100TB HDDs by 2030.

Muhahah! Alas! I’ll probably won’t last long enough to enjoy them.

hmmmm. Wouldn’t you have to remove the Debian kernal and use the Proxmox kernal? Sorry, not trying to be obtuse, I just have never installed Proxmox ‘on top’ of Debian. I always opted for the clean install.

OP, I’m running Proxmox on and old Dell T320 /32gb RAM. I am not having any real issues doing so. I run Docker and a handful of Docker containers. I’m really not into the arr stack, but I wouldn’t think you’d have much issue.

I do always suggest installing Debian first, and then installing Proxmox on top.

Correct me if I’m wrong, but isn’t Proxmox it’s own OS unto itself? What would be the advantage of installing Proxmox ‘on top of’ Debian when it’s Debian already as you pointed out?

IMHO, security measures are necessary. I have a tendency to go a bit heavy on security because I really hate having to mop up after a breach. So the more layers I have, the better I feel. Most of the breaches I’ve experienced were not some dude in a smokey, dimly lit room, wearing a hoody, and clacking away at a keyboard, while confidently announcing ‘I’m In!’ or ‘Enhance!’. Most are bots by the thousands. The bots are pretty sophisticated now days. They can scan vulnerabilities, attack surfaces, et al. They have an affinity for xmrig too, tho those are easy to spot when your server pegs all resources.

So, for the couple days investment of implementing a good, layered security defense, and then the time it takes to monitor such defenses, is worth it to me, and lets me sleep better. To each their own. Not only are breaches a pain in the ass, they have serious ramifications and can have legal consequences such as in a case where your server became a hapless zombie and was orchestrated to attack other servers. So, even on the selfhosted side of things, security measures are required, I would think.

It takes about 5 minutes to set up UFW which would be the absolute minimum, I would think.