Requests from Microsoft IP Addresses

[Mike Blacker]

Microsoft and GitHub have investigated the issue and determined that a
Github user updated a script within the FFMPeg-Builds project that pulled
content from https://gmplib.org. This build was configured to run parallel
simultaneous tests on 100 different types of computers/architectures. This
activity does not appear to be nefarious. GMPLIB appears to have limited
infrastructure that could not sustain the limited, yet simultaneous
requests.

Mike Blacker
Director
Threat Hunting, Operations, and Response
GitHub Security