[ntp:questions] Re: NTP sync on a standalone network (Windows 2k)
Richard B. Gilbert
rgilbert88 at comcast.net
Sat Aug 19 00:04:58 UTC 2006
Alexandre Carrausse wrote:
> "Wolfgang S. Rupprecht"
> <wolfgang+gnus20060818T141853 at dailyplanet.dontspam.wsrcc.com> wrote in
> message news:87mza1zqnv.fsf at bonnet.wsrcc.com...
>>If you are allowed to have fiber-optical signals go into the room (but
>>not out) you might be able to run a GPS in some not quite so secure
>>area and send only the NMEA and/or PPS into the secure area.
> I agree but the link between the GPS antenna and the secure area will be
> coper, not fiber.
> Are you aware of a GPS solution that would use fiber?
If you are allowed to have a fiber optic link but not a copper link you
could run NTP over the fiber link! I'm not aware of any refclock that
uses a fiber optic output but if you can put a fiber optic Ethernet NIC
in a PC outside and a PC inside and connect the two. . . . If the
inside machine runs a firewall that only allows the NTP protocol to and
from port 123 only. . . . Fiber optic NIC's are rare and expensive but
there are, or were, such things.
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