[SOLVED] moving sshkey to newly installed OS

oliveoyl · 03-14-2017, 12:06 PM

I backed up my .ssh directory and then did a fresh OS install. After moving the keys to .ssh I'm not able to connect via keys. Is there anything else that needs to be done when moving keys?

Turbocapitalist · 03-14-2017, 12:45 PM

It would help with the exact error message and the line you are using to connect.

But minus those, one guess is that the permissions for the directory and the private keys may be off. The directory should be u=rwx,g=,o= aka 700 and private keys u=rw,g=,u= aka 600. The other files can have the same permissions as the private keys and it won't hurt.

273 · 03-14-2017, 12:49 PM

As above post really but:
Public or private keys? Same distro or different?

oliveoyl · 03-14-2017, 12:58 PM

Perms are correct. I'm on ssh 7.3 and it looks like it does not like my dsa key.

debug1: Skipping ssh-dss key id_dsa - not in PubkeyAcceptedKeyTypes

Turbocapitalist · 03-14-2017, 01:06 PM

Ok. The legacy cryptography is the problem.

Quote:

* Support for ssh-dss, ssh-dss-cert-* host and user keys is disabled
by default at run-time.
https://www.openssh.com/txt/release-7.0

The solution is to generate new keys that use RSA or Ed25519.