added script which automatically adds IP addresses which have been reported to be attacking other servers. It will update the IPTables automatically everyday, as well as perform the initial run the first day. As mentioned in #864 on the origin

setup/system.sh

@@ -304,3 +304,8 @@ cp conf/fail2ban/miab-postfix-submission.conf /etc/fail2ban/filter.d/miab-postfi
 cp conf/fail2ban/miab-roundcube.conf /etc/fail2ban/filter.d/miab-roundcube.conf
 
 restart_service fail2ban
+
+# Add Blocklist.de malicious IP Addresses to Daily Crontab
+curl -s https://gist.githubusercontent.com/klepsydra/ecf975984b32b1c8291a/raw > /etc/cron.daily/sync-fail2ban
+chmod a+x /etc/cron.daily/sync-fail2ban
+time /etc/cron.daily/sync-fail2ban