Cloudflare, an internet service that is supposed to keep websites up and running, was down itself Sunday, taking dozens of websites and online services along with it.

Hulu, the PlayStation Network, Xbox Live, Feedly, Discord, and dozens of other services reported connectivity problems Sunday morning. Cloudflare said the problem was with a third-party “transit provider,” and its service was becoming increasingly stable over the course of the day.

DownDetector, which displays reports of internet and service outages, showed that reports of internet connectivity came in across the United States and Europe Sunday morning.

Services like Cloudflare are designed to prevent direct denial of service attacks, in which massive networks of computers send malicious traffic to websites to take them offline. The services also help keep sites running smoothly when traffic spikes during shopping seasons or when a site hosts a viral video.