Unlike other challenges released by Overthewire, Natas focuses exclusively on exploiting web security bugs in servers, according to its creator, Steven Van Acker, a computer science graduate student at Katholieke Universiteit Leuven in Belgium.

FORBES: Hurricane-Bound Hacker? Here's A Rainy Day Web-Hacking War Game

But with games like Natas, named for a virus that spread via floppy disk in 1992, Van Acker says he hopes to fill a niche for true beginners learning the basics of web attacks and web security.

FORBES: Hurricane-Bound Hacker? Here's A Rainy Day Web-Hacking War Game

Check out Natas at Overthewire.org.

FORBES: Hurricane-Bound Hacker? Here's A Rainy Day Web-Hacking War Game