Question
ssh refused: sshd[2444]: userauth_pubkey: key type ssh-dss not in PubkeyAcceptedKeyTypes [preauth]
- Posted on April 27, 2016
- SecurityConfiguration ManagementUbuntu 16.04
Asked by gryphonitsolutions
If you just upgraded Ubuntu 15.04/10 to Ubuntu 16.04 LTS (or otherwise upgraded OpenSSH from v6.9 to v7.0 you may be getting the ssh refusal because of changes in OpenSSH.
I was specifically getting this error in the /var/log/auth.log (via Webmin): sshd[2444]: userauth_pubkey: key type ssh-dss not in PubkeyAcceptedKeyTypes [preauth].
For this specific error, you need to add “PubkeyAcceptedKeyTypes=+ssh-dss” (without the quotations) to the bottom of your /etc/ssh/sshd_config file.
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Add a comment so I can heart it. Can’t heart “Questions”, which is what your comment shows up as. Good catch!
As explained in that StackExchange question, the security of
ssh-dssis disputed and it would be a wiser idea to generate one of the supported key types, likessh-rsaorssh-ed25519, rather than going against the software defaults.