Take Control of Security for Mac Users, Chapter 6: Improve Your Network Security
No Mac is an island, and it’s important to protect the network traffic flowing to and from your Mac. Luckily, a few simple precautions will prevent automated bots from sniffing your traffic for email addresses to spam, passwords to exploit, and credit card numbers to resell, among much else.
It is wonderful to have all the necessary information on a given subject in one place. This applies to The operating system as well as security. Thank you--you've made it easier.