We have a winner: setting usePAM to no generates the issue: /etc/ssh/sshd_config ------------------------------- ... usePAM no
ChallengeResponseAuthentication no PasswordAuthentication no PermitEmptyPasswords no ... ssh -v root@localhost --------------------------------- ... debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /root/.ssh/id_rsa debug1: Authentications that can continue: publickey debug1: Trying private key: /root/.ssh/id_dsa debug1: Trying private key: /root/.ssh/id_ecdsa debug1: Offering ED25519 public key: /root/.ssh/id_ed25519 debug1: Authentications that can continue: publickey debug1: No more authentication methods to try. Permission denied (publickey). However, setting usePAM to yes makes the session work: /etc/ssh/sshd_config ------------------------------- ... use PAM yes ChallengeResponseAuthentication no PasswordAuthentication no PermitEmptyPasswords no ... ssh -v root@localhost -------------------------------- ... debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /root/.ssh/id_rsa debug1: Server accepts key: pkalg ssh-rsa blen 279 Enter passphrase for key '/root/.ssh/id_rsa': debug1: Authentication succeeded (publickey). Authenticated to localhost ([::1]:xxx). debug1: channel 0: new [client-session] debug1: Requesting no-more-sessi...@openssh.com debug1: Entering interactive session. debug1: client_input_global_request: rtype hostkeys...@openssh.com want_reply 0 debug1: Sending environment. debug1: Sending env LANG = en_US.UTF-8 Welcome to Ubuntu 15.10 (GNU/Linux 4.2.0-19-generic x86_64) ... ** Information type changed from Private Security to Public Security ** Summary changed: - Permission denied (publickey) whereas the public key has been inserted into ~/.ssh/authorized_keys + Permission denied (publickey) whereas the public key has been inserted into ~/.ssh/authorized_keys: usePAM no issue ** Summary changed: - Permission denied (publickey) whereas the public key has been inserted into ~/.ssh/authorized_keys: usePAM no issue + Permission denied (publickey) whereas the public key has been inserted into ~/.ssh/authorized_keys: "usePAM no" issue -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/1522190 Title: Permission denied (publickey) whereas the public key has been inserted into ~/.ssh/authorized_keys: "usePAM no" issue To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1522190/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
