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XCCDF
Cisco IOS XE Switch RTR Security Technical Implementation Guide
SRG-NET-000362-RTR-000124
The Cisco BGP switch must be configured to enable the Generalized TTL Security Mechanism (GTSM).
The Cisco BGP switch must be configured to enable the Generalized TTL Security Mechanism (GTSM).
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The Cisco BGP switch must be configured to enable the Generalized TTL Security Mechanism (GTSM).
Low Severity
<VulnDiscussion>As described in RFC 3682, GTSM is designed to protect a switch's IP-based control plane from DoS attacks. Many attacks focused on CPU load and line-card overload can be prevented by implementing GTSM on all Exterior Border Gateway Protocol-speaking switches. GTSM is based on the fact that the vast majority of control plane peering is established between adjacent switches; that is, the Exterior Border Gateway Protocol peers are either between connecting interfaces or between loopback interfaces. Since TTL spoofing is considered nearly impossible, a mechanism based on an expected TTL value provides a simple and reasonably robust defense from infrastructure attacks based on forged control plane traffic.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>