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Cisco NX OS Switch RTR Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • The Cisco BGP switch must be configured to use the maximum prefixes feature to protect against route table flooding and prefix de-aggregation attacks.

    <VulnDiscussion>The effects of prefix de-aggregation can degrade switch performance due to the size of routing tables and also result in blac...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000118

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco BGP switch must be configured to limit the prefix size on any inbound route advertisement to /24, or the least significant prefixes issued to the customer.

    &lt;VulnDiscussion&gt;The effects of prefix de-aggregation can degrade switch performance due to the size of routing tables and also result in blac...
    Rule Low Severity
    Show

  • SRG-NET-000512-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco BGP switch must be configured to use its loopback address as the source address for iBGP peering sessions.

    &lt;VulnDiscussion&gt;Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability o...
    Rule Low Severity
    Show

  • SRG-NET-000512-RTR-000002

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco MPLS switch must be configured to use its loopback address as the source address for LDP peering sessions.

    &lt;VulnDiscussion&gt;Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability o...
    Rule Low Severity
    Show

  • SRG-NET-000512-RTR-000003

    <GroupDescription></GroupDescription>
    Group
    Show

  • SRG-NET-000362-RTR-000119

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to suppress Router Advertisements on all external IPv6-enabled interfaces.

    &lt;VulnDiscussion&gt;Many of the known attacks in stateless autoconfiguration are defined in RFC 3756 were present in IPv4 ARP attacks. To mitigat...
    Rule Medium Severity
    Show

  • The Cisco MPLS switch must be configured to synchronize Interior Gateway Protocol (IGP) and LDP to minimize packet loss when an IGP adjacency is established prior to LDP peers completing label exchange.

    &lt;VulnDiscussion&gt;Packet loss can occur when an IGP adjacency is established and the switch begins forwarding packets using the new adjacency b...
    Rule Low Severity
    Show

  • SRG-NET-000193-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The MPLS switch with RSVP-TE enabled must be configured with message pacing to adjust maximum burst and maximum number of RSVP messages to an output queue based on the link speed and input queue size of adjacent core switches.

    &lt;VulnDiscussion&gt;RSVP-TE can be used to perform constraint-based routing when building LSP tunnels within the network core that will support Q...
    Rule Low Severity
    Show

  • SRG-NET-000512-RTR-000004

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco MPLS switch must be configured to have TTL Propagation disabled.

    &lt;VulnDiscussion&gt;The head end of the label-switched path (LSP), the label edge switch (LER) will decrement the IP packet's time-to-live (TTL) ...
    Rule Medium Severity
    Show

  • SRG-NET-000512-RTR-000005

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco PE switch must be configured to have each Virtual Routing and Forwarding (VRF) instance bound to the appropriate physical or logical interfaces to maintain traffic separation between all MPLS L3VPNs.

    &lt;VulnDiscussion&gt;The primary security model for an MPLS L3VPN infrastructure is traffic separation. The service provider must guarantee the cu...
    Rule High Severity
    Show

  • SRG-NET-000512-RTR-000006

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco PE switch must be configured to have each VRF with the appropriate Route Distinguisher (RD).

    &lt;VulnDiscussion&gt;An RD provides uniqueness to the customer address spaces within the MPLS L3VPN infrastructure. The concept of the VPN-IPv4 an...
    Rule Medium Severity
    Show

  • SRG-NET-000343-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

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