iptables-remove

#!/bin/bash

# Easy-IPtables
################
#
# This script is part of Easy-Iptables Suite
# It allows you to add or delete certain rules on iptables input chain
#
# Version: 0.1
# Author: Pol Jane      pol@zyrcle.com
#
# Usage: iptables-add <rule_num>
#
# iptables-remove -n <num> -c <chain> 
#

# Here our default values :)
CHAIN=INPUT
IPT_BIN="/sbin/iptables"
rule_number=
source=0.0.0.0
destination=

function usage() {
	echo -e "[ iptables-remove usage: iptables-remove -n <num> -c <chain> ]"
        echo -e "\t\t-n <num>		Specify a rule number"
        echo -e "\t\t-c <chain> 	Define chain where to add the rule"
	echo -e "\t\t-h | --help 	Show this help"

}

if [[ ( $# -lt 1 ) || ( $# -eq "0" ) ]]; then 
	usage
fi
function check_if_ipt() {
	if [[ ( ! -f $IPT_BIN ) || ( ! -x $IPT_BIN ) ]]; then 
		echo "ERROR: iptables Not Found"
		exit 4
	fi
}
check_if_ipt
# A string with command options
options=$@


# An array with all the arguments
arguments=($options)

# Loop index
index=0

for argument in $options
  do
    # Incrementing index
    index=`expr $index + 1`

    # The conditions
    case $argument in
      -n)       
                rule_number=${arguments[index]}
        ;;
      -c) 
                CHAIN=${arguments[index]}
        ;;
      -h|--help) 
                port=${arguments[index]}
        ;;
    esac
  done

if [ -z $port ]; then
        iptables -D $CHAIN $rule_number 
else
        iptables -D $CHAIN $rule_number 
fi


exit;