Building Internet Firewalls

The Story

Everyone's jumping on the Internet bandwagon today, but with the explosive growth of the Internet has come a corresponding explosion in attacks on connected computer systems. These range from familiar attacks (e.g., cracking passwords and exploiting security holes in operating systems) to newer and more technically sophisticated ones (e.g., forging IP source addresses, packet sniffing, and hijacking terminal or login sessions). How can you protect your site from these threats?