Wow, it's still alive. I remember when, as a student, I ran the shared apartment's DSL Router with fli4l from a floppy disk in a Pentium 90 for a while. I think the Internet connection was 768kbit/s downlink and we considered it decently fast... 2003-ish.
wow, nostalgia hits hard. i started using this back in 2001. first as an isdn and later as dsl router. iirc with some pentium/ 4MB board.
Somewhat reminds of FloppyFW, which I used back in the day on a huge 486 to protect my home network. https://www.zelow.no/floppyfw/