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Message #00086
[Bug 2069041] Re: Changing Port in sshd_config requires calling systemctl daemon-reload
Verification for part 2 of the test plan:
root@n:~# apt policy openssh-server
openssh-server:
Installed: 1:9.6p1-3ubuntu13.12
Candidate: 1:9.6p1-3ubuntu13.12
Version table:
*** 1:9.6p1-3ubuntu13.12 100
100 /var/lib/dpkg/status
1:9.6p1-3ubuntu13.11 500
500 http://archive.ubuntu.com/ubuntu noble-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu noble-security/main amd64 Packages
1:9.6p1-3ubuntu13 500
500 http://archive.ubuntu.com/ubuntu noble/main amd64 Packages
root@n:~# sed -i 's/Prompt=lts/Prompt=normal/g' /etc/update-manager/release-upgrades
root@n:~# do-release-upgrade
Checking for a new Ubuntu release
= Welcome to Ubuntu 24.10 'Oracular Oriole' =
The Ubuntu team is proud to announce Ubuntu 24.10 'Oracular Oriole'.
To see what's new in this release, visit:
https://wiki.ubuntu.com/OracularOriole/ReleaseNotes
Ubuntu is a Linux distribution for your desktop or server, with a fast
and easy install, regular releases, a tight selection of excellent
applications installed by default, and almost any other software you
can imagine available through the network.
We hope you enjoy Ubuntu.
== Feedback and Helping ==
If you would like to help shape Ubuntu, take a look at the list of
ways you can participate at
http://www.ubuntu.com/community/participate/
Your comments, bug reports, patches and suggestions will help ensure
that our next release is the best release of Ubuntu ever. If you feel
that you have found a bug please read:
http://help.ubuntu.com/community/ReportingBugs
Then report bugs using apport in Ubuntu. For example:
ubuntu-bug linux
will open a bug report in Launchpad regarding the linux package.
If you have a question, or if you think you may have found a bug but
aren't sure, first try asking on the #ubuntu or #ubuntu-bugs IRC
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Continue [yN] y
Get:1 Upgrade tool signature [833 B]
Get:2 Upgrade tool [1049 kB]
Fetched 1050 kB in 0s (0 B/s)
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py:237: Warning: W:Download is performed unsandboxed as root as file 'oracular.tar.gz.gpg' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
result = fetcher.run()
authenticate 'oracular.tar.gz' against 'oracular.tar.gz.gpg'
extracting 'oracular.tar.gz'
[screen is terminating]
root@n:~# cat /etc/os-release
PRETTY_NAME="Ubuntu 24.10"
NAME="Ubuntu"
VERSION_ID="24.10"
VERSION="24.10 (Oracular Oriole)"
VERSION_CODENAME=oracular
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=oracular
LOGO=ubuntu-logo
root@n:~# apt policy openssh-server
openssh-server:
Installed: 1:9.7p1-7ubuntu4.3
Candidate: 1:9.7p1-7ubuntu4.3
Version table:
*** 1:9.7p1-7ubuntu4.3 500
500 http://archive.ubuntu.com/ubuntu oracular-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu oracular-security/main amd64 Packages
100 /var/lib/dpkg/status
1:9.7p1-7ubuntu4 500
500 http://archive.ubuntu.com/ubuntu oracular/main amd64 Packages
There were no debconf prompts or other issues relating to the upgrade of
openssh-server.
** Tags removed: verification-needed verification-needed-noble
** Tags added: verification-done verification-done-noble
--
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to openssh in Ubuntu.
https://bugs.launchpad.net/bugs/2069041
Title:
Changing Port in sshd_config requires calling systemctl daemon-reload
Status in openssh package in Ubuntu:
Fix Released
Status in openssh source package in Noble:
Fix Committed
Bug description:
[Impact]
There is currently no comment in the default /etc/ssh/sshd_config
explaining that a systemctl daemon-reload is needed for changes to
Port etc. to take effect when systemd socket activation is used (the
default on Ubuntu).
Users may change e.g. Port in /etc/ssh/sshd_config and expect
systemctl restart ssh.service to reflect the change, but this will not
work.
[Test Plan]
1. The proposed fix here is to improve the documentation by adding a
comment above the default Port setting in /etc/ssh/sshd_config. Hence,
the test is to simply install openssh-server from noble-proposed, and
verify that the comment is there.
2. Because the patch changes the default sshd_config, and
debian/openssh-server.ucf-md5sum needs to be updated when this
happens, an upgrade from noble to oracular should be done after
installing openssh-server from noble-proposed. If a debconf prompt is
shown, then a mistake was made in recording the checksums. Otherwise,
they are correct.
[Where problems could occur]
There is low technical risk, but we should be sure that the
documentation is clear and improves the experience of users. It could
be harmful if the documentation accidentally makes things worse, or is
just confusing.
Also, a packaging quirk of openssh-server is that checksums of the
patched sshd_config (along with certain settings tweaked) need to be
recorded in debian/openssh-server.ucf-md5sum to avoid unnecessary
debconf prompts on upgrades. I have updated those checksums, but if
they are incorrent, then in future upgrades users might see an
unnecessary debconf prompt about /etc/ssh/sshd_config.
[Original 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
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/2069041/+subscriptions