Would you write your password on a piece of paper and stick it to your forehead? Probably not. Yet connecting to a public Wi-Fi network is almost as foolish.

You might not have any choice, however, if you’re on the road and want to stay connected. A VPN can keep you safe, but each device has to connect separately, unless you’re using a travel router as a go-between.

Don’t have one handy? Don’t worry, you can build one with a Raspberry Pi. It’s the perfect choice for a DIY VPN travel router, so let’s walk you through how to build one.