| tags: code game
Here's a rather old (and probably outdated) look at how one could
simulate digital logic circuits with OpenTTD. Includes the fastest
four-bit ripple-carry adder ever: takes about two months (of in-game
time) for the carry information to propagate.
| tags: code sec
From the 2005s, an outdated nano-HOWTO on how to build a port knocking system to reduce the amount of SSH password guessing attempts, with simple iptables rules and no extra daemons.