更新日: 2022-12-04 21:23 fail2ban で不正アクセスをブロックする Postfix Nginx Ubuntu Install apt install fail2ban Postfix vi /etc/fail2ban/jail.d/postfix.conf [postfix] enabled = true mode = aggressive dovecot vi /etc/fail2ban/jail.d/dovecot.conf [dovecot] enabled=true Nginx