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Bro is a system for detecting Network Intruders in real-time by the guys
that brought you tcpdump, libpcap, and flex.
Bro is a stand-alone system for detecting network intruders in real-time
by passively monitoring a network link over which the intruder's traffic
transits. Bro is divided into an "event engine" that reduces a
kernel-filtered network traffic stream into a series of higher-level
events, and a "policy script interpreter" that interprets event handlers
written in a specialized language used to express a site's security policy.
Event handlers can update state information, synthesize new events, record
information to disk, and generate real-time notifications via `syslog'.
Bro is documented in the USENIX 1998 Security Conference proceedings.
-- David
obrien@cs.ucdavis.edu
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