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Configuring IPCop Firewalls by James Eaton-Lee, Barrie Dempster

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Chapter 6. Intrusion Detection with IPCop

Now that we have a working firewall with most of the basic features set up, we are feeling pretty secure. Surely no malicious intruder could get past these defenses on our network. What if they did though? How would we know? What would we do?

These are questions that an Intrusion Detection System (IDS) tries to answer; it detects when things don't go entirely to plan in regards to network security and logs any suspicious activity that it recognizes, so that we can effectively deal with a security incident.

Introduction to IDS

There are a variety of Intrusion Detection Systems in the market ranging from the enterprise-level managed-network monitoring solution to a simple on-the-host logging system. There ...

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