On March 7, 2024, tailscale.com experienced a 90-minute downtime due to an expired TLS certificate. This issue stemmed from a misconfiguration when migrating to a new hosting provider that does not support IPv6 natively. The expired certificates disrupted access to the site, affecting the Tailscale documentation, blog, and quick install script. Steps were taken to manually renew certificates and address the root issue with renewal. Despite the downtime, Tailscale’s design allowed most operations to continue uninterrupted for users. The company plans to improve its infrastructure to prevent similar outages in the future.
https://tailscale.com/blog/tls-outage-20240307