I had a Mac SE with an ethernet card in 2001, around when Red Worm was loose. We put an HTTPd server on it, and watched as each RedWorm attempt came in. This ancient super slow machine not only stayed completely safe despite being on Mac OS 7.5 or something around there, while Windows machines of current vintage were being taken apart around the world. Added bonus, the slow speed of the SE meant it took about 10 times longer for each Red Worm attempt to give up, so we at least monopolized some tiny portion of those infected systems for a bit, keeping them from infesting others for a few more seconds...