[Bug 2059872] Re: Unable to listen on port 22 if multiple Port= present in sshd configuration

[Nick Rosbrook]

** Changed in: openssh (Ubuntu)
       Status: Triaged => In Progress

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Title:
  Unable to listen on port 22 if multiple Port= present in sshd
  configuration

Status in openssh package in Ubuntu:
  In Progress

Bug description:
  Recently introduced sshd-socket-generator for socket activation in
  openssh 1:9.6p1-3ubuntu3 has a bug when dealing with multiple Port or
  ListenAddress entries in the sshd configuration.

  If you have multiple Port or ListenAddress and one of them is for port
  22, it just skips it.

  To show it clearly, here is an example:
  Port 22
  Port 1024

  It generates:
  ListenStream=
  ListenStream=1024

  Now nothing is listening to port 22, hence breaking existing
  configurations.

  This was tested on 1:9.6p1-3ubuntu11.

  The intention seems to be to not generate the drop-in if only port 22
  is in use, but it does not account for the case of multiple Port or
  ListenAddress where one of them is for port 22.

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