do nat stuff quickly

shotgun-nat.sh

#!/bin/bash

echo -ne "\n\n\n Your interfaces: \n\n"

ip link sh

echo -ne "\n---------------------\n\n"
echo -ne "\n Enter interface name:\n"

read -r -p "Internet Interface: " INET
read -r -p "Private Interface: " PNET

echo " /sbin/iptables -t nat -A POSTROUTING -o $INET -j MASQUERADE"
echo " /sbin/iptables -A FORWARD -i $INET -o $PNET -m state --state RELATED,ESTABLISHED -j ACCEPT"
echo " /sbin/iptables -A FORWARD -i $PNET -o $INET -j ACCEPT"

echo 1 > /proc/sys/net/ipv4/ip_forward