There's Lulu based on Apple's Network Extension framework but there are quite a few issues with the framework itself (it will briefly initiate a connection even

There's Lulu based on Apple's Network Extension framework but there are quite a few issues with the framework itself (it will briefly initiate a connection even though there's a deny rule for that address etc). https://github.com/objective-see/LuLu https://github.com/objective-see/LuLu