[ntp:questions] NTP daemon - fixed offset against real time

David Woolley david at ex.djwhome.demon.co.uk.invalid
Sat Jan 26 17:29:45 UTC 2008

msmucr at gmail.com wrote:
> i would like to ask you for help or ideas with one ntp related task.
> I need to setup one ntp server to serve its sntp clients
> with time, which is specific amount of time (several seconds) in

You would need to modify the source code to do that.  If you do so, 
please also overwrite the stratum, reported to clients, with 15, so that 
if anyone else does try to use you as a server, they won't be able to 
further distribute broken time.  (It may also be possible to set a silly 
root dispersion, if the SNTP clients are not too fussy about it, to 
completely stop NTP clients using the server adding your time offset to 
root dispersion would be reasonably honest, as long as it is more then 
one second.)

> advance against correct real time taken from another ntp server in
> network. I did some search in documentation from both ntpd and
> openntpd, but i didn't find any configuraition option related to this.

One wouldn't expect the facility to deliberately break them in this way.

> I need this quirky thing due to time syncing of several broadcast
> graphics servers which also generates clocks to TV picture and it is
> necessary to compensate delay caused by MPEG coding and transmission
> of TV signal.

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