Hi devels,
after few iterations with systemd people we managed to put together new
(instantiated by key) sshd-keygen service complying with packaging
guidelines and improving usability [1]. It is currently built for
Rawhide [2].
I understand it is not quite good time, but it would be great to push
this also into the Fedora 24 so we would not have to wait another
release cycle to test it properly. Let me know if you have some concerns
against updating F24 package in this phase, check the frequently asked
questions below, or answer this email.
QA session:
What is even the sshd-keygen service?
* It is one-shot service running during first boot, before starting
sshd server. It takes care of generating host keys and it also can
create you new host keys if you are interested in new set.
What was wrong with the old version?
* It was basically init.d script moved into the /sbin/
What is better on the new one?
* If you want to configure generation of different keys than default
set, you need to do that on three places:
* Modify AUTOCREATE_SERVER_KEYS in /etc/sysconfig/sshd
* Modify /etc/systemd/system/sshd-keygen.service to trigger script
* systemctl daemon-reload
* With new version, it should be possible to enable/disable key type
generation simply using
* systemctl enable sshd-keygen@dsa.service
What are changes to existing systems?
* Default installations should not notice any difference
* If you modified AUTOCREATE_SERVER_KEYS, you need to do appropriate
enable/disable for your interested key.
* New installations should create default keys as before.
Fedora 23?
* No, this change will not go into Fedora 23 to "break" existing setups.
If you have some more questions, add your own. Also comments are welcomed.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1325535
[2] http://koji.fedoraproject.org/koji/taskinfo?taskID=13645383
Regards,
--
Jakub Jelen
Associate Software Engineer
Security Technologies
Red Hat
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