Hi Enable ip fowarding on Linux box. Change workstations default gateway to LInux Box. If you did the iptables stuff ok, Linux Box will receive packets and foward to cisco router unless they are to port 80. Proxy will not work when sites are in ports diferent than 80 Regards Andre > Hi friends, > > > > I´m trying to set a transparent Proxy on a Cisco 2500 router. My proxy > > is a squid-box running on Mandrake 10.2.I did all the tips described on > > Squid Cache FAQs, but i have no success. My IOS on Cisco is 11.2 . My > > structure is pretty simple: a Local Network with a Squid-Box inside (the > > same IP address of the workstations) and a Cisco as a default gateway.