I just stumbled across an interesting web page by Marcus J. Ranum that attacks the myth that properly-administered computer “monocultures” are more vulnerable to computer attacks that a diverse population of computers, all running different operating systems at different patch levels.

Can you guess where I stand on this issue?

Ranum is best known as one of the early Internet firewall pioneers. He created the first commercial firewall and the first network forensics company. He’s currently pushing his book, The Myth of Homeland Security. I haven’t read it, but you can guess the political position that Marcus takes.