http://magma.ua4vjlx72wv5crhkificaeysp62hizhazipfshsdvs6jxqvhtkpllcad.onion/guide/network-measurements.html
Archived PDF version VPNs are Using Fake Server Locations, Sven Taylor Zachary Weinberg, Shinyoung Cho, Nicolas Christin, Vyas Sekar, and Phillipa
Gill. 2018. How to Catch when Proxies Lie: Verifying the Physical Locations of
Network Proxies with Active Geolocation. In 2018 Internet Measurement
Conference (IMC ’18), October 31November 2, 2018, Boston, MA, USA.