On Fri, Oct 19, 2018 at 14:36:35 -0000, Manuel López-Ibáñez wrote:
> Both of them work. I don't understand how the last command can work and
> I may still be behind a firewall.

"ntpdate -d" sends packets using an unprivileged source port, so
a firewall could allow those packets but block outgoing packets from
ntpd itself, which use a source port of 123....

                                                        Nathan

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https://bugs.launchpad.net/bugs/1797872

Title:
  ntpd keeps Soliciting pool server

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