#!/bin/bash

wget -O /tmp/cloud.json https://www.gstatic.com/ipranges/cloud.json

grep "ipv4Prefix" /tmp/cloud.json | sort -V | \
    cut -f 2 -d ":" | cut -f 2 -d '"' > /tmp/cloud-ipv4.txt

for i in `cat /tmp/cloud-ipv4.txt `
    do echo "-A INPUT -p tcp -s $i -j DROP"
done > /tmp/google-cloud-ipv4-DROP.txt

cat /tmp/google-cloud-ipv4-DROP.txt