[ntp:questions] ntp-4.2.6p2 doesn't sync with Autokey

Dave Hart hart at ntp.org
Mon Oct 18 13:52:50 UTC 2010

On Sun, Oct 17, 2010 at 03:43 UTC, Joe Smithian <joe.smithian at gmail.com> wrote:
> I've compiled ntp-4.2.6p2 from the source code with crypto, openssl and
> autokey enabled on CentOS 5.4 platform. I've configured my CentOS 5.4 client
> to use Autokey but it doesn't sync as you can see below.

What I see looks normal, given your configuration.  Linux
distributions in particular seem to include the local clock driver ill-advisedly, and you are the latest victim.  You have
instructed both your client and autokey server to freewheel using the
PC's clock while claiming to be synchronized.  Unless some other
software is disciplining that clock outside of ntpd, you probably
don't want that.

> Authentication is OK but it rejects the trusted server.

Right, so if you remove from the client's configuration,
it should sync to its single remaining source.

> I've done the same configuration using
> ntp-4.2.4p5 on an old RedHat 7.2 machine and it syncs to the same trusted
> server. So I guess the problem might be in the new version of NTP.

There was a three-year-long development process between 4.2.4 and
4.2.6 stable releases.  During that time, autokey was substantially
updated.  Configurations that worked with 4.2.4 may not work with
4.2.6 without change.

Good luck,
Dave Hart

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