I don't take credit for the work, goes to TEAM ZWT, I'm just uploading this working keygen, so you can enjoy it just like I did.
Just go to Zonealarms homepage
download a trial version of this nice product, then install it. After install run the keygen and choose the product you need a key for and paste it as a new license. This will give you a working key for the next 50.000+ days (Yes 50k + days ^^)