fail2ban 使用

============= fail2ban install =============

yum update && yum install epel-release

yum -y install fail2ban

============= fail2ban config =============
cp /etc/fail2ban/jail.conf jail.local

// 修改默认配置
[DEFAULT]
# "bantime" is the number of seconds that a host is banned.
bantime = 259200

# A host is banned if it has generated "maxretry" during the last "findtime"
# seconds.
findtime = 120

# "maxretry" is the number of failures before a host get banned.
maxretry = 3

// 防护指定应用
[sshd]
enabled = true

============= fail2ban status =============

fail2ban-client -i

status

status sshd

fail2ban-client set sshd unbanip IPADDRESS