Hello list, we have sshd installed in our client chroots, so that root can have remote access to running clients. (We mainly use this for remote shutdown of clients.)
After upgrade from 12.04 LTS to 13.04, root cannot connect to running clients, although sshd is running. The reason is that clients have no ssh host keys! They are actively removed during generation of client chroots, due to the following line in /etc/ltsp/ltsp-update-image.excludes: ----------- snip ----------- etc/ssh/ssh_host_*_key ----------- snip ----------- In consequence, when trying to ssh into the client, I see the following in the client's /var/log/auth.log: ----------- snip ----------- Jul 21 16:27:46 ltsp52977 sshd[4248]: error: Could not load host key: /etc/ssh/ssh_host_rsa_key Jul 21 16:27:46 ltsp52977 sshd[4248]: error: Could not load host key: /etc/ssh/ssh_host_dsa_key Jul 21 16:27:46 ltsp52977 sshd[4248]: error: Could not load host key: /etc/ssh/ssh_host_ecdsa_key Jul 21 16:27:46 ltsp52977 sshd[4248]: fatal: No supported key exchange algorithms [preauth] ----------- snip ----------- My question: How am I supposed to ssh into a running client with its host keys removed? Is this a bug, or am I missing something stupid? Thanks for your help, regards, Rüdiger -- Dr. Rüdiger Kupper <k...@kg-fds.de> Kepler-Gymnasium Freudenstadt
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