Simple and flexible firewall for Linux server
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#!/bin/sh
ripedeny_file=/var/tmp/ripe_deny
cd /var/tmp
rm -f $ripedeny_file
GET http://antispam00.evolix.org/spam/ripe.cidr.md5 > ripe.cidr.md5
GET http://antispam00.evolix.org/spam/ripe.cidr > ripe.cidr
for i in CN KR RU; do
grep "^$i|" ripe.cidr >> $ripedeny_file
done
/sbin/iptables -F NEEDRESTRICT
for i in $(cat $ripedeny_file); do
BLOCK=$(echo $i | cut -d"|" -f2)
/sbin/iptables -I NEEDRESTRICT -s $BLOCK -j DROP
done