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Cisco NX OS Switch L2S Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-NET-000362-L2S-000026

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco switch must have IP Source Guard enabled on all user-facing or untrusted access switch ports.

    &lt;VulnDiscussion&gt;IP Source Guard provides source IP address filtering on a Layer 2 port to prevent a malicious host from impersonating a legit...
    Rule Medium Severity
    Show

  • SRG-NET-000362-L2S-000027

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have Dynamic Address Resolution Protocol (ARP) Inspection (DAI) enabled on all user VLANs.

    &lt;VulnDiscussion&gt;DAI intercepts Address Resolution Protocol (ARP) requests and verifies that each of these packets has a valid IP-to-MAC addre...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000001

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco switch must have Storm Control configured on all host-facing switchports.

    &lt;VulnDiscussion&gt;A traffic storm occurs when packets flood a LAN, creating excessive traffic and degrading network performance. Traffic storm ...
    Rule Low Severity
    Show

  • SRG-NET-000512-L2S-000002

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have IGMP or MLD Snooping configured on all VLANs.

    &lt;VulnDiscussion&gt;IGMP and MLD snooping provides a way to constrain multicast traffic at Layer 2. By monitoring the IGMP or MLD membership repo...
    Rule Low Severity
    Show

  • SRG-NET-000512-L2S-000004

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must enable Unidirectional Link Detection (UDLD) to protect against one-way connections.

    &lt;VulnDiscussion&gt;In topologies where fiber optic interconnections are used, physical misconnections can occur that allow a link to appear to b...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000007

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have all disabled switch ports assigned to an unused VLAN.

    &lt;VulnDiscussion&gt;It is possible that a disabled port that is assigned to a user or management VLAN becomes enabled by accident or by an attack...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000008

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must not have the default VLAN assigned to any host-facing switch ports.

    &lt;VulnDiscussion&gt;In a VLAN-based network, switches use the default VLAN (i.e., VLAN 1) for in-band management and to communicate with other ne...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000009

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have the default VLAN pruned from all trunk ports that do not require it.

    &lt;VulnDiscussion&gt;The default VLAN (i.e., VLAN 1) is a special VLAN used for control plane traffic such as Spanning-Tree Protocol (STP), Dynami...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000010

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must not use the default VLAN for management traffic.

    &lt;VulnDiscussion&gt;Switches use the default VLAN (i.e., VLAN 1) for in-band management and to communicate with directly connected switches using...
    Rule Medium Severity
    Show

  • SRG-NET-000512-L2S-000011

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must have all user-facing or untrusted ports configured as access switch ports.

    &lt;VulnDiscussion&gt;Double encapsulation can be initiated by an attacker who has access to a switch port belonging to the native VLAN of the trun...
    Rule Medium Severity
    Show

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