Related:

Quack: Scalable Remote Measurement of Application-Layer Censorship:

https://www.usenix.org/system/files/conference/usenixsecurit...

Global Measurement of DNS Manipulation:

https://www.usenix.org/system/files/conference/usenixsecurit...

Reachability index of Internet blockade circumvention tools:

https://explorer.ooni.org/circumvention

Psiphon:

https://forge.psiphon.ca/en/what-is-psiphon