#!/bin/bash
blockediplist='/tmp/block.list'

tail -f "$blockediplist" | while read LINE; do
        IP=$(echo "${LINE}" | grep '\.' | awk '{print $1}')
        LC=$(iptables -L -n | grep "${IP}" | wc -l)
                if [ "$LC" -eq 0 ]; then
                        echo "$(date) firewalling $IP"
                        iptables -A INPUT -s $1 "${IP}" -j DROP
                else
                        echo "Not banning ${IP} due to already being banned."
                fi
done