On 2022-06-25 7:49 am, James Miller wrote:
I set up a small low-resource VPS a few years ago to use mainly as a
light-use xmpp server. I got Dropbear operating there so I could admin
it. Dropbear seemed a good choice since system resources were so
anemic. I recall it being quite challenging to get key-pair
authentication to finally work there, though I can't recall many
details about how I finally succeeded.
Most likely would be OpenSSH requiring sha2 for RSA signatures. If you
can use
ecdsa keys instead those should work OK.
Alternatively to keep using RSA, set
Host old-host
HostkeyAlgorithms +ssh-rsa
PubkeyAcceptedAlgorithms +ssh-rsa
in your .ssh/config for the client which will allow the older sha1 RSA
signatures.
Which OpenSSH version is it? https://www.openssh.com/releasenotes.html
has details
of what has been deprecated.
Matt
The VPS runs Ubuntu 16.04 (EMS), so the version of Dropbear there is a
bit outdated (v2017.75). Since that release was made, various changes
have happened to openssh that may, I assume, make it incompatible with
this version of Dropbear. I am using ssh when I try to connect to the
VPS, btw.
