There are two reasons why you might want to conduct a penetration test. One, you want to know whether a certain vulnerability is present because you’re going to fix it if it is. And two, you need a big, scary report to persuade your boss to spend more money. If neither is true, I’m going to save you a lot of money by giving you this free penetration test: You’re vulnerable.
Now, go do something useful about it.
Though I don’t completely subscribe to the point of view expressed by both this essay and Ranum’s rebuttal (I believe their brevity is not doing justice to a complex subject), I liked this particular paragraph. I find it so true… and, why not, funny!
cat >/dev/null is 



aa
interesting