Please,Please add a built in firewall for Macintosh and PC versions.
Please add a comprehensive firewall for BOTH the PC and the Macintosh versions. Where you can adjust multiple rules and look at patterns of connection tivity. I know this is a lot to ask for in a newly developed feature but it could have these settings which would be advanced. Then it would have simple that would make decisions for you. This really is necessary because if the virus can not get in the first place then it is half the battle.