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May 2009

Do you need an IDS or IPS, or both?

While threat management continues to be a top priority, it is more important than ever for cash-strapped security professionals to fully understand the functionality of intrusion defense tools in order to make good purchasing decisions. Intrusion defense systems (IDS) and intrusion prevention systems (IPS) are a particularly confusing area because the products are so similar, the vendors are all the same, and even the acronyms are hard to tell apart. We'll explain the capabilities of each and how to decide whether you need one or both technologies. Differentiating IDS and IPS An IPS is not the same as an IDS. However, the technology that you use to detect security problems in an IDS is very similar to the technology that you use to prevent security problems in an IPS. It's important to start out with the understanding that IDS and IPS are very, very different tools. Even though they have a common base, they fit into the network in different places, have different functions, and solve different problems. An IPS is best compared ...

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