Cisco IOS Switch L2S Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-NET-000148-L2S-000015
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SRG-NET-000168-L2S-000019
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SRG-NET-000193-L2S-000020
Group -
The Cisco switch must manage excess bandwidth to limit the effects of packet-flooding types of denial-of-service (DoS) attacks.
Denial of service is a condition when a resource is not available for legitimate users. Packet-flooding distributed DoS (DDoS) attacks are referred to as volumetric attacks and have the objective o...Rule Medium Severity -
SRG-NET-000362-L2S-000021
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SRG-NET-000362-L2S-000022
Group -
SRG-NET-000362-L2S-000023
Group -
The Cisco switch must have Spanning Tree Protocol (STP) Loop Guard enabled.
The STP loop guard feature provides additional protection against STP loops. An STP loop is created when an STP blocking port in a redundant topology erroneously transitions to the forwarding state...Rule Medium Severity -
SRG-NET-000362-L2S-000024
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The Cisco switch must have Unknown Unicast Flood Blocking (UUFB) enabled.
Access layer switches use the Content Addressable Memory (CAM) table to direct traffic to specific ports based on the VLAN number and the destination MAC address of the frame. When a router has an ...Rule Medium Severity -
SRG-NET-000362-L2S-000025
Group -
SRG-NET-000362-L2S-000026
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The Cisco switch must have IP Source Guard enabled on all user-facing or untrusted access switch ports.
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 use...Rule Medium Severity -
SRG-NET-000362-L2S-000027
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The Cisco switch must have Dynamic Address Resolution Protocol (ARP) Inspection (DAI) enabled on all user VLANs.
DAI intercepts ARP requests and verifies that each of these packets has a valid IP-to-MAC address binding before updating the local ARP cache and before forwarding the packet to the appropriate des...Rule Medium Severity -
SRG-NET-000512-L2S-000001
Group -
The Cisco switch must have Storm Control configured on all host-facing switchports.
A traffic storm occurs when packets flood a LAN, creating excessive traffic and degrading network performance. Traffic storm control prevents network disruption by suppressing ingress traffic when ...Rule Low Severity -
SRG-NET-000512-L2S-000002
Group -
SRG-NET-000512-L2S-000003
Group -
SRG-NET-000512-L2S-000004
Group
Node 2
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