- ai fail2ban
- fail2ban-client status
- fail2ban-client status postfix
- fail2ban-client set postfix unbanip IP
- fail2ban-regex /var/log/mail.warn /etc/fail2ban/filter.d/postfix.conf
- fail2ban-regex systemd-journal "postfix[mode=aggressive]"
- vim /etc/fail2ban/jail.local
- fail2ban-client reload postfix
- service fail2ban restart
- fail2ban-customs
- f2b_status.sh
show my public ip
curl -4 http://ip.dynproxy.net