this post was submitted on 02 Jul 2026
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Selfhosted

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How secure is my local backup drive with sshfs? (discuss.tchncs.de)
submitted 5 days ago* (last edited 4 days ago) by 712@discuss.tchncs.de to c/selfhosted@lemmy.world
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Hello everyone.

I have been interested in starting to self-host, and I have just been able to set up the first useful thing for myself (apart from a PiHole that I have running).

Since I am very afraid of making security mistakes, I would like to get feedback from you if my setup is secure or not.

The simple use case: I want to be able to back up files from my main computer to a hard disk, without having the hard disk attached to my main computer.

The setup:

  • A Raspberry Pi 4 running Raspberry Pi OS Lite (64-bit).
  • The Raspberry Pi can only be accessed via ed25519 key.
  • I configured a firewall on the Raspberry Pi with ufw to allow only traffic from the local subnet.
  • I then use sshfs to mount the hard disk connected with the Raspberry Pi to my main computer.
  • I plan to use rsync to back up my files.

Now I need your help: how secure is this setup? Did I make any major mistake? Is there something I could do better?

I'd be happy to get some feedback... 🙂

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[–] Shimitar@downonthestreet.eu 2 points 5 days ago (2 children)

It is as secure as it can be.

Are you planning to connect to the server from internet? Are you planning to expose services to the internet?

[–] 712@discuss.tchncs.de 3 points 5 days ago (1 children)

Thank you. For now, I won't try to connect to the server from the internet. I want to learn more about VPNs before I try anything like this. I am very paranoid when it comes to security, so I don't want to risk anything... 😄

[–] irmadlad@lemmy.world 7 points 5 days ago

I am very paranoid when it comes to security, so I don’t want to risk anything… 😄

Don't relax that posture. A little paranoia can be a good thing.