Cria um redirecionamento de porta para o Azk.

foward-to-azk.sh

#!/bin/bash
INPUT_PORT=8000

# Usage info
show_help() {
cat << EOF
Uso: ${0##*/} [-arl]
Redirecionamento da porta $INPUT_PORT para um Serviço Azk.

    -h          display this help and exit
    -a          Add rule for Azk
    -r          Remove fule for Azk
    -l          List rules NAT that foward to Azk

EOF
}

OPTIND=1 # Reset is necessary if getopts was used previously in the script.  It is a good idea to make this local in a function.
while getopts "harl" opt; do
    case "$opt" in
        h)
            show_help
            exit 0
            ;;
        a)
            INTERNAL_IP=`/sbin/ifconfig wlan0|grep inet|head -1|sed 's/\:/ /'|awk '{print $3}'`
            AZK_IP=172.17.42.1

            echo "Qual a porta alvo do Azk?"
            read AZK_PORTA_ALVO
            sudo iptables -t nat -A PREROUTING -p tcp -d $INTERNAL_IP --dport $INPUT_PORT -j DNAT --to $AZK_IP:$AZK_PORTA_ALVO
            echo "Azk Escutando na porta $INPUT_PORT"
            exit 1
            ;;
        r)
            echo "Selecione o numer da regra a excluir:"
            sudo iptables -L -t nat --line-numbers | grep "to:172.17.42.1:"
            echo "--------------------------------------------------------"
            echo "Digite o número da regra a excluir:"
            read IPTABLES_LINE_NUMBER
            sudo iptables -t nat -D PREROUTING $IPTABLES_LINE_NUMBER
            echo "Regra removida com sucesso!"
            exit 1
            ;;
        l)
            echo "Lista de regras que apontam pro Azk:"
            sudo iptables -L -t nat --line-numbers | grep "to:172.17.42.1:"
            exit 1
            ;;
        '?')
            show_help >&2
            exit 1
            ;;
    esac
done

shift "$((OPTIND-1))" # Shift off the options and optional --.

show_help