"Today organizations, companies, countries, and ordinary
individuals have reflections or even a point of presence in another
medium, the Internet. In some cases this point of presence is more
important than many real world assessments.
"The Internet is built on TCP/IP, not the most secure of
protocols. It is never easy to know who is trying to endanger your
online presence or when. There's no single do-it-all piece of
software. If you don't know what you're doing, a whole suite of
firewalls, honeypots, and Intrusion Detection Systems (IDS) may not
"The quest for security is hot, and it's recently focused on
IDSes. An IDS is a virtual watchdog which watches the network and
specific hosts for suspicious behavior. Then, it barks or bites.
There are plenty of IDSes to choose from, both commercial and open
source. Snort, a network intrusion detection system (NIDS) released
under the GPL, is one popular example. Snort has reached maturity
in its 2.0 release..."
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