#!/bin/sh
PROG="${0##*/}"

if [ $# = 0 ]; then
    echo "Usage: $PROG <ipaddr>"
    exit 1
fi

USER_IP=$3

NUM_RULES=`iptables -L FORWARD -v -n |grep $USER_IP|grep REJECT|wc -l`

if [ $NUM_RULES = 0 ]; then
    iptables -A FORWARD -s $USER_IP -j REJECT
fi
