Mastodon says its flagship server was hit by a DDoS attack

Mastodon's flagship mastodon.social server was hit by a DDoS attack on Monday, causing intermittent outages and error messages. Countermeasures were implemented by 9:05 a.m. ET, though some instability continued. The attack follows a similar multi-day DDoS campaign against Bluesky the previous week. Notably, smaller Mastodon instances were unaffected, highlighting a resilience benefit of decentralized architectures. DDoS attacks flood servers with junk traffic to knock them offline without stealing data.