|Stable release||10.4.5 / 2007|
|Operating system||Mac OS X|
Netbarrier X4 was a version of the Intego Netbarrier line of its Mac-compatible firewall. It featured a cookie cleaner, a browser history cleaner, internet traffic statistic, and an Internet bandwidth meter. It also contained cookie filters and information hiding. The firewall is customizable, with already configured options: No Restrictions, No Network, Client (Local Server), Server Only, Client Only, and Customized. The "Customized" option is where the user can configure the firewall to his or her extent.
NetBarrier's features have been integrated into VirusBarrier X6, and it is no longer sold as a standalone product.