[ntp:questions] NTP server with no network, no GPS signal
yan at seiner.com
Fri Apr 29 12:26:46 UTC 2011
Cristian Seres wrote:
> I am looking for a solution to install an NTP server in a very
> restricted network which can not be connected to other networks even
> through a firewall because of strict security policy. RS232 and usb
> are ok. Using GPS or DCF77 reference clocks would require a long
> antenna wire to get signal. Installing the antenna cable would be
> expensive, but there is good LAN cabling between a space with good GPS
> signal and the room with high security.
> What kind of cheap solutions would you think of? For instance, is it
> possible to feed time signal from one NTP server to another via
> RS232/usb? Or is there an affordable usb/rs232 reference clock which
> has an IP based separate antenna unit?
> With best regards,
Get a wifi access point that's supported by OpenWRT and has a USB port.
Install OpenWRT. Install gpsd and ntpd. Get a gps USB puck. Set up
access point in room with good gps reception. Use the AP as the ntpd
server. It works quite well and is quite reliable and cheap.
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