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установка fail2ban

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 = ...
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