Iptables on Devil Linux Router box

[Stino]

Hello,

I'm quite new on linux distro's but I've got an old P1 166Mhz running a Devil Linux Distro.
It boots on CD-ROM and writes its conf. file to a floppy...

I'm trying to get myself into the firewall thingy iptables but don't get it to work... If I type the command for appending a new rule, it doesn't give me an error, but it doesn't apply the rule?
If I check with iptables -L it only shows the default iptables. Nothing changed...

I was trying with this rule...
iptables -A INPUT -s 127.0.0.1 -p icmp -j DROP
just to see if it would work... but no luck...

Can anyone help me?

[LinuxFreak]

Dear Stino,
Salam,

Check weather iptables service is starting by it self or not ?

# iptables -I INPUT -s 127.0.0.1 -p icmp -j DROP
# iptables-save

Best Regards.