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[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issue please contact him.] ** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/1674330 Title: Please consider dropping /etc/network/if-up.d/openssh-server Status in openssh package in Ubuntu: In Progress Bug description: The /etc/network/if-up.d/openssh-server hack was introduced ten years ago [1] as a response to bug 103436. At least from today's perspective this isn't justified: I can't seem to be able to actually reproduce that issue: I can start a VM with no network interfaces, remove the above hack, then start sshd, then bring up an ethernet interface, and I can connect to ssh via ethernet just fine. Also, e. g. Fedora has no counterpart of this hack, and these days a lot of people would complain if that would cause problems, as hotpluggable/roaming network devices are everywhere. The hack introduces a race: you run into connection errors after bringing up a new interface as sshd stops listening briefly while being reloaded. That's the reason why I looked at it, as this regularly happens in upstream's cockpit integration tests. Also, /etc/network/if-up.d/ isn't being run when using networkd/netplan, i. e. in more recent Ubuntnu cloud instances. So far this doesn't seem to have caused any issues. I asked the original reporter of bug 103436 for some details, and to check whether that hack is still necessary. There is actually a proposed patch upstream [2] to use IP_FREEBIND, which is the modern solution to listening to all "future" interfaces as well. But at least for the majority of cases it seems to work fine without that even. So I wonder if it's time to bury that hack? [1] https://anonscm.debian.org/cgit/pkg-ssh/openssh.git/commit/?id=ba6b55ed6 [2] https://bugzilla.mindrot.org/show_bug.cgi?id=2512 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1674330/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
