There are lots of threats out there, and some of them might even penetrate into your network. You'll want to know when that happens, so you'll want to have a good Network Intrusion Detection System (NIDS) in place. We'll look at Snort, which is probably the most famous one. I'll then show you a way to cheat so that you can have a Snort system up and running in no time at all.
We've already seen how to scan a machine for viruses and rootkits by installing scanning tools onto the machines that we want to scan. However, there are a lot more vulnerabilities for which we can scan, and I'll show you some cool tools that you can use for that.
The following topics are covered in this chapter:
- An introduction to Snort and Security Onion
- Scanning and hardening with Lynis
- Finding vulnerabilities with OpenVAS
- Web...
