Assuming this doesn't violate your network's usage policy, you can redirect all web traffic to pass through your transparent proxies. So when a user in your network explicitly specifies a different proxy (e.g. proxy.isp.com:3128), you can redirect that request to your own proxy using a tool such as iptables.
Since you've already setup a transparent proxy, I assume you've already done some redirecting rules on your router/firewall (to move all web traffic to pass through the proxy). So writing one to catch all outgoing proxy requests should just be another rule. Take note that some proxies may run on non-standard ports (e.g. 4430, 8080, 8000, 8800, etc), so that's kinda hard to catch. Best regards, gino ledesma Quoting Oca Vidal <[EMAIL PROTECTED]>: > Hi everyone! > > i installed ipcop, with squid and dansguardian filtering... running a > transparent proxy. my problem is which i just found out... that i can > specify a proxy in the browser (like my ISPs proxy) and it bypasses my > my squid and dansguardian, i can surf the net without filtering > function... i would like where should catch this problem that all > access to the internet must pass thru my ipcop? > > thanks, > oscar > -- -- Gino LV. Ledesma // Random Programmer's Quip: It works on my machine. -- Philippine Linux Users' Group (PLUG) Mailing List [EMAIL PROTECTED] (#PLUG @ irc.free.net.ph) Official Website: http://plug.linux.org.ph Searchable Archives: http://marc.free.net.ph . To leave, go to http://lists.q-linux.com/mailman/listinfo/plug . Are you a Linux newbie? To join the newbie list, go to http://lists.q-linux.com/mailman/listinfo/ph-linux-newbie
