I followed the guide at http://doxfer.webmin.com/Webmin/SquidProxyServer and I am trying to set up a Squid proxy server, but I get the follow error when I try and connect through the proxy:
ERROR The requested URL could not be retrieved While trying to retrieve the URL: http://google.com The following error was encountered: Access Denied. Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect. Your cache administrator is webmaster.