Code for blog post https://fishi.devtail.io/weblog/2019/03/30/measuring-traffic-with-iptables/

measureTraffic.sh

#! /bin/bash

usage() {
        echo "measureTraffic.sh <targetIP>"
}

if [ -z "$1" ]; then
        usage
        exit 1
fi

iptables -N TARGET
iptables -A TARGET -d $1
iptables -A TARGET -s $1
iptables -A INPUT -j TARGET
iptables -A OUTPUT -j TARGET
iptables -Z TARGET