[Bug 2069041] Re: Changing Port in sshd_config and restarting ssh.service without effect

[Pedro Macedo]

I modified the /etc/sshd/sshd_config file, ran the commands:
systemctl daemon-reload
systemctl restart ssh.socket
And the port was not changed.

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Title:
  Changing Port in sshd_config and restarting ssh.service without effect

Status in openssh package in Ubuntu:
  Triaged
Status in openssh source package in Noble:
  Triaged

Bug description:
  Changing the Port directive in sshd_config and restarting ssh.service
  is without effect, sshd keeps listening to port 22.

  Also mentioned in https://discourse.ubuntu.com/t/sshd-now-uses-socket-
  based-activation-ubuntu-22-10-and-later/30189/32

  Steps to reproduce:
  1. Install Ubuntu 24.04 LTS
  2. Change Port directive in /etc/ssh/sshd_config to Port 2233
  3. Restart ssh.service
  4. Observe sshd still listening to port 22

  Expected behaviour: sshd changes port to 2233

  Actual behaviour: sshd keeps listening to port 22

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