Here, we will look at an example of what you can dig in via Firewalla. Let's take a simple device, a Nest camera.
This is an example of a well-behaving device, where it only communicates to its own cloud.
First Let's tap on Device Button, this will launch Devices View. Then tap on the device Nest.
Next, we can go into View Deep Insights, and you will be able to see the history of what this device been doing.
All the domain list ends with nest.com ... likely it is all safe.
You can also see things like Nest query for weather via weather.nest.com, and send logs to log-*.nest.com
Next, let's tap on Upload, this will list out all the top upload's. The first entry is a bit blurry, we can tap into it and see Nest been uploading 600MB of data to nest cloud. This is likely the video stream that Nest is storing in the cloud. (the service that they charge you the monthly fee)