Ransomware blocklist generator for Shorewall (using https://ransomwaretracker.abuse.ch/blocklist/)

ransomware_ipset

#!/bin/bash
# Author: Marco De Benedetto <debe@galliera.it>
#
# Ransomware blocklist for Shorewall using https://ransomwaretracker.abuse.ch/blocklist/
#
# prerequisite:
# 
# /etc/shorewall/blrules:
# blacklog	net:+blacklist	all
# blacklog	all	net:+blacklist
#
# /etc/cron.d/ransomware_bloklist:
# */5 * * * * root /usr/local/bin/ransomware_ipset

# Create blacklist ipset if it does not exist
ipset list blacklist > /dev/null 2>&1 || ipset create blacklist hash:ip
# blacklist_temp shouldn't exist, but anyway...
ipset destroy blacklist_temp > /dev/null 2>&1
ipset create blacklist_temp hash:ip
wget -Nq -P /tmp https://ransomwaretracker.abuse.ch/downloads/RW_IPBL.txt
(while read ip ; do [[ $ip =~ ^[0-9]+\. ]] && ipset add blacklist_temp $ip; done ) < /tmp/RW_IPBL.txt 
ipset swap blacklist_temp blacklist
ipset destroy blacklist_temp > /dev/null 2>&1