Re: [ntp:questions] Number of servers needed to detect one falseticker?

2011-01-05 Thread Terje Mathisen
David L. Mills wrote: Miroslav, Nowhere in the documentation produced by me is the statement that the minimum number of servers to reliably find the truechimers is four. There might have been some confusion in the past, in particular with reference to Lamport's paper, which describes an algorith

[ntp:questions] set time in Linux client

2011-01-05 Thread RICCARDO
How can I set ntp Linux client to retrieve time from my ntp internal service ? By ntpd service in /etc/init.d or by inserting 'ntpd' in crontab ? ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions

[ntp:questions] set time in Llinux client

2011-01-05 Thread RICCARDO
How can I set ntp Linux client to retrieve time from my ntp internal service ? By ntpd service in /etc/init.d or by inserting 'ntpd' in crontab ? ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions

Re: [ntp:questions] Number of servers needed to detect one falseticker?

2011-01-05 Thread Miroslav Lichvar
On Wed, Jan 05, 2011 at 09:23:59AM +0100, Terje Mathisen wrote: > Two servers which don't overlap, and a third which overlaps (partly) > both of them: > > <> <> server A and B > <---> server C > > In this particular situation C must be a survivor, but since it > overlaps b

Re: [ntp:questions] set time in Llinux client

2011-01-05 Thread Steve Kostecke
On 2011-01-05, RICCARDO wrote: > How can I set ntp Linux client to retrieve time from my ntp internal > service ? ntpd both a client and a server. Just install the NTP package for your OS (or "distro"). It should contain all of the "glue" (init scripts, etc) to make NTP work for you. You will

Re: [ntp:questions] What version of ntpd am I really running??

2011-01-05 Thread Thomas Laus
> On Tue, Jan 4, 2011 at 23:30 UTC, Edward T. Mischanko > wrote: >> On my FreeBSD system have built and installed ntp-dev-4.2.7p108. >> But, when I type: >> >> ntpd --version >> >> It returns: >> >> ntpd - NTP daemon program - ver 4.2.4p5 >> >> What is the prper way to determine the current versio

Re: [ntp:questions] Number of servers needed to detect one falseticker?

2011-01-05 Thread David L. Mills
Terje, That's why Autokey uses digital signatures and zero-knowledge identity proofs. Dave Terje Mathisen wrote: David L. Mills wrote: Miroslav, Nowhere in the documentation produced by me is the statement that the minimum number of servers to reliably find the truechimers is four. There

Re: [ntp:questions] Number of servers needed to detect one falseticker?

2011-01-05 Thread David L. Mills
MIroslav, The select algorithm was changed in a very minor way to conform precisely to the formal assassin quoted in my previous message. It probably has very little practical significance. After all, the old algorithm has been going strong for nineteen years. Dave Miroslav Lichvar wrote:

Re: [ntp:questions] Number of servers needed to detect one falseticker?

2011-01-05 Thread Miroslav Lichvar
On Wed, Jan 05, 2011 at 10:31:15AM -0500, Brian Utterback wrote: > Let's equalize a bit to make it a bit more fair: > > > > > So, now, if you were NTP, which would you choose? You are correct in > your assessment that NTP would accept them all as truechimers. You are > correct also th

Re: [ntp:questions] NTP client with ability to write Windows NT system time to hardware clock?

2011-01-05 Thread Martin Burnicki
David, David J Taylor wrote: > Some extra reference points for you - I just checked on a couple of > Windows-7 64-bit systems: > > Intel D330 Atom PC (Molde): > QPC: 1.563 MHz, 51ns > (my own software shows 26ns for a GetTickCount call, and 51ns for QPC) > > Intel i5-760 PC (Alta) > QPC: 2.744 M

Re: [ntp:questions] Linux : ntp-dev-4.2.7p84 : Local clock not getting synced.

2011-01-05 Thread Martin Burnicki
Steve Kostecke wrote: > On 2011-01-04, Martin Burnicki wrote: > >> I also appreciate Heiko's suggestion for a new syntax. Hm his posting via >> the questions list has not yet made it to my news server. I'm wondering >> whether it will still appear ... > > http://groups.google.com/group/comp.pro

Re: [ntp:questions] NTP client with ability to write Windows NT system time to hardware clock?

2011-01-05 Thread Martin Burnicki
David, David J Taylor wrote: >> In fact I've heard of *nobody* except you, me, Danny, and Terje building >> ntpd on Windows ;-) > [] >> Regards, >> >> Martin > > Martin, > > I did attempt to do this with considerable help from the folk here, and I > think I even got as far as set of executables

Re: [ntp:questions] Number of servers needed to detect one falseticker?

2011-01-05 Thread David L. Mills
Terfe, Read the formal assertion carefully and examine the algorithm on the Select Algorithm page. The algorithm would return interval C as the smallest intersection with the largess number of contributors. Dave Terje Mathisen wrote: David L. Mills wrote: Miroslav, Nowhere in the docume

Re: [ntp:questions] Number of servers needed to detect one falseticker?

2011-01-05 Thread David L. Mills
Miroslav, According to your diagram, the algorithm would determine the intersection interval as interval a. The midpoints of all three intervals would be considered truechimers, since each of the intervals a, b and c, contain points in the intersection interval. Dave Miroslav Lichvar wrote:

Re: [ntp:questions] set time in Linux client

2011-01-05 Thread unruh
On 2011-01-05, RICCARDO wrote: > How can I set ntp Linux client to retrieve time from my ntp internal > service ? You had better tell us what this means. What is "my ntp internal service"? What ntp client. > > By ntpd service in /etc/init.d or by inserting 'ntpd' in crontab ? The prefered way is