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