little-snitch@4

Install command: 
brew install --cask little-snitch@4

Name: Little Snitch

Host-based application firewall

https://www.obdev.at/products/littlesnitch/index.html

/api/cask/little-snitch@4.json (JSON API)

Cask code on GitHub

Current version: 4.6.1

Requires: macOS == 10.11 / 10.12 / 10.13 / 10.14 / 10.15

little-snitch@4 requires a kernel extension to work.
If the installation fails, retry after you enable it in:
    System Settings → Privacy & Security

For more information, refer to vendor documentation or this Apple Technical Note:
    https://developer.apple.com/library/content/technotes/tn2459/_index.html

You must reboot for the installation of little-snitch@4 to take effect.

Variations:

Intel mojave 4.5.2
high sierra 4.5.2
sierra 4.5.2
el capitan 4.5.2

Analytics:

Installs (30 days)
little-snitch@4 4
Installs (90 days)
little-snitch@4 4
Installs (365 days)
little-snitch@4 4
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