Intrusion detection software (IDS) first made a serious impression on the European security market in the late 1990s. As with vulnerability scanning products, how good it was depended on where it got its database from and how often it was updated. IDS then languished for a few years with little variation. Improvements in alerting, refinements in detecting false positives and more enterprise scalability were the notable developments.Then industry whispers started to question what benefit could be derived from knowing you had been attacked. It was better than having no system at all, but surely advanced notification was better? From this realisation, intrusion prevention software (IPS) was born.
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