Passwordless SSH login to a remote server with DSA client public key keeps asking user for password

This document (000019837) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server 12

Situation

User copies its DSA ssh public key on the remote server, but upon login the user is still asked for password.

Resolution

On SSH server open

vim /etc/ssh/sshd_config

and add

PubkeyAcceptedKeyTypes=+ssh-dss

to enable SSH server accepting DSA keys.
Restart sshd:

systemctl restart sshd.service

Cause

OpenSSH 7.0 and greater disable the ssh-dss (DSA) public key algorithm.
It is considered weak and is not recommended to use.

Disclaimer

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