Wolfgang Hottgenroth
b2249c06e9
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38 lines
1.3 KiB
Markdown
38 lines
1.3 KiB
Markdown
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title: Stratum 1 NTP Server participating in ntppool.org
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date: 2025-03-13
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-->
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[Details at ntppool.org](https://www.ntppool.org/scores/93.241.86.156)
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## Harrison
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Setup details for this machine are here: [https://gitea.hottis.de/wn/harrison-setup](https://gitea.hottis.de/wn/harrison-setup).
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The snmpd subagent for monitoring the ntp daemon is here: [https://gitea.hottis.de/wn/snmp-agentx-ntpsec](https://gitea.hottis.de/wn/snmp-agentx-ntpsec).
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### Details of Setup
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A GPS receiver (ublox Neo-6M) is connected via a RS232 level converter (MAX232) and via the RS232 connection to a machine (it was not easy to find one with RS232) with a Debian installation.
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The PPS signal of the GPS receiver is transmitted via the DCD line of the RS232 connection. That in turn is evaluated by the NMEA line discipline of Linux.
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The GPS receiver is then configured as a reference clock in ntpsec:
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```
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refclock nmea unit 0 mode 0x10 minpoll 4 maxpoll 4 path /dev/ttyS0 ppspath /dev/pps0 baud 9600 flag1 1 flag2 1 flag3 0 refid LIgp
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```
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## David
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Details on the setup of this machine are described here: [https://minimal-setups.de/blog/timeserver/](https://minimal-setups.de/blog/timeserver/).
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