There are also NTP servers based on GPS (or the cell phone network which uses GPS). These can be on that detached network.
Kind regards, Rich You are born weak and frail, and you die weak and frail. What you do between those is up to you. > On Jun 3, 2024, at 15:28, gene heskett <ghesk...@shentel.net> wrote: > > On 6/3/24 11:56, Jon Elson wrote: >> I have several special-purpose devices based on machinekit on the Beagle >> Bone. >> In one case, we are using it in a hospital where they won't allow us to >> connect anything to their network. So, we set up a point to point Ethernet >> link between a laptop and the Beagle Bone. When starting LinuxCNC, there is >> a HUGE delay of about 10 minutes before the Axis GUI comes up. I think I >> have traced it to be caused by there being no NTP time server. I think we >> see the same delay with either a Linux or Windows computer used to access >> the Beagle. >> Does this ring a bell with anyone? Is there a workaround? (Process to kill >> or needs to be run?) >> Thanks for any hints, >> Jon > > There are two solutions Jon. The latest crop of ntp offerings can be both > client and server. ntpsec is one of them, and more difficult to setup but I > have it running on this machine as both client and server, so I am a stratum > 3 server to the rest of my stuff. Means I'm within a millisecond of the clock > in Co Springs. Chrony can also do that and may be easier to setup. Its > relatively easy to do so I'm not banging on debians pool of servers except > for this machine. Using chrony on all my pi clone stuff. > > Bypassing it can I'm sure be done, but the proper thing would be for the > hospital to setup its own ntp server and allow your machine access since > there are things that cannot be well done if the system clock is wrong. I'd > not be bashful about presenting that argument to the hospitals net > controller. Its not that hard, even for a winders system, to cut a single > ipv4 address into their system. You could even restrict that address to only > the ntp port #. It should of course be a non-routable address, someething in > the 192.168.xxx.yyy range. Any solution I would offer demands a net access. > It is important enough that its non-negotiable. > > Good luck > >> _______________________________________________ >> Emc-developers mailing list >> Emc-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-developers > > Cheers, Gene Heskett, CET. > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author, 1940) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > > > > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
