fail2ban 是一款用于保护你的服务器免于暴力攻击的入侵保护软件。fail2ban 用 python 写成，并广泛用于很多服务器上。fail2ban 会扫描日志文件和 IP 黑名单来显示恶意软件、过多的密码失败尝试、web 服务器利用、wordpress 插件攻击和其他漏洞。如果你已经安装并使用了 fail2ban 来保护你的 web 服务器，你也许会想知道如何在 CentOS 6、CentOS 7、RHEL 6、RHEL 7 和 Oracle Linux 6/7 中找到被 fail2ban 阻止的 IP，或者你想将 ip 从 fail2ban 监狱中移除。
如何列出被禁止的 IP
要查看所有被禁止的 ip 地址，运行下面的命令：
- # 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
如何从 Fail2ban 中移除 IP
- # iptables -D f2b-NoAuthFailures -s banned_ip -j REJECT
我希望这篇教程可以给你在 CentOS 6、CentOS 7、RHEL 6、RHEL 7 和 Oracle Linux 6/7 中移除被禁止的 ip 一些指导。
