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Cisco IOS XE Switch RTR Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-NET-000018-RTR-000002

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco BGP switch must be configured to reject inbound route advertisements for any Bogon prefixes.

    &lt;VulnDiscussion&gt;Accepting route advertisements for Bogon prefixes can result in the local autonomous system (AS) becoming a transit for malic...
    Rule Medium Severity
    Show

  • SRG-NET-000018-RTR-000003

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco BGP switch must be configured to reject inbound route advertisements for any prefixes belonging to the local autonomous system (AS).

    &lt;VulnDiscussion&gt;Accepting route advertisements belonging to the local AS can result in traffic looping or being black-holed, or at a minimum,...
    Rule Medium Severity
    Show

  • SRG-NET-000018-RTR-000004

    <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 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).

    &lt;VulnDiscussion&gt;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 BGP switch must be configured to use the maximum prefixes feature to protect against route table flooding and prefix de-aggregation attacks.

    &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 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

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