The data centers used for Masto.host are from OVH and are located in France.
All servers run Debian.
The TLS (https) included are provided by Let's Encrypt.
Other software used: Node.js + Redis + PostgresSQL + Ruby + Nginx + Docker + OpenStack Swift.
Shared Hosting Infrastructure
Each Private VLAN can only communicate with the closest VLAN (in the graph) and under a specific number of ports.
The media storage (Object Storage) is hosted directly with OVH and is completely independent from the Masto.host cloud.