Welcome to stratum 0 ntp.remco.org

News!! Remotely monitored as of June 18th, 2008

Accuracy of freebsd, my open access pool.NTP server,
disciplined by FreeBSD, a Rockwell Jupiter GPS, and .. . Guzzi.

Accuracy of ntp2.remco.org. Disciplined by LinuxPPS, and Oncore VP GPS.


Technical details / specifications:
ntp.remco.org (i.e. ‘freebsd’): FreeBSD Rel 7.0 with PPS_SYNC kernel, and ntpd-4.2.5p113.
ntp2.remco.org: Linux 2.6.27.6 with LinuxPPS nano kernel and ntpd-4.2.5p113

External references for helium (primary ntp server, i.e. ntp.remco.org):
GPS + PPS: Rockwell Jupiter or Motorola Oncore UT+ GPS timing receivers
CET (backup): DCF77 receiver module

External reference for ntp2.remco.org:
GPS + PPS: Motorola Oncore VP GPS timing receiver

Access policy for ntp*.remco.org time/ntp servers:
Open access, but…. please notify ntp @ remco.org for permanent associations
e.g. when you run a ntp server and want to use ntp*.remco.org as stratum 1 reference(s).
Please no bursting. Do not poll more than once per 64 secs (i.e. minpoll 6).

Disclaimer:
Although ntp*.remco.org machines try to be as accurate as possible,
NO rights and/or responsibilities can be derived from these free ntp*.remco.org services.

History:

  • 2008 nov 15: upgraded ntp2 from DCF77 to GPS timing and added stats here
  • 2008 june 12: FreeBSD 7.0 with PPS_SYNC and Jupiter GPS is now the primary ntp server.
    Stats can be viewed here.
  • 2008 june 07: lithium has one DCF77 receiver but two drivers. GENERIC (DCFa) and radioclkd2 (DCFb).
  • 2008 may 02: switched to LinuxPPS *and* low level IRQ patched kernel 2.6.25.1
  • 2008 apr 16: switched to Motorola Oncore UT+ timing receiver for helium and back to LinuxPPS
  • 2008 mar 24: changed reference for lithium from CET (DCF77) to GMT (MSF60)
  • 2008 mar 23: upgraded to ntpd-dev-4.2.5p113, and switched to shmpps (refid GPPS)
  • 2008 feb 28: reconnected Jupiter Rockwell GPS (refid GPPS)
  • 2008 feb 23: connected Rubidium standard (refid Rb87)
  • 2008 feb 21: added traffic stats (packets/sec)
  • 2008 feb 18: ntp packets have minimal delay in HTB (”wondershaper“) queues:

    • # NTP (UDP protocol 17, port 123):
    tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
    match udp dst 123 0xffff \
    match ip protocol 17 0xff flowid 1:10