Dyn issues affecting joint customers

This post addresses an ongoing large-scale Denial-of-Service attack against Dyn DNS, which may affect joint Cloudflare and Dyn customers. It explains that CNAME records pointing to Dyn-hosted zones can cause website unavailability (1001 error) due to failed DNS queries to Dyn. Workarounds include updating Cloudflare DNS records from CNAMEs to A/AAAA records pointing directly to the origin IP, or migrating the authoritative DNS hosting to Cloudflare. The post also notes that Cloudflare's status page and support system might be affected due to their reliance on third-party hosting.