GPS is central to a lot of aspects of the systems we deal with on a day-to-day basis. Be it Uber or Tinder through to aviation and “air gapped” networks running GPS based NTP servers. GPS Spoofing is now a thing and can be done with minimal effort. This raises some concerns when GPS is depended upon by safety of life applications. This presentation will look at the process for GPS spoofing, how we can detect GPS spoofing and trolling NTPd and the services that rely/assume that time only moves forward.