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A Cloudflare outage on Friday morning caused many popular websites to become unreachable.

The company stated the issue was caused by a change to its firewall system, not an attack.

This was the second major Cloudflare outage in recent weeks, following a similar event in November.

Early-morning internet users at LinkedIn, Shopify, DoorDash and Substack ran into an increasingly familiar problem Friday, Dec. 5. Websites were down, and "500 Internal Server Error" were popping up everywhere. A significant amount of the internet was unreachable.

Portions of , an internet management company many websites rely on for their security or domain name management, were down. Again.

Downdetector, a site that monitors website reports, noted that and dropped after about an hour, a

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