unbanIP.sh

#!/bin/bash

# Script to unblock any IPs that denyhosts and fail2ban blocks.
# Slighty amended version of: https://gist.github.com/jayjanssen/1043053#file-denyhosts-remove-ip-sh-L1
# Script will remove the IP from all of the files inside of /var/lib/denyhosts except for allowed-hosts (the whitelist)
# Then loop through and unblock the IP from IPTABLES
# It will also unban any IPs in the fail2ban sshd jail

if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 
   exit 1
fi

if [ -z $1 ]; then
    echo "Example usage: ./unbanIP.sh 192.168.1.2" 
    exit 1
fi

#denyhosts
cd /var/lib/denyhosts
for i in `ls | grep -v allowed`; do mv $i $i.old; grep -v $1 $i.old >> $i; done
cp /etc/hosts.deny /tmp/hosts.deny
grep -v $1 /tmp/hosts.deny > /etc/hosts.deny
rm /var/lib/denyhosts/*.old

#fail2ban
fail2ban-client set sshd unbanip $1

#iptables
IPCOUNT=$(iptables -L | grep $1 | wc -l)
for n in `seq 1 $IPCOUNT`; do iptables -D INPUT -s $1 -j DROP; done