Snort: Open Source Network Intrusion Prevention

“A few years ago, when we spoke of network intrusion security
systems, we spoke of IDS (Intrusion Detection System) appliances.
Recently, as the emphasis has shifted from detection to prevention,
IDS has become IPS (Intrusion Prevention Systems).

“The compelling force behind this change is the same one that
has thrust an open source software company named SourceFire to the
front of the Network Intrusion Prevention System Appliances market
sector; that is, a fast changing threat environment. In an article
for Military Information Technology, Deputy Undersecretary of
Defense Sue Payton writes that ‘if the boots-on-the-ground
community is urged to ‘train as you fight,’ the technology
community that supports warfighters must similarly be urged to code
as we fight,’ which is her way of saying that rapidly changing
threats requires the agility of rapidly modifiable and accessible
source code…”


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