MurusLite is the entry level firewall front end. Everybody can download it and use it for free. It features inbound filtering and logging and can be used to protect services running on the Mac. Despite being free MurusLite is not a tryout or demo. It is a full featured app and is a good starting point for the novice user.
macOS features one of the best network firewalls: PF (Packet Filter). It comes in an under the hood fashion, installed and disabled by default. Murus purpose is to unleash its potential. With its easy and intuitive icons-based and drag&drop-based interface, visual layers of abstraction and a friendly view of the PF firewall its a lean and mean tool to protect your Mac and network.
Designed with ease of use in mind, yet full of advanced options and monitoring tools, Murus is perfect for everybody; from the average user to the experienced UNIX guru/system administrator and even for educational purposes.
Configure and start the PF firewall in one click using built-in presets, use Murus graphical ruleset editor design tool or write fully customized rulesets using the advanced rule editor.
Murus Pro includes Vallum, an application-layer firewall. This allows you to take full control of your Mac at both application and network level.