yum install fail2ban /etc/fail2ban/jail.conf добавляем строки: [postfix-ban] enabled = true filter = postfix action = iptables-multiport[name=PFIX, port=»smtp,smtps», protocol=tcp] logpath = /var/log/maillog maxretry = 3 bantime = 7200 [dovecot-ban] enabled = true filter = dovecot action = iptables-multiport[name=DCOT, port=»pop3,pop3s,imap,imaps», protocol=tcp] logpath = /var/log/maillog findtime = 300 maxretry = 10 bantime = 1800 [sasl-ban] enabled = true […]