NTP Server GPS Source
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BACKGROUND
I haven't come across any recent posts discussing successfully adding GPS hardware for a NTP Server source, so I though I would ping the community.EXISING CONFIG
I already have pfSense serving time to my sub-net. My hardware (Protectli.com) has a COM port, USB ports, and an internal full length Mini-PCIe interface with external antenna punch outs.GOALS
Cost effective (sub ~$100), reasonably accurate (sub ~100 msec) GPS time source. I am not serving time for financial transactions, just time for 30+ systems (clients, servers, security system, cameras, etc.) in my home in the event of WAN loss (~1 week) and to reduce external NTP queries. Perhaps learn something in the process.OPTIONS (with or w/o PPS)
- External Serial GPS
- External USB
- Internal Mini-PCIe card with external antenna
QUESTIONS
- Is it even necessary to add GPS time source?
- What methods and devices have proven to work?
- Pros/cons of each?
- Has anyone got a VersaLogic Mini-PCIe card (u-blox) to work with pfSense?
https://www.versalogic.com/Products/PDF/DS-MPEu-G2.pdf - Or just buy something like a separate TimeMachine and be done with it?
https://timemachinescorp.com/product/gps-time-server-tm1000a/
Thanks in advance,
Elvis
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https://www.netgate.com/docs/pfsense/book/services/ntpd-gps.html
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This blows your budget but has worked well for us for many years. It's a standalone device, but we set our pf box up to use it as it's primary time source. Have not tried connecting via serial, only using NTP over the network.
https://timemachinescorp.com/product/gps-time-server-tm1000a/ -
This post is deleted! -
@mhab12 said in NTP Server GPS Source:
https://timemachinescorp.com/product/gps-time-server-tm1000a/
Thanks. I decided to forego the serial GPS and get the TM TM1000A
Simpler and less hassle.
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For those reading/upvoting this thread, I have since moved to a GPS puck with PPS output as a Stratum 0 source.
<10 usec offset/jitter for <$50