[systemd-devel] systemd-timesyncd - use unprivileged ports

[Mantas Mikulėnas]

On Tue, Mar 31, 2020, 22:40 Reindl Harald <h.reindl at thelounge.net> wrote:

>
>
> Am 31.03.20 um 20:32 schrieb Jędrzej Dudkiewicz:
> > but I understand that
> > systemd-timesyncd always uses unprivileged source port?
> what else?
>

NTP has a "Symmetric Active" mode, where both peers use port 123 as source
*and* destination.

(It even seems that old NTPv1 actually determined the mode based on nothing
else but sport&dport.)
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