Fli4l v3.4.0
Fli4l “the on(e)-disk-router”, is a single floppy Linux-based ISDN, DSL and Ethernet-Router. You can build it from an old 486 based pc with 16 megabyte memory, which is more than adequate for this purpose. Stable version 2.0.8 was released April 27, 2003, adding the ability to install and boot from a USB memory stick or DiscOnChip. Development version 3.1.1 was released September 9, 2006. Stable version 3.0.2 was released December 25, 2006.
Download link to the distribution ISO