[Bug 1834128] Re: Multiple sshd services cannot be executed

[Robie Basak]

I'm sorry, your answer doesn't help complete this bug report, so I'm
setting the status back to Incomplete.

You may find it helpful to read "How to report bugs effectively"
http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. We'd be grateful
if you would then provide a more complete description of the *problem*
that you're describing.

In particular, I expect your report to first demonstrate the *problem*,
not assume a solution. It will help if your problem statement includes
the headings "Steps to reproduce", "Expected behaviour" and "Actual
behaviour". Until you have done this I don't expect that your report
will make any progress.

Once you've done that, please change the bug status back to New. Until
you've done that, please leave the bug status as Incomplete.

** Changed in: openssh (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1834128

Title:
  Multiple sshd services cannot be executed

Status in openssh package in Ubuntu:
  Incomplete

Bug description:
  OpenSSH 7.6p1
  Ubuntu 18.04.2 (LTS) (Bionic)

  See also Ticket #1831765, #1690485, and #1832110 regarding the path of
  the privilege separation directory (aka: /run/sshd).

  The current Debian installer sets the RuntimeDirectory=sshd (i.e.
  /run/sshd) in sshd.service (i.e. /lib/systemd/system/sshd.service) and
  sshd at .service (i.e. /lib/systemd/system/sshd at .service). This is not
  the best means of implementing this service. The problem is that the
  systemd deletes the RuntimeDirectory resource as soon as the service
  is stopped. When this happens, other sshd services will fault since
  the privileged separation directory is no longer there. We need to
  modify the configuration as follows:

  1) Create /usr/lib/tmpfiles.d/sshd.conf that defines the /run/sshd directory with root:root as the owner and the protection of 0755.
  2) Change the assignment of the RuntimeDirectory in sshd.service to something other than sshd (i.e. /run/sshd).
  3) Change the assignment of the RuntimeDirectory in sshd at .service to something other than sshd (i.e. /run/sshd).

  Both OpenSSH and Ubuntu have declined to provision a means of
  adjusting the Privilege Separation directory. Since both teams do not
  want to address this, we need to have a means of implementing multiple
  instance sshd invocation using  systemd and avoiding using the
  RuntimeDirectory assignment of /run/sshd.

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