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What are the most paranoid network/OS security measures you've implemented in your homelab? (lemmy.world)

submitted 9 months ago by [email protected] to c/[email protected]

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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!).

Thanks!

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[–] [email protected] 7 points 9 months ago (6 children)

Notifications on system file access

Notifications on root login/sudo

Declarative OS, tmpfs root, disabled sudo

Bastion server, but right now I don't have a proper router to do it at home

Yubikey, or a separate phone on Graphene OS for otp, keys, etc

Authelia + fascist fail2ban (or some CSF)

Most of these are pretty normal, but usually you don't do them all at once 😄 also, I don't really like hiding my services from the open internet, authelia is fine tuned to let people only access what they are supposed to. And regular users of my server usually don't notice that I even have it

[–] [email protected] 0 points 9 months ago (1 children)

Declarative OS, tmpfs root, disabled sudo

How do you change anything about the OS/do updates? iirc nixos requires elevated privileges for that?

[–] [email protected] 1 points 9 months ago* (last edited 9 months ago)

There are many ways to do many things in nixos

For updates you can do automatic updates

Also, there are many deployment tools, like deploy-rs, morph, colmena, bento. They all have different approaches. Some you use ssh to deploy a remote system. Some just fetch the configuration and autodeploy it.

There are many ways how you can play with this. So you can disable sudo, and deploy with ssh only from some or a specified ip. Or you can keep ssh for root disabled and just deploy home-manager. It's really a lot, you imagination is the only limit

P.s. or you can just generate an image from a trusted machine, and flash it onto the device you want, unlimited number of ways

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