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Cisco NX OS Switch RTR Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • The Cisco switch must be configured to drop all fragmented Internet Control Message Protocol (ICMP) packets destined to itself.

    <VulnDiscussion>Fragmented ICMP packets can be generated by hackers for DoS attacks such as Ping O' Death and Teardrop. It is imperative that...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000111

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to have Gratuitous ARP disabled on all external interfaces.

    &lt;VulnDiscussion&gt;A gratuitous ARP is an ARP broadcast in which the source and destination MAC addresses are the same. It is used to inform the...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000112

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to enforce approved authorizations for controlling the flow of information between interconnected networks in accordance with applicable policy.

    &lt;VulnDiscussion&gt;Information flow control regulates authorized information to travel within a network and between interconnected networks. Con...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000109

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco BGP switch must be configured to reject inbound route advertisements from a customer edge (CE) switch for prefixes that are not allocated to that customer.

    &lt;VulnDiscussion&gt;As a best practice, a service provider should only accept customer prefixes that have been assigned to that customer and any ...
    Rule Medium Severity
    Show

  • SRG-NET-000018-RTR-000005

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco PE switch must be configured to implement Internet Group Management Protocol (IGMP) or Multicast Listener Discovery (MLD) snooping for each Virtual Private LAN Services (VPLS) bridge domain.

    &lt;VulnDiscussion&gt;IGMP snooping provides a way to constrain multicast traffic at Layer 2. By monitoring the IGMP membership reports sent by hos...
    Rule Low Severity
    Show

  • SRG-NET-000192-RTR-000002

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must not be configured to have any feature enabled that calls home to the vendor.

    &lt;VulnDiscussion&gt;Call home services will routinely send data such as configuration and diagnostic information to the vendor for routine or eme...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000110

    <GroupDescription></GroupDescription>
    Group
    Show

  • SRG-NET-000230-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to use keys with a duration not exceeding 180 days for authenticating routing protocol messages.

    &lt;VulnDiscussion&gt;If the keys used for routing protocol authentication are guessed, the malicious user could create havoc within the network by...
    Rule Medium Severity
    Show

  • SRG-NET-000168-RTR-000077

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to use encryption for routing protocol authentication.

    &lt;VulnDiscussion&gt;A rogue switch could send a fictitious routing update to convince a site's perimeter switch to send traffic to an incorrect o...
    Rule Medium Severity
    Show

  • SRG-NET-000168-RTR-000078

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to authenticate all routing protocol messages using NIST-validated FIPS 198-1 message authentication code algorithm.

    &lt;VulnDiscussion&gt;A rogue switch could send a fictitious routing update to convince a site's perimeter switch to send traffic to an incorrect o...
    Rule Medium Severity
    Show

  • SRG-NET-000019-RTR-000007

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to have all inactive layer 3 interfaces disabled.

    &lt;VulnDiscussion&gt;An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface. U...
    Rule Low Severity
    Show

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