VMTN Blog, the official VMware blog, reports an interesting TechRepublic 4-parts article on how to set up a VMware lab environment to achieve videoconferencing with OpenBSD firewalls and Windows XP calling clients.

• Part 1: Introduction
• Part 2: Creating the OpenBSD virtual machines
• Part 3: Configuring the gateways
• Part 4: Setting it all up with teams