0
votes
1answer
44 views

Does ssh-keyscan tell you if a server supports RSA or DSA keys?

A question came up on the Unix & Linux SE site: Checking if passwordless ssh authorization is possible without permission for sshd_config?. I immediately thought you could possibly infer this ...
1
vote
4answers
304 views

SSH: reusing public keys and known-man-in-the-middle

Usually, people recommend to use a single private-public key pair everywhere (if we're not talking about a possibility of compromising the private key): Best Practice: “One per-user ssh key” or ...
11
votes
2answers
2k views

SSH key-type, rsa, dsa, ecdsa, are there easy answers for which to choose when?

As someone who knows little about cryptography, I wonder about the choice I make when creating ssh-keys. ssh-keygen -t type, where type is either of dsa,rsa and ecdsa. Googling can give some ...
1
vote
2answers
712 views

Creating user specific authentication methods in SSH

I have configured sshd on an Ubuntu server to use key authentication and it is working fine. I had to disable password authentication for key authentication to work. Server is always accessed via ...
2
votes
1answer
430 views

Security issues related to public keys and SSH

Do I have to mind something specific when using public keys and SSH? Well of course, I have to keep my private key secret (and therefore I should choose a strong pass phrase). But is there something ...