Apparently 2 out of 3 of our GPS clocks were being used in a spoof/DDOS attack. The basic premise is that time requests are sent to the service with a spoofed IP for the response. Add in 100/1000/10000 clocks send results to a server/service that did not request them results […]
Use Chris’ PPS kernel (until I have time or am compelled to compile my own). Compile ntp 4.2.6p5 as follows (from aquarat): But first: apt-get install libcap-dev ./configure –enable-ATOM –enable-NMEA –enable-linuxcaps; make; make install Disable TTY on /dev/AMA0 in /boot/cmdline.txt dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait Set baud rate in […]
Or, “Where the hell are we?!” Part 2: I recently bought a Nuvi 255W for some business travel coming up. I didn’t want to install Map Source since I don’t plan on buying any map packs any time soon. What I found was Garmin Communicator. Windows: Straight forward download and […]
The gps.kulish.com FQDN will be re-directed to our backup stratum 2 server during a short maintenance window from 1700 – 2000 CDT US. ntp pool clients should see no interruption in services. However, this means that kulish.com will be providing a stratum 2 time source while the gps is offline. […]
Host1:~# ntpq -p remote refid st t when poll reach delay offset jitter ========================================================== -navobs1.oar.net .USNO. 1 u 958 1024 377 89.425 -6.073 0.695 *navobs1.gatech. .GPS. 1 u 183 1024 375 82.102 1.639 0.281 -NAVOBS1.MIT.EDU .PSC. 1 u 895 1024 377 90.912 -0.207 0.368 +navobs1.wustl.e .GPS. 1 u 48 1024 […]