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XCCDF
SEL-2740S L2S Security Technical Implementation Guide
SRG-NET-000362-L2S-000026
SEL-2740S flow rules must include the host IP addresses that are bound to designated SEL-2740S ports for ensuring trusted host access.
SEL-2740S flow rules must include the host IP addresses that are bound to designated SEL-2740S ports for ensuring trusted host access.
An XCCDF Rule
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SEL-2740S flow rules must include the host IP addresses that are bound to designated SEL-2740S ports for ensuring trusted host access.
Medium Severity
<VulnDiscussion>IP Source Guard provides source IP address filtering on a Layer 2 port to prevent a malicious host from impersonating a legitimate host by assuming the legitimate host's IP address. The feature uses dynamic DHCP snooping and static IP source binding to match IP addresses to hosts on untrusted Layer 2 access ports. Initially, all IP traffic on the protected port is blocked except for DHCP packets. After a client receives an IP address from the DHCP server, or after static IP source binding is configured by the administrator, all traffic with that IP source address is permitted from that client. Traffic from other hosts is denied. This filtering limits a host's ability to attack the network by claiming a neighbor host's IP address.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>