Deprecated sshd configurations when upgrading to ubuntu 20.04

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
ubuntu

Research direction

Start by inspecting salt/ssh/configs/sshd_config.jinja, especially the configuration corresponding to the deprecated options reported on lines 65, 66, and 80. Determine how those options should be handled for Ubuntu 20.04; done means the configuration no longer produces the reported deprecated-option messages when sshd is run.

Written by the indexing model from the issue text.

Description

While working on upgrading our salt configurations for ubuntu 20.04, I noticed these outputs in the logs from sshd:

Jul 12 12:58:40 salt-master.vagrant.psf.io sshd[1220613]: rexec line 65: Deprecated option UseLogin
Jul 12 12:58:40 salt-master.vagrant.psf.io sshd[1220613]: rexec line 66: Deprecated option UsePrivilegeSeparation
Jul 12 12:58:40 salt-master.vagrant.psf.io sshd[1220613]: rexec line 80: Deprecated option RhostsRSAAuthentication
Jul 12 12:58:40 salt-master.vagrant.psf.io sshd[1220613]: Connection from 172.17.0.1 port 60496 on 172.17.0.2 port 22 rdomain ""
Jul 12 12:58:40 salt-master.vagrant.psf.io sshd[1220613]: reprocess config line 80: Deprecated option RhostsRSAAuthentication

I'm not sure what the best approach is, opening this issue to decide how to address this in our configuration.

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