ZoneAlarm Pro automatically blocks known and unknown Internet threats for home users, small-business owners, and corporate employees working remotely. The program monitors outgoing application traffic, as well as incoming traffic to protect you from any local applications attempting to use your Internet connection to communicate with the outside world. You have the option to grant or deny access on a per-application basis, customizing the protection of your system. ZoneAlarm Pro also offers password protection, automatic mobile-PC protection, and e-mail attachment protection for 47 file types. ZoneAlarm Pro features online privacy protection with pop-up stopping, ad blocking, and cookie-control features. The latest update adds Complete Mailsafe for blocking suspect e-mail, Cache Cleaner for eliminating traces of your Internet activity, expert firewall controls, and Hacker ID for tracking and mapping hacker attacks.

New in ZoneAlarm Pro 5.0 are automatic program configurations.