[ntp:questions] ntpd on dial up machine: no DNS resolving => giving up on all servers
mayer at ntp.org
Sat Jun 6 22:16:59 UTC 2009
Arno Wald wrote:
> i am using ntpd (4.2.4p6+dfsg-1; debian/sid) on a PC with dial up
> connection. The PC is not online at boot time, but is turned online manually
> when required via pppd.
> ntpd is started at boot time and automatically can handle interfaces that
> are brought up or down while ntpd is running since 4.2.4p0+dfsg-1. But the
> problem is, that ntpd cannot resolve the ntp-server names at startup
> (because the PC is offline) and gives up on them. When the ppp interface is
> brough up, ntpd does recognize this, but does not retry to resolve the
> I cannot find a configuration option to change this. Is there something I
> can do to make ntpd look up the servers again when the PC is going online?
> An alternative was to (re)start ntpd on ip-up instead of starting it at boot
> time. The problem with this is that (if I am not wrong) ntpd does a big time
> step instead of just little time adjustments once. This can make the mail
> server dovecot stop if time is set back by too many seconds. So is there an
> option to forbid ntpd such a big time step at startup?
Soon. There code in the development branch which will help with this.
It's not as complete as it needs to be but it may help you.
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