Chapter 9
Intrusion Detection Systems: Theory
Anecdote
Intrusion detection systems (IDSes) and packet sniffers do not replace your brain; you need to understand what they are telling you.
One day the Fat Bloke found himself dragged in to consult on a project for a huge bank buying a bit of another huge bank. The whiff of disaster was everywhere. The Bank of England (BoE) was demanding regular reports, and their top man gave my Big Six consultancy a call. Our best suits were mobilized; my job was to monitor how the team from a consultancy starting with A (commonly ...
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