It’s not truth. You must read more about any ‘hole’ in ZA free version. At least you’re talking that the version has less feature than the Pro one. This is obvious. There is no hole in close ports to Internet (the major use of a firewall).

Well, a little bit more as it is a ‘rule’ based application and not an ‘application’ based like ZA. But I don’t think you can’t learn with all the help of avast users here…