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How to Remove Banned IP from Fail2ban on CentOS 6 / CentOS 7
Fail2ban is an intrusion prevention software framework that able to protect your server from brute-force attacks. Fail2ban written in the Python programming language and is widely used by most of the VPS servers. Fail2ban will scan log files and IP blacklists that shows signs of malicious, too many password failures, web server exploitation, WordPress plugin attacks and other vulnerabilities. If you already installed and used fail2ban to protect your web server, you may be wondering how to find the IP banned or blocked by Fail2ban, or you may want to remove banned ip from fail2ban jail on CentOS 6, CentOS 7, RHEL 6, RHEL 7 and Oracle Linux 6/7.
How to List of Banned IP address
To see all the blocked ip addresses, run the following command :
# 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
How to Remove Banned IP from Fail2ban jail
# iptables -D f2b-NoAuthFailures -s banned_ip -j REJECT
I hope this article gives you some ideas and quick guide on remove banned IP from Fail2ban jail on on CentOS 6, CentOS 7, RHEL 6, RHEL 7 and Oracle Linux 6/7.
via: http://www.ehowstuff.com/how-to-remove-banned-ip-from-fail2ban-on-centos/