> 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.
I see. You want Squid to automatically retry its request after getting an error from the intercepting proxy. Then Henrik's suggestion to use 'prefer_direct on' is probably what you want. Duane W.
