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I am trying to follow this answer on OS X 11.x

block return from any to 192.0.2.2

The console displays :

-bash: block: command not found

So, I tried to install it using brew: 

brew install block

However, I got another error .

  • How to install this firewall utility?
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Abdennour TOUMI
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1 Answers1

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On recent versions of OS X, pf is installed and running by default. The linked question is referring to changing the pf configuration, not installing a new utility. Modifying a firewall on a production system is not something which should be done without reading the documentation (man pf.conf , man pfctl).

To add that block line (or experiment with other configuration changes), you would add it to the configuration file /etc/pf.conf with your preferred editor, and then reload the firewall configuration with

$ sudo pfctl -f /etc/pf.conf
user4556274
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