[Bug 2512] Use IP_FREEBIND if available for sshd listening socket

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2512

--- Comment #5 from Jakub Jelen <jjelen at redhat.com> ---
(In reply to Damien Miller from comment #4)
> (In reply to Jakub Jelen from comment #3)
> 
> > You can set the dependency on network-online.target, but it brings
> > other dependencies in the boot sequence and slows down the boot.
> 
> Doesn't this only affect users who change ListenAddress from the
> wildcard default? If so, can't they simply choose between
> wildcard+early or bound+depends-on-network-online?

Yes, you are right. Default wildcard works fine.

On machines with more network interfaces you are more liable to start
fiddling with ListenAddress.
Using IP_FREEBIND sounds like a reasonable alternative to the second
one.

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