ethicalhacker.net —Quick and dirty tutorial on getting OSSEC, the open source IDS that's #2 on insecure.org, running on the Business Card ISO of Debian. Now go out there and start keeping an eye on your network.
Digg is a place for people to discover and share content from anywhere on the web. Digg surfaces the best stuff as submitted and voted on by the community. Take the Tour to learn more.