Cloud-based Censorship Resistant I2P Reseeding

From early March until April, 2019, we conducted measurements from 1.7K network locations located in 164 countries to examine the accessibility of four different I2P services: the official homepage, its mirror site, reseed servers, and active relays in the network. We could identify blocking attempts in five countries. China consistently hinders access to I2P by poisoning DNS resolutions of the I2P homepage and reseed servers; SNI-based blocking was detected in Oman and Qatar when accessing the I2P homepage over HTTPS; TCP packet injection was detected in Iran, Oman, Qatar, and Kuwait when visiting the mirror site via HTTP; and explicit block pages were discovered when visiting the mirror site from Oman, Qatar, and Kuwait.