Web infrastructure provider says problem lasted half an hour and was not an attack, weeks after larger outage

A host of websites including LinkedIn, Zoom and Downdetector went offline on Friday morning after fresh problems at Cloudflare – the company’s second outage in less than a month.

Cloudflare said the outage came after it adjusted its firewall to protect customers from a widespread software vulnerability revealed earlier this week, and was not an attack. Earlier, it noted a separate issue reported with its application programming interfaces.