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Linux Firewalls by Michael Rash

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DShield Reporting

The DShield distributed intrusion detection system (http://www.dshield.org) is an important instrument for the collection and reporting of security event data. It serves as a centralized depot for data provided by various software from both the open source and commercial worlds, including intrusion detection systems, routers, and firewalls.

Many such products can submit security alerts to DShield either via email or through a web interface. A complete listing of client programs that can submit event data to DShield can be found at http://www.dshield.org/howto.php.

The DShield database is designed as a global resource; anyone can use it to learn which IP address is attacking the greatest number of arbitrary targets, the ports and ...

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