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Layer 2 Switch Security Requirements Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • The layer 2 switch must implement Rapid STP where VLANs span multiple switches with redundant links.

    <VulnDiscussion>Spanning Tree Protocol (STP) is implemented on bridges and switches to prevent layer 2 loops when a broadcast domain spans mu...
    Rule Medium Severity
  • SRG-NET-000512

    <GroupDescription></GroupDescription>
    Group
  • The layer 2 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
  • SRG-NET-000512

    <GroupDescription></GroupDescription>
    Group
  • The layer 2 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
  • The layer 2 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
  • SRG-NET-000512

    <GroupDescription></GroupDescription>
    Group
  • The layer 2 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
  • SRG-NET-000512

    <GroupDescription></GroupDescription>
    Group
  • The layer 2 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

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