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  To remove those IP is prohibited Fail2ban on CentOS 6/7
     
  Add Date : 2017-01-08      
         
       
         
  Fail2ban is a tool for protecting your server from intrusion protection software violent attacks. fail2ban written in python, and is widely used on many servers. fail2ban scans log files and IP blacklists to display malicious software, too many failed password attempts, web server utilization, wordpress plugin attacks and other vulnerabilities. If you have installed and use fail2ban to protect your web server, you might want to know how CentOS 6, CentOS 7, RHEL 6, RHEL 7 and Oracle Linux 6/7 found by fail2ban blocked IP, or if you want to ip will be removed from fail2ban prison.

How to list banned IP

To view all blocked ip address, 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 do you remove the IP from Fail2ban

# Iptables -D f2b-NoAuthFailures-s banned_ip -j REJECT
I hope this tutorial can give you CentOS 6, CentOS 7, RHEL 6, RHEL 7 and Oracle Linux 6/7 to remove banned ip some guidance.
     
         
       
         
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