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Limit incoming Mail Rate against Spam Scripts:
== Limit incoming Mail Rate against Spam Scripts ==
edit main.cf and set:
edit main.cf and set:
Result: after 10Mails the sending IP should by blocked!
Result: after 10Mails the sending IP should by blocked!
Add "fail2ban" Log Monitor as second wall protection to kick out bad IP's forever!
Add "fail2ban" Log Monitor as second wall protection to kick out bad IP's forever!
== Automatic Firewall Update ==
edit a Script firewall.sh set:
<pre>
#!/bin/bash
# GET BAD IP'S
cat /var/log/mail.log | grep rejected | cut -d"[" -f3 | cut -d"]" -f1 > /tmp/firewall.txt
# insert to Firewall
while read line; do sudo ufw insert 1 deny from $line to any; done < /tmp/firewall.txt
service ufw restart
exit 0
</pre>
run by cron hourly..