[ntp:questions] NTP Time Server for LAN: Broadcasting or Not?
brad at stop.mail-abuse.org
Mon Oct 4 08:52:00 UTC 2004
At 3:16 AM -0500 2004-10-04, W. D. wrote:
> +navobs1.wustl.e .USNO. 1 u 41 64 333 178.181 -51.694
> +india.colorado. .ACTS. 1 u 37 64 377 192.120 84.779
> *navobs1.oar.net .USNO. 1 u 106 64 376 191.750 114.124
> +now.cis.okstate .PSC. 1 u 40 64 377 192.337 118.809
These are all Stratum 1 time servers, some of which are
"restricted access", and at least one of which doesn't seem to be
advertised as a publicly accessible Stratum 1 time server on the
official list at
You need to re-read the "Rules of Engagement" page at
<http://ntp.isc.org/bin/view/Servers/RulesOfEngagement> and make sure
you comply with all the restrictions and requirements thereon.
While you're at it, you should also read the community supported
documentation at <http://ntp.isc.org/bin/view/Support/WebHome>,
especially the page at
> 192.168.2.255 .BCST. 16 u - 64 0 0.000 0.000
This appears to be a local Stratum 1 time server that you have
set up on a nearby network (it uses RFC 1918 private networking
space), but which appears to be non-functional. You might want to
look into getting this fixed.
> How does one tell if this server is broadcasting properly?
You check your clients that are supposed to be receiving those
broadcasts, and see if they are.
> Also, the '*' and '+' tend to disappear and reappear. Is this
> possibly due to network congestion?
Read the official documentation page at
<http://www.eecis.udel.edu/~mills/ntp/html/ntpq.html>, and pay close
attention to the "Tally Codes" section.
Brad Knowles, <brad at stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
SAGE member since 1995. See <http://www.sage.org/> for more info.
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