Duane,The output is generated by my ISP. Costumers have learned that
they can pick some proxy (on port !80) and get to the websites that
are being filtered by my ISP. I wonder if I can do it automatically
for them. I do not want to use a fixed proxy server, say it being
the parent of my cache server. what I want is to use a proxy server
to somehow bypass my isp filtering for the sites it is doing the
filtering. Squid log produced TCP_MISS 403 for these pages. I
want customers access the websites which are not being filter, via
my cache server. Can squid be used, say using acl or so, to work
out my plan?
Its not clear to me which parts of this you control, and which parts you do not. I will assume that all requests go you your Squid cache and that your upstream ISP is using HTTP interception.
You can define a parent cache and forward only certain requests to it. for example, you can sign up to use one of the IRCache proxies (www.ircache.net) and use a Squid configuration such as this:
acl BlockedByISP dstdomain www.example.com acl BlockedByISP dstdomain www.example.net cache_peer parent ny.us.ircache.net 3128 3130 cache_peer_access ny.us.ircache.net allow BlockedByISP never_direct allow BlockedByISP
Duane W.
Your assumtion is right. Any http request goes through my cache server running squid which I control. The ISP is using HTTP interception. The problem is that I am not sure exactly which sites the ISP filters, so I wonder if I can send the filtered http request to a proxy, and the way I squid undrestand that a page is filtered is using my ISP output (what squid receives for a http request). The ISP generates exactly the same message for any filtered page.
S. Mokhtari
