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Building Bastion Routers Using Cisco IOS
Cisco Security papers and strategies
TCP SYN DoS Attack prevention on Cisco - There is a potential denial of service attack at internet service providers (ISPs) that targets network devices.
TCP SYN attack: A sender transmits a volume of connections that cannot be completed. This causes the connection queues to fill up, thereby denying service to legitimate TCP users.This paper contains a technical description of how the potential TCP SYN attack occurs and suggested methods for using Cisco IOS software to defend against it.
Advisories and Patches.
Technical Support and Updates.
Disclaimers and copyright information
Last Update March 11, 2001