Public DNS (PDNS) Open resolvers are used by networks operators to resolve domain names. Examples of public open DNS resolvers are (Cloudflare 220.127.116.11, Google 18.104.22.168, IBM 22.214.171.124, etc). Those PDNS are anycast servers and are generally protected against DDOS attacks, but other openly accessible DNS resolvers (usually hosted by network operators) are considered to be a serious security threat as they can be used to launch massive DDOS attacks. The best practice is not to operate an Open DNS resolver unless you are a PDNS with the required level of security.
This project is about unveiling the current open DNS resolvers in the AFRINIC IP space (both IPv4 and IPv6) and visualize them on a map. This project involves running measurements to detect open resolvers, maintain a database and develop a front-end to visualize the results.
Keywords: DNS, open resolvers, DDOS
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