Adding Additional IPv6 Addresses on Hetzner Cloud Servers (Debian 12/13)
Configuring additional IPv6 addresses on Hetzner Cloud servers running Debian 12/13 requires a careful approach to work harmoniously with cloud-init. This guide is an updated version of my previous tutorial, reflecting lessons learned from production deployments and providing a more reliable method that avoids common pitfalls. What’s changed since the original guide: Note: These instructions…