Hey scty Library, I forget your name. I do not have an answer for your question exactly. However, I think I have a solution to the overall problem, and it is here: http://www.lowth.com/LinWiz/1.09/ I use the wizards to create my iptables files. I have a couple of basic files that I use, and then I tweek the appropriate one after copying it to a new install. For people who want a solution fast, the two wizards are great. I hope this helps. Rick On Thu, 12 Aug 2004, scty Library wrote: > I am messing around with iptables, trying to learn how > it works so that I can build my self a router/firewall > and mabey a VPN. Anyway I tried to use a command on my > Desktop CentOS3 machine. > > "iptables -A INPUT -s 127.0.0.1 -p icmp -j DROP" > > now the command seems to have went through because I > didn't get any errors, but when I go to ping 127.0.0.1 > I am getting a response and my packet loss is 0%. It > should be 100% packet loss. > > Can anyone tell me what I am doing wrong. I am not > trying to do anything yet, just want to learn by > exploring.