It's deny by default, you get a popup when something wants to make a connection, then you can allow. Pre-built binaries available. It's my go-to since many years
Microsoft Visual Studio 2019 or 2022
Wix v3.14 Toolset
Visual Studio extension for Wix v3 Toolset
To build the application... (You get the idea.)Because windows' built-in firewall is of static nature, and as such, useless in the personal firewall role.
In contrast, traditional third-party firewall programs for Windows were always fully interactive and would offer much finer control in that way. Something we would call a personal firewall. A personal firewall would allow users to inspect and control each and every network interaction (not just LISTEN).
Ever since I found a folder on my drive titled "xxx was here", back in 1999, on windows, I've been using a personal firewall. Changed many over the years, and now running Fort.
Fort is my current number one, for sure.
Such things have been around for ages - I remember getting a free license somehow for a host-based IDS back in the Windows Vista times (struggled to look it up but I believe it was SAX2 by Ax3soft). It had some interesting features but running on an underpowered laptop the overhead cost more frustration than it was worth.