Scudo is a hybrid firewall for macOS that combines an inbound network layer packet filter with an outbound application layer firewall.
Scudo helps protect your Mac’s network services from unwanted connections from remote computers and increases your privacy and security by controlling the network activity of all applications / files, letting you choose which application / file can connect to the network.
Everything is controlled in one window, its use is really simple and safe. A detailed PDF manual is included.
Easy to install and run Protect your shared documents and network services Protect your privacy lock applications Pop-up notifications: define incoming and outgoing rules on the fly Limit channel loading Protect your network from known dangerous hosts using online blacklists Monitor connections and execution rules