A rule based packet and application filtering firewall. Nice interface, easy configuration and high efficiency with low resources consumption. THIS PROJECT IS NO LONGER UNDER DEVELOPMENT.
It is not light on system resources. Testing it on my laptop with a 1.7 GHz P4 CPU I found that it uses 18 - 32% of CPU and up to 58 Mb of RAM. Otherwise it provides good program control for outbound connections. A pop up appears for every process that attempts to access the internet and the users response is incorporated into program rules. As it has not be updated since 2007 I wonder if it can do IPV6 packet filtering.
dcfirewall is small and works nicely