How to view blocking incoming requests on a Mac?

Question

When I program on my Mac laptop, sometimes it asks me if I want to accept incoming connections etc.

If I say no, I might want to change my decision later on.

Where can I see these firewall blocks?

Answer 1

• Go to System Preferences - Security - Firewall
• Unlock your settings if necessary using the lock symbol in the lower left.
• Click the "Advanced" button

Here you have a list of all rules set up:

You can then add rules for applications using the + button or remove some by selecting them in the list and clicking the - button.