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CentOS7安裝fail2ban+Firewalld防止爆破與CC攻擊
要在CentOS 7上安裝fail2ban和Firewalld以防止暴力破解和CC攻擊，首先需要安裝EPEL倉庫，然后使用yum命令安裝fail2ban和firewalld。安裝完成后，啟動并設(shè)置開機自啟動這兩個服務(wù)。根據(jù)需要配置fail2ban和firewalld的規(guī)則。
CentOS 7安裝fail2ban + Firewalld防止爆破與CC攻擊
1. 安裝fail2ban
步驟1：更新系統(tǒng)
sudo yum update y
步驟2：安裝fail2ban
sudo yum install fail2ban y
步驟3：啟動并設(shè)置開機自啟動
sudo systemctl start fail2ban sudo systemctl enable fail2ban
2. 配置Firewalld
步驟1：安裝Firewalld
sudo yum install firewalld y
步驟2：啟動并設(shè)置開機自啟動
sudo systemctl start firewalld sudo systemctl enable firewalld
步驟3：添加端口規(guī)則（以SSH為例）
sudo firewallcmd permanent addport=22/tcp sudo firewallcmd reload
3. 配置fail2ban
步驟1：編輯jail.local文件
sudo vi /etc/fail2ban/jail.local
在文件中添加以下內(nèi)容：
[ssh] enabled = true port = 22 filter = sshd logpath = /var/log/secure maxretry = 3 action = firewallcmdipset
步驟2：創(chuàng)建firewallcmdipset動作文件
sudo vi /etc/fail2ban/action.d/firewallcmdipset.conf
在文件中添加以下內(nèi)容：
Fail2Ban configuration file # Author: YourName # [INCLUDES] [Definition] Options used by action, common for all jails actionstart =a s actionstop = a s X actioncheck = a s Default banning range (e.g. IPv4, IPv6, ...) default = 0.0.0.0/0 The following options can be used with IPv4 only bantime = 3600 # Default ban time in seconds for IPv4 maxretry = 3 # Default max number of retries before ban in IPv4 mode ignoreip = 127.0.0.1/8 # Local host subnets banip = 0.0.0.0/0 # All the IP addresses to ban findtime = 600 # Default time in seconds between checks if an IP is still banned The following options can be used with IPv6 only bantime6 = 3600 # Default ban time in seconds for IPv6 maxretry6 = 3 # Default max number of retries before ban in IPv6 mode ignoreip6 = fe80::/10 # Local host subnets banip6 = ::/0 # All the IP addresses to ban findtime6 = 600 # Default time in seconds between checks if an IP is still banned
步驟3：重啟fail2ban服務(wù)
sudo systemctl restart fail2ban
至此，CentOS 7已經(jīng)成功安裝fail2ban和Firewalld，可以有效防止爆破和CC攻擊。
相關(guān)問題與解答
Q1：如何查看被禁止的IP地址？
A1：可以使用以下命令查看被禁止的IP地址：
sudo fail2banclient status ssh
Q2：如何解除某個IP地址的封禁？
A2：可以使用以下命令解除某個IP地址的封禁（將
sudo firewallcmd permanent zone=public removesource=/32 sudo firewallcmd reload
新聞標題：CentOS7安裝fail2ban+Firewalld防止爆破與CC攻擊
轉(zhuǎn)載來于：http://fisionsoft.com.cn/article/dhdcogo.html
