Abstract. China filters Internet traffic in and out of the country. In order to circumvent the firewall, it is helpful to know where the filtering occurs. In this work, we explore the AS-level topology of China's network, and probe the firewall to find the locations of filtering devices. We find that even though most filtering occurs in border ASes, choke points also exist in many provincial networks. The result suggests that two major ISPs in China have different approaches placing filtering devices.
Xu et al. REF explore the ASlevel topology of China's network infrastructure, and probe the firewall to find the locations of filtering devices, finding that even though most filtering occurs in border ASes, choke points also exist in many provincial networks.
Internet Censorship in China: Where Does the Filtering Occur?
PAM
Computer Science