I'll explain why we use OpenBSD, how we do so and how we automate management of a large number of OpenBSD servers. In particular, we'll cover -Benefits of using OpenBSD for mission critical, public internet services -how we manage a large number of OpenBSD servers in very different roles -automated installation / setup -the expected use: routers, firewalls -managing the layer 2 network components -using OpenBSD components for the shared webhosting platforms -a clustered mail system on OpenBSD, including the use of spamd -OpenBSD autoinstallation in a fully automated VM deployment scheme -secure the business: automated billing and bookkeeping, including largely automated payment systems and bank interfaces, all on OpenBSD -secure the site: physical access control using OpenBSD and arduinos -manually switching lights on and off is so last century -the environment: monitoring physical doors and temperatures with OpenBSD and arduinos I will focus on the technical side; it will NOT be a sales pitch or advertising session.