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安装和配置 fail2ban工具通过分析日志来自动 ban 入侵者的IP,下载地址在: 复制代码 代码如下:vi /etc/fail2ban.conf #以 daemon 方式启动 fail2ban background = true #允许尝试次数 maxfailures = 3 #触发 maxfailures 之後的封锁时间(秒); 设为 -1 表示永远封锁 bantime = 3600 #以 findtime (秒) 时间内的错误记录作为 maxfailures 的计数基准 findtime = 600 #排除 IP 范围, 以空白隔开 ignoreip = 127.0.0.1 192.168.0.0/24 #不启用 mail 通知 [MAIL] enabled = false #修改自 VSFTPD, 未提及的部份保持原设定 [PROFTPD] enabled = true logfile = /var/log/proftpd/proftpd.log failregex = no such user|Incorrect password #未提及的部份保持原设定 [SSH] enabled = true logfile = /var/log/secure service fail2ban start 这个服务启动以后,每天都能在 /var/log/fail2ban.log 中看到有攻击的肉鸡被 ban 了。 复制代码 代码如下:2015-08-01 09:13:33,532 WARNING: SSH: Ban (3600 s) 205.189.197.66 2015-08-01 12:24:41,943 WARNING: SSH: Ban (3600 s) 121.52.209.5 移除被 Fail2ban 禁止的 IP 复制代码 代码如下:# iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination f2b-AccessForbidden tcp -- anywhere anywhere tcp dpt:http f2b-WPLogin tcp -- anywhere anywhere tcp dpt:http f2b-ConnLimit tcp -- anywhere anywhere tcp dpt:http f2b-ReqLimit tcp -- anywhere anywhere tcp dpt:http f2b-NoAuthFailures tcp -- anywhere anywhere tcp dpt:http f2b-SSH tcp -- anywhere anywhere tcp dpt:ssh f2b-php-url-open tcp -- anywhere anywhere tcp dpt:http f2b-nginx-http-auth tcp -- anywhere anywhere multiport dports http,https ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT icmp -- anywhere anywhere ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere anywhere tcp dpt:EtherNet/IP-1 ACCEPT tcp -- anywhere anywhere tcp dpt:http REJECT all -- anywhere anywhere reject-with icmp-host-prohibited Chain FORWARD (policy ACCEPT) target prot opt source destination REJECT all -- anywhere anywhere reject-with icmp-host-prohibited Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain f2b-NoAuthFailures (1 references) target prot opt source destination REJECT all -- 64.68.50.128 anywhere reject-with icmp-port-unreachable REJECT all -- 104.194.26.205 anywhere reject-with icmp-port-unreachable RETURN all -- anywhere anywhere 从 Fail2ban 中移除 IP 复制代码 代码如下:# iptables -D f2b-NoAuthFailures -s banned_ip -j REJECT |
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