ipfirewall - Wikipedia
How to View & Watch the Firewall Log in Mac OS X Hit Command+Spacebar to bring up Spotlight and type in “Console”, then hit return on Console app … Vallum - macOS Application Firewall The macOS built-in firewall can be activated from System Preferences to block inbound connections. Vallum adds the ability to block outbound connections, so it is the perfect companion for the macOS firewall and they can be used together. How to enable and disable Firewall on Mac - MacPaw May 24, 2018 How to Allow Apps to Communicate Through Your Mac’s Firewall
OS X: Turn firewall on or off from the command line
The Best Free Firewall Software app downloads for Mac: LuLu TCPBlock NoobProof Portscanner Murus Lite EasyVPN Radio Silence DoorStop X Security Suite Using the Built-in Firewall in Mac OS X Panther - dummies (The firewall on the Mac will only block or allow TCP/IP traffic — not AppleTalk — so AppleTalk traffic is always able to get in.) When enabled, the firewall, by default, will block all traffic that comes into your Mac — by default, however, the firewall is turned off. So, your first job is to enable the firewall… macOS Sierra: Enabling Your Mac's Firewall and Stealth
After entering the command you will be asked to accept incoming network connections for nc by the Application Firewall. To connect to nc listening at port 12345 from remote simply enter nc hostname 12345 on a second host (replace hostname with the host name of the Mac running nc).
Mac OS X comes with a built-in firewall service that can be used to protect your Mac from online security risks. The firewall sits between OS X and the internet and only allows incoming traffic to How to View & Watch the Firewall Log in Mac OS X Hit Command+Spacebar to bring up Spotlight and type in “Console”, then hit return on Console app … Vallum - macOS Application Firewall