A script to download bad IP addresses and deny them with UFW

ufw-denier.sh

#!/bin/bash

TMP_DIR="/tmp"
URL_LINKS=$"http://www.blocklist.de/lists/ssh.txt
http://www.blocklist.de/lists/apache.txt
http://www.blocklist.de/lists/asterisk.txt
http://www.blocklist.de/lists/bots.txt
http://www.blocklist.de/lists/courierimap.txt
http://www.blocklist.de/lists/courierpop3.txt
http://www.blocklist.de/lists/email.txt
http://www.blocklist.de/lists/ftp.txt
http://www.blocklist.de/lists/imap.txt
http://www.blocklist.de/lists/ircbot.txt
http://www.blocklist.de/lists/pop3.txt
http://www.blocklist.de/lists/postfix.txt
http://www.blocklist.de/lists/proftpd.txt
http://www.blocklist.de/lists/sip.txt
http://www.ciarmy.com/list/ci-badguys.txt
http://charles.the-haleys.org/ssh_dico_attack_hdeny_format.php/hostsdeny.txt
http://www.nothink.org/blacklist/blacklist_ssh_day.txt
http://malc0de.com/bl/IP_Blacklist.txt
http://www.nothink.org/blacklist/blacklist_malware_dns.txt
http://www.nothink.org/blacklist/blacklist_malware_http.txt
http://www.nothink.org/blacklist/blacklist_malware_irc.txt"


function denyHost() {
  sudo ufw deny from $1;
}

function getLists() {
  if [[ ! -d "${BACKUP_DIR}" ]]; then
    mkdir -p "${BACKUP_DIR}";
  fi;
  for line in echo ${URL_LINKS}; do
    filename=$(python -c 'import string; import random; acc=string.ascii_letters; d=["".join([random.choice(acc) for _ in range(1)]) for _ in range(7)]; print("".join(d))')
    writeTo="${TMP_DIR}/${filename}.deny";
    touch $writeTo;
    curl -o "${writeTo}" $line;
    while read item; do
      denyHost $item;
    done < "${writeTo}";
  done;
}

getLists;

now i dont have much time, but maybe in the future i will fork something more efficient taking your code as a base ;)