iptables newbie
I'm taking a crack at iptables for the first time. I don't
understand much about iptables yet (though, I've been reading Oskar
Andreasson's excellent tutorial). It appears that iptables comes
ready to go on Debian Sarge 2.4, though, on my machine it doesn't
work. I just need a nudge to get myself going on this
problem. A link, man page (man iptables was no help), or your
experience in setting up iptables on Debian sarge (Linux 2,4 kernel)
would be greatly appreciated.
Here's my deal:
I've just got mail going on a new server. Now I've got spammers
trying to kill my bandwidth. I plan to get spamassasin and clam
going soon, but for no I'd just like to block these sobs using
iptables, and then get clam and spam assassin going.
if I try to block the aforementioned SOB's ip address on the filter
table (when -t isn't specified it is supposed to go to the filter
table):
# iptables -A INPUT -s 123.45.67.89 -j DROP
I get:
iptables: No chain/target/match by that name
and /etc/rc3.d doesn't seem to show anything about iptables or a firewall:
/etc/rc3.d# ls
S10sysklogd S14ppp S20exim4
S20makedev S20pcmcia S89atd
S91apache2 S99stop-bootlogd
S11klogd S15bind9 S20inetd
S20mysql S20ssh S89cron
S99rmnologin
I tried:
# apt-get install iptables
but iptables is already installed. hmmm. what next? any ideas?
James Gibbon
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