I'm at a bit of a loss on this one so I thought I'd see if anyone has any other suggestions.
My home network is all Ubiquity UniFi gear. I have a USG-3P router, a few switches and one AP. There is a UniFi controller app that centrally handles the configuration of the devices, including managing SSH access. You enter a public key in the controller software and it distributes it to all the devices automatically. I rarely actually SSH into any of the devices so I don't know when this stopped working but at some point it did work. I have the public keys for my desktop and laptop, both running Fedora 33, in the controller but when I attempt to SSH I am prompted for the UniFi admin password rather than my private key password. I don't get any sort of cipher mismatch or any other error, it just prompts for the account password.
Things I've tried: * Verified permissions on ~/.ssh * I can still SSH into many other hosts and they all accept my RSA key just fine * I removed and re-added the keys in the USG controller * The fingerprint of the keys, as displaying in the controller software, matches the fingerprint in seahorse (Passwords and Keys) * Verified public key auth works to the UniFi gear from several other devices I have, including a Macbook, iPhone, Raspberry Pi, and an Ubuntu VM * I built a fresh Fedora 33 virtual machine, added its public key, and it has the same issue * I verified the keys are actually being copied to the authorized_keys on several different UniFi boxes * Comparing keys to my MacBook, both are RSA and have a length of 3072
Essentially any Fedora box I've tried won't do public key auth to any of the UniFi gear but they all authenticate fine everywhere else, and every non-Fedora device I've tried can authenticate to the UniFi stuff. The UniFi gear doesn't even all run the same OS, the USG runs EdgeOS and has the keys in .ssh/authorized_keys but the switches have a busybox shell and use dropbear for ssh with the keys at /etc/dropbear/authorized_keys
I can just use the password for SSH, it's very rare that I actually have any reason to do it at all, it's just the puzzle that is driving me crazy.