Enable TCP-SYN Cookie Protection

TCP-SYN cookie protection mitigates the impact of SYN flood attacks on the system. When an attacker launches a SYN flood attack, the half-open connection queue in the kernel is quickly exhausted to block valid connections. If SYN cookie is enabled, the system can still accept valid connections ev...

CVE-2021-34697: Improper Initialization

A vulnerability in the Protection Against Distributed Denial of Service Attacks feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct denial of service DoS attacks to or through the affected device. This vulnerability is due to incorrect programming of the...

PT-2021-4742

Name of the Vulnerable Software and Affected Versions Cisco IOS XE Software affected versions not specified Description A vulnerability in the Protection Against Distributed Denial of Service Attacks feature could allow an unauthenticated, remote attacker to conduct denial of service DoS attacks ...