In this chapter, we will use a software package called Yaler to monitor our home network and alarm system from anywhere in the world where we can get an IP address. That's right; you can be at a café on the sidewalk in Paris and turn on the lawn sprinklers back in Houston.
Yaler is an Internet relay site, which allows you to access your BeagleBone from any device with a web browser or an SSH client, or both. The Yaler project was set up specifically to serve the users of BeagleBone and Raspberry Pi. Yaler allows you to access your BeagleBone even though it is shielded by your home or office firewall.
Normal access
Under normal circumstances, your firewall or mobile router blocks the access to your alarm system. In this case, Yaler acts as a secure "man in the middle", who handles two-way communication between your web client and your alarm system.
Yaler access