An internet blackout that knocked out some of the world’s biggest websites on Tuesday was ultimately caused by a single customer updating their settings, the infrastructure provider Fastly has revealed.
A bug in Fastly’s code introduced in mid-May had lain dormant until Tuesday morning, according to Nick Rockwell, the company’s head of engineering and infrastructure. When the unnamed customer updated their settings, it triggered the flaw, which ultimately took down 85% of the company’s network.
“On May 12, we began a software deployment that introduced a bug that could be triggered by a specific customer configuration under specific circumstances,” Rockwell said. “Early June 8, a customer pushed a valid configuration change
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