Re: [chrony-users] Query regarding "Broadcasting of NTP packets on LAN"

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Thanks Bill a lot !!!!
I could make the use-case work, as per your instructions :)

Thanks a ton, again !!!!

On Thu, Aug 15, 2013 at 7:43 PM, Ajay Garg <ajaygargnsit@xxxxxxxxx> wrote:

On Thu, Aug 15, 2013 at 7:24 PM, Bill Unruh <unruh@xxxxxxxxxxxxxx> wrote:
On Thu, 15 Aug 2013, Ajay Garg wrote:

Hi all.

First, let's me detail the use-case :)


We have a server, S1, which has two interfaces, I1 and I2.
I1 is the gateway to the internet, while I2 is exposed to a LAN.

Thus, installing "chrony" on S1, and then starting "chronyd" works like a
charm on S1.

Now, clients C1, C2, .... Cn are computers, connected via LAN.
Thus, all of C1, C2, ..... Cn can communicate with S1, but cannot
communicate to the internet.

It is desired for C1, C2, ... Cn to synchronise their times, using S1 as
their "time server".


I noted, which implies
that the above use-case might indeed be possible to be solved.
However, I could not find any details in the FAQ.

Set up C1's internal IP address as the server for the other machines.

You meant "S1's internal IP address", right? :)

sure that on C1 those IP addresses of the internal lan  are allowed as clients.

Again, you meant "Make sure that on S1" right? :)


Any starting points? :)

in chrony.conf of the toher machines
 and on S1
allow 192.168

Should it be
                            allow 192.168

                            allow 192.168/16


(assuming that the internal subnet is 192.16.x.x and that S1's address on
theinternal subnet is

Read /usr/share/doc/chrony/chrony.txt

Thanks again !!!
(Right now, I have not got it working, but I haven't read "/usr/share/doc/chrony/chrony.txt" too :P


I will be really grateful :)

Thanks and Regards,

William G. Unruh   |  Canadian Institute for|     Tel: +1(604)822-3273
Physics&Astronomy  |     Advanced Research  |     Fax: +1(604)822-5324
UBC, Vancouver,BC  |   Program in Cosmology |     unruh@xxxxxxxxxxxxxx
Canada V6T 1Z1     |      and Gravity       |

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