[snom380]

The company I worked for had our office renovated/redecorated. As part of that, we moved offices temporarily, and one of the larger meeting rooms was relocated to a remote building. We didn't have a way of wiring up that meeting room to the rest of our office network, but building management were able to give us internet access in the room.

I wanted our employees to be able to roam to that meeting room transparently without any hassle. I knew that OpenVPN had a layer 2 tunneling mode, that could bridge two ethernet networks over VPN. With two leftover workstations, I set up an OpenVPN server in the main office, and an OpenVPN client at the meeting room. By bridging the OpenVPN interface to the ethernet interface on the client, I was able to connect a switch, WiFi access point and videoconferencing equipment. Everything worked perfectly, with even DHCP requests going over the VPN.