9/24/21, 8:39 PM The State of Internet Censorship in Myanmar | OONI Vanilla Tor test This test examines the reachability of the Tor network, which is designed for online anonymity and censorship circumvention. The Vanilla Tor test attempts to start a connection to the Tor network. If the test successfully bootstraps a connection within a predefined amount of seconds (300 by default), then Tor is considered to be reachable from the vantage point of the user. But if the test does not manage to establish a connection, then the Tor network is likely blocked within the tested network. WhatsApp test This test is designed to examine the reachability of both WhatsApp’s app and the WhatsApp web version within a network. OONI’s WhatsApp test attempts to perform an HTTP GET request, TCP connection and DNS lookup to WhatsApp’s endpoints, registration service and web version over the vantage point of the user. Based on this methodology, WhatsApp’s app is likely blocked if any of the following apply: TCP connections to WhatsApp’s endpoints fail; TCP connections to WhatsApp’s registration service fail; DNS lookups resolve to IP addresses that are not allocated to WhatsApp; HTTP requests to WhatsApp’s registration service do not send back a response to OONI’s servers. WhatsApp’s web interface (web.whatsapp.com) is likely if any of the following apply: TCP connections to web.whatsapp.com fail; DNS lookups illustrate that a different IP address has been allocated to web.whatsapp.com; HTTP requests to web.whatsapp.com do not send back a consistent response to OONI’s servers. Facebook Messenger test This test is designed to examine the reachability of Facebook Messenger within a tested network. OONI’s Facebook Messenger test attempts to perform a TCP connection and DNS lookup to Facebook’s endpoints over the vantage point of the user. Based on this methodology, Facebook Messenger is likely blocked if one or both of the following apply: TCP connections to Facebook’s endpoints fail; DNS lookups to domains associated to Facebook do not resolve to IP addresses allocated to Facebook. Data analysis Through its data pipeline, OONI processes all network measurements that it collects, including the following types of data: Country code https://ooni.org/post/myanmar-report/ 14/19