Setting Up and Securing a Small Network with OpenBSD

It is often difficult for a small business to figure out how to build a network with all of the services that they need. Often they have their network services managed by an ISP or a consulting company. By bringing their network services in house, they will gain the advantage of being able to make changes at their leisure and have the security of being able to easily review and audit their configurations for compliance with security policies. This paper intends to show how to setup a stable and secure small network, while keeping everything in house. I will cover setting up a small network and essential services for network connectivity and functionality. This will detail the most basic services that a small network is likely to need: DHCP, DNS, Email, Firewall, Network Address Translation, a POP server, and a Web Server. I will cover each in enough depth to provide a basic setup and understanding of the service.