Re: [chrony-users] Re: NTS Server Setup with Let's Encrypt

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Hi !

Thanks a lot.... but i have actual no idea where to start with bug search...
the key is a rsa key from letsencrypt

and the setup un chrony

ntsserverkey /etc/chrony/cert/privkey.pem
ntsservercert /etc/chrony/cert/cert.pem
ntsdumpdir /var/lib/chrony

the chronyc -N serverstats says:

NTP packets received       : 35975673
NTP packets dropped        : 0
Command packets received   : 81
Command packets dropped    : 0
Client log records dropped : 15616714
NTS-KE connections accepted: 946
NTS-KE connections dropped : 0
Authenticated NTP packets  : 0
Interleaved NTP packets    : 110
NTP timestamps held        : 2403
NTP timestamp span         : 766138
NTP daemon RX timestamps   : 0
NTP daemon TX timestamps   : 35971583
NTP kernel RX timestamps   : 35971693
NTP kernel TX timestamps   : 110
NTP hardware RX timestamps : 0
NTP hardware TX timestamps : 0

Ciao Gerd

Am 24.04.2025 18:13, schrieb kross@xxxxxxxxxxxxxxxxxxxx:
Hello Gerd,

Assuming that your intention is to run an NTS server at the domain you
shared as part of your example, just fyi that it is accepting TCP
connections, but it seems it is not accepting TLS connections on the
default NTS-KE port. In case you're running chronyd (strong likelihood
given the forum), in my experience,  that can happen when chronyd is
not able to read one or more of the credential files, e.g., because
chronyd cannot find it/them in the place configured, or chronyd
doesn't have read rights for the file(s).

Kind regards,

Joachim

23.04.2025 11:37:09 kross@xxxxxxxxxxxxxxxxxxxx:

so why don't copy them before and give them the correct right ?

Sure, but why not let the deploy hook do that as well for you?

the hook is used to restart services

Yes, if that is all you tell it to do. But it can do more than that.


The deploy hook does whatever you tell it to do, as defined by the
script one places in the deploy subfolder.

Kind regards,

Joachim

23.04.2025 11:31:04 Gerd Hoerst <gerd@xxxxxxxxxx>:

Hi !

the hook is used to restart services (like apache/postfix/dovecot)
after a renewal (if there was no user right issue, you need also to
restart/reload chrony to use the new certs... so why don't copy them
before and give them the correct rights ?

Ciao Gerd
Am 22.04.25 um 23:51 schrieb kross@xxxxxxxxxxxxxxxxxxxx:
Why just do that in the renewal-hook/post script ?

Not sure I fully grasp your drift, so apologies if the following is
old news.

The point of the certbot renewal hook is automation of deployment.

Nothing wrong with manually keeping track of the validity of existing
certificates, e.g., periodically checking, setting a reminder
somewhere, having a tool that checks and alerts, or waiting until
someone or something alerts upon finding an expired certificate (as
you will have seen, Let's encrypt will cease sending reminders in the
near future). And then deploying manually (assuming certbot did an
automated renewal, or maybe do that manually as well).

But once the number of certificates to keep track of reaches a certain
level, or the thrill of learning the ropes, i.e., setting this up in
the first place, and going through the motions of deploying manually
after (manual or automated) renewal, diminishes after a few
iterations, automated deployment (after automated renewal) is your
friend.

As always, YMMV.

Kind regards,

Joachim

22.04.2025 22:50:06 Sviatoslav Feshchenko
<sviatoslav.feshchenko@xxxxxxxxx>:

This seem like a simpler solution! Thank you for sharing!

Sviatoslav

On Tuesday, April 22nd, 2025 at 3:32 AM, Gerd Hoerst
<gerd@xxxxxxxxxx> wrote:

Hi !

Why just do that in the renewal-hook/post script ?

cp -L /etc/letsencrypt/live/time.hoerst.net/cert.pem
/etc/chrony/cert/
cp -L /etc/letsencrypt/live/time.hoerst.net/privkey.pem
/etc/chrony/cert/
chmod g+r /etc/chrony/cert/*
systemctl restart chrony

Ciao Gerd
Am 20.04.25 um 19:40 schrieb kross@xxxxxxxxxxxxxxxxxxxx:
…

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