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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 reject outbound route advertisements for any prefixes that do not belong to any customers or the local autonomous system (AS).

    <VulnDiscussion>Advertisement of routes by an autonomous system for networks that do not belong to any of its customers pulls traffic away fr...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000006

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco BGP switch must be configured to reject outbound route advertisements for any prefixes belonging to the IP core.

    &lt;VulnDiscussion&gt;Outbound route advertisements belonging to the core can result in traffic either looping or being black holed, or at a minimu...
    Rule Medium Severity
    Show

  • SRG-NET-000018-RTR-000006

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco BGP switch must be configured to reject route advertisements from BGP peers that do not list their autonomous system (AS) number as the first AS in the AS_PATH attribute.

    &lt;VulnDiscussion&gt;Verifying the path a route has traversed will ensure the IP core is not used as a transit network for unauthorized or possibl...
    Rule Low Severity
    Show

  • SRG-NET-000018-RTR-000010

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco BGP switch must be configured to reject route advertisements from CE switches with an originating AS in the AS_PATH attribute that does not belong to that customer.

    &lt;VulnDiscussion&gt;Verifying the path a route has traversed will ensure that the local AS is not used as a transit network for unauthorized traf...
    Rule Low Severity
    Show

  • SRG-NET-000362-RTR-000117

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco PE switch must be configured to have each Virtual Routing and Forwarding (VRF) instance with the appropriate Route Target (RT).

    &lt;VulnDiscussion&gt;The primary security model for an MPLS L3VPN as well as a VRF-lite infrastructure is traffic separation. Each interface can o...
    Rule High Severity
    Show

  • SRG-NET-000512-RTR-000007

    <GroupDescription></GroupDescription>
    Group
    Show

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

    &lt;VulnDiscussion&gt;When Proxy ARP is enabled on a switch, it allows that switch to extend the network (at Layer 2) across multiple interfaces (L...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000113

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to implement message authentication for all control plane protocols.

    &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-000230-RTR-000003

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter switch must be configured to block all outbound management traffic.

    &lt;VulnDiscussion&gt;For in-band management, the management network must have its own subnet in order to enforce control and access boundaries pro...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000012

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to protect against or limit the effects of denial-of-service (DoS) attacks by employing control plane protection.

    &lt;VulnDiscussion&gt;The Route Processor (RP) is critical to all network operations because it is the component used to build all forwarding paths...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco switch must be configured to restrict traffic destined to itself.

    &lt;VulnDiscussion&gt;The route processor handles traffic destined to the switch—the key component used to build forwarding paths and is instrument...
    Rule High Severity
    Show

  • SRG-NET-000205-RTR-000002

    <GroupDescription></GroupDescription>
    Group
    Show

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