Hi I have a server setup with SQUID for 6 users, these users do use the same system on which squid is installed. Now my problem is that I want to force all their traffic through SQUID. So I did setup the following iptable rule on the server : iptables -t nat -I OUTPUT -p tcp --dport 80 -j DNAT --to 192.168.0.165:3128 Where 192.168.0.165 is the squid server and the server the users use. When a user tried to access a denied site, he gets access denied. When he tried to access a white listed site he gets : * Unable to forward this request at this time. Full error http://pastebin.com/ZVz1EGMr However, when a user puts the proxy in browser "after I remove iptable rule" all works fine. I did check always_direct, never_direct and the other stuff. Right now I am clueless. This is CentOS 5.5 with SQUID 2.6 Regards