Hey scty Library,

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.

Oops! I forgot about that.

The LinWiz iptables wizards cannot help you, a router/firewall/VPN application is too complicated for them.

If you do not care about reinventing the wheel, then proceed with your learning experience.

If you just want a router/firewall/VPN, look at Smoothwall. A mountain of effort and expertise has been put into that dedicated firewall distribution, and I suspect there is NO WAY anything you could do on your own could come close.

But if your purpose is to have a learning experience, then you are on the right track.

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.