get_google_cloud_ips.sh

#!/bin/bash

# https://cloud.google.com/compute/docs/faq#ipranges

#nslookup -q=TXT _cloud-netblocks.googleusercontent.com  8.8.8.8

for LINE in `dig txt _cloud-netblocks.googleusercontent.com +short | tr " " "\n" | grep include | cut -f 2 -d :`
do
	dig txt $LINE +short
done | tr " " "\n" | grep ip4  | cut -f 2 -d : | sort -n | tr '\n' ',' | sed 's/,$//g'


# adapted from https://gist.github.com/n0531m/f3714f6ad6ef738a3b0a