On Mon, Dec 26, 2016 at 11:04:22PM -0500, Robert Moskowitz wrote:
This is for centos 7 that has chronyd 2.1.1
I am looking into how to use chronyd as my local ntp server.
On my old servers with ntpd I had local access control lines like:
restrict 192.168.128.0 mask 255.255.255.0 nomodify notrap
But in looking for documentation on chronyd I did not find anything on this at:
https://chrony.tuxfamily.org/doc/2.1/manual.html
In the actual /etc/chronyd.conf there is the sample line:
# Allow NTP client access from local network. #allow 192.168/16
Does this allow only allow queries? Does chronyd support the 'restrict' option?
Robert:
Years back I used to use Chrony for that purpose (when I was running Smoothwall on an old PC instead of a commercial router, as I am now) and it did the job remarkably well.
One of the designgoals of Chrony was to support networks or computers that are NOT connected full-time, so that time stayed somewhere near correct even if offline for hours or days.
But that having been so long ago, now, I don't remember the details.
I also don't remember what the "restrict" directive for ntpd does.
(to give you an idea of how long ago that was it was when I had a Red Hat 7.2 or 7.3 workstation as my home PC--pre-RHEL. I could compile things on that RH box, tar up the necessary results and take that file to the smoothwall box and untar them and with small configuration: voila!)
there used to be a chrony mailing list where one could ask such questions, but I haven't seen traffic on it in years, so it may no longer exist.
Fred