I came to say pretty much this. It's high time for somebody to write a guide to linux networking. The closest thing to a comprehensive guide is the Linux Adva

I came to say pretty much this. It's high time for somebody to write a guide to linux networking. The closest thing to a comprehensive guide is the Linux Advanced Routing & Traffic Control HOWTO (https://lartc.org https://lartc.org) but the last update (as far as I can tell from the website) is from 2012.