Online Armor Personal Firewall was a firewall originally developed by Australian company ( ), until the program was sold to Emsi Software GmbH. The program provides protection on a Microsoft Windows operating system from both inbound and outbound attacks. There are three editions of this product:Online Armor Free is freeware but is licensed for personal use only and has a limited featureset. Online Armor Premium is a more comprehensive commercial firewall that includes anti-phishing and anti-spam capabilities.