Hello, i have SQUID 2.7 STABLE 6 running under windows. Squid runs on a dedicated machine and on a other Server (for example, ip: 1.1.1.1) a Internet Traffic Virus Scan application on port 3128 is installed. On the Internet Traffic Virus Scan application is configured a other upstream proxy on port 8080. Here the cache_peer line from my squid.conf: cache_peer 1.1.1.1 parent 3128 0 default no-query no-digest When i access to a website it opens http://auto.search.msn.com/response.asp?... If i configure the hosts file to "localhost 1.1.1.1" and change the cache_peer entry to: cache_peer localhost parent 3128 0 default no-query no-digest the website is able to access. Thanks for your help.