SoftPerfect Personal Firewall (ver 1.4.1) Abandoned Freeware The SoftPerfect Personal Firewall offers customizable security using user-defined rules for bidirectional packet filtering. It works at a low level, which allows you to create rules based on non-IP protocols such as ARP. The firewall supports multiple network adapter configurations. This allows you to apply a rule, for example, for just a modem connection, or you could apply separate rules for each system interface. With a flexible filtering system, trusted MAC address checking feature, and separate network adapter configuration, you can even use it on a router or a server. WARNING: The SoftPerfect Personal Firewall is not designed for novices, and requires some networking knowledge for a correct configuration.