DoS Protection

Cisco IOS Firewall provides protection from denial-of-service (DoS) attacks, such as SYN flood denial, port scans, and packet injection. Additional functionality has been added to the logging features introduced in Cisco IOS Software Release 12.3(7) to track the source IP of traffic flowing to a host that might be the target of a DoS attack. This features enables you to track the traffic across the entire network, determine the network entry point, and maintain logs simultaneously on each device that passes the traffic.

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