FLI4L is a mini-linux distribution designed for routing (DSL,ISDN,WLAN,Bluetooth etc.). It fits on one 1.44 mb floppy and can be run on old 386 computers with two network cards. It's highly configurable through selectable packets and configuration files, allowing advanced routing features such as QoS, port-forwarding, DHCP, DNS, iptables-based firewalling , VPN and more.