It seems to me that the days when running a GPS refclock into an NTP server was exotic are long past. Why don't providers give NTP stratum 1 service to their customers? Then I can at least shed some of the most suspect clients (it's the routing path not the user that is suspect.)

In search of good time for all, Jerry

I looked into setting up a WWV based refclock a few months back for a client. We were unable to find a WWV capable clock for under a few thousand dollars. The old Heathkit one ($300 or so?) was no longer available and all of the other ones I found mentioned in the xntp docs were in the thousands. You mention using a GPS clock, while I've been looking into WWV. Can you point me to some, hopefully inexpensive, hardware that we could use to provide this service? -David