.facebook.com but to does not block
> https://facebook.com. I perfectly know that configuring SQUID to
> transparently intercept SSL (HTTPS) connections is not possible(some
> websites say so), but is there a way of successfully going around this?
>
> I want some sites to be accesed at specific time.
>
> Thanks.
> -- 
> "Quam minimum  quam diutissime".
> Godfrey Baluku
> *IT Tech*
> Bwindi Community Hospital
> www.bwindihospital.com <http://www.bwindihospital.com>
> KypeID: bmgodie
>
>
>
>
>
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