cross-posted from: https://infosec.pub/post/10908807
TLDR:
If I use SSH as a Tor hidden service and do not share the public hostname of that service, do I need any more hardening?
Full Post:
I am planning to setup a clearnet service on a server where my normal “in bound” management will be over SSH tunneled through Wireguard. I also want “out of bound” management in case the incoming ports I am using get blocked and I cannot access my Wireguard tunnel. This is selfhosted on a home network.
I was thinking that I could have an SSH bastion host as a virtual machine, which will expose SSH as a a hidden service. I would SSH into this VM over Tor and then proxy SSH into the host OS from there. As I would only be using this rarely as a backup connection, I do not care about speed or convenience of connecting to it, only that it is always available and secure. Also, I would treat the public hostname like any other secret, as only I need access to it.
Other than setting up secure configs for SSH and Tor themselves, is it worth doing other hardening like running Wireguard over Tor? I know that extra layers of security can’t hurt, but I want this backup connection to be as reliable as possible so I want to avoid unneeded complexity.
If you don’t have any good reason not to, always set your SSH server to only authenticate with keys.
Anything else is irrelevant.
This is the internet. If you poke the bear, somebody will come-up with a completely reasonable use case of password authentication that happened once somewhere on the world.
Playing with a Raspberry Pi inside my own home network with nothing important going on and I turned the Pi off when I’m done. Like why worry about it at that point?
Easy. I have servers that are only available on my local network and lots of different devices that I MIGHT want to use to access those servers. I haven’t bothered to make sure my key is on EVERY SINGLE DEVICE and some of them, I might not actually even WANT my key on as they’re not terribly well secured and they might leave my house (my Windows gaming laptop I haven’t used in six months comes to mind).
But for cloud accessible servers… yeah.
30 character
You’ve gotta pump those numbers, those are rookie numbers. (I have a vps that has several times that figure)
