Why Key Authorization is not working?
Why Is Key Authorization Not Working?
In case, after configuring the server and adding the global key to /root/.ssh/authorized_keys, why is it still asking for a password when attempting to log in?
Go through the following Troubleshooting steps:
- Check whether the PubKeyAuthentication is enabled on the sshd conf of the remote server.
[email protected]:~# sshd -T | grep -i ’PermitRootLogin\|PubkeyAuthentication’
- Confirm that the remote server is added with the remote username "root".
- Reset the fingerprint of the remote Server.
After resetting try to reset sshd and try to re-login to ezsh.
[email protected]:~# systemctl restart sshd
- Check the latest SSH logs for any errors.
If the remote server is Ubuntu --> [email protected]:~# tail -f /var/log/auth.log
If the remote server is CentOS --> [email protected]:~# tail -f /var/log/secure
- Run the following command to see which key types are enabled on the server.
[email protected]:~# sshd -T|grep -i key
pubkeyacceptedalgorithms [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],rsa-sha2-512,rsa-sha2-256
Add ssh-rsa to sshd conf in the remote server.
In Ubuntu 22, ssh-rsa is disabled by default, so you need to enter it manually..
[email protected]:~# echo "PubkeyAcceptedKeyTypes ssh-rsa" >> /etc/ssh/sshd_config
Re-run the below command and confirm that ssh-rsa has been enabled.
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