What are the most paranoid network/OS security measures you've implemented in your homelab?
As the title says, I want to know the most paranoid security measures you've implemented in your homelab. I can think of SDN solutions with firewalls covering every interface, ACLs, locked-down/hardened OSes etc but not much beyond that. I'm wondering how deep this paranoia can go (and maybe even go down my own route too!).
Losing stuff costs a lot more, depending on what it is. Also the stress and health risks accompanied are too much for me.
You can get backups as low as 3$/tb afaik. But I only backup stuff that actually means something to me. Photos and videos, documents and code. No movies which take up a lot of space if you copy them with all the subtitles and languages.