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II - Mission Support Sensitive

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000362

    <GroupDescription></GroupDescription>
    Group
  • The layer 2 switch must have STP Loop Guard enabled on all non-designated STP switch ports.

    &lt;VulnDiscussion&gt;The Spanning Tree Protocol (STP) loop guard feature provides additional protection against STP loops. An STP loop is created ...
    Rule Medium Severity
  • SRG-NET-000362

    <GroupDescription></GroupDescription>
    Group
  • The layer 2 switch must have Unknown Unicast Flood Blocking (UUFB) enabled.

    &lt;VulnDiscussion&gt;Access layer switches use the Content Addressable Memory (CAM) table to direct traffic to specific ports based on the VLAN nu...
    Rule Medium Severity
  • SRG-NET-000362

    <GroupDescription></GroupDescription>
    Group
  • The layer 2 switch must have DHCP snooping for all user VLANs to validate DHCP messages from untrusted sources.

    &lt;VulnDiscussion&gt;In an enterprise network, devices under administrative control are trusted sources. These devices include the switches, route...
    Rule Medium Severity
  • SRG-NET-000362

    <GroupDescription></GroupDescription>
    Group
  • The layer 2 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
  • SRG-NET-000362

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

    <GroupDescription></GroupDescription>
    Group
  • The layer 2 switch must have Storm Control configured on all host-facing switch ports.

    &lt;VulnDiscussion&gt;A traffic storm occurs when packets flood a LAN, creating excessive traffic and degrading network performance. Traffic storm ...
    Rule Low Severity
  • SRG-NET-000512

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

    <GroupDescription></GroupDescription>
    Group
  • The layer 2 switch must implement Rapid STP where VLANs span multiple switches with redundant links.

    &lt;VulnDiscussion&gt;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 have all trunk links enabled statically.

    &lt;VulnDiscussion&gt;When trunk negotiation is enabled via Dynamic Trunk Protocol (DTP), considerable time can be spent negotiating trunk settings...
    Rule Medium Severity

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