my Squid server machine had two interfaces eth0 for LAN eth1 connected directly to router for internet access. In my current scenarion my Squid box has only one NIC and it is behind PIX firewall , its local ip 172.16.100.12 is mapped with real ip so that it can get internet access. So its internet and interanet communication is held vi signle LAN card. On pix there is ni filter for pix. So is there any special configuration to be made at PIX end so that it should allow squid to work in transparent mode. Regards Linux Cablez __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com