Cisco NX OS Switch RTR Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-NET-000205-RTR-000005
<GroupDescription></GroupDescription>Group -
The Cisco perimeter switch must be configured to filter egress traffic at the internal interface on an inbound direction.
<VulnDiscussion>Access lists are used to separate data traffic into that which it will route (permitted packets) and that which it will not r...Rule Medium Severity -
SRG-NET-000205-RTR-000015
<GroupDescription></GroupDescription>Group -
The Cisco perimeter switch must be configured to block all packets with any IP options.
<VulnDiscussion>Packets with IP options are not fast switched and henceforth must be punted to the switch processor. Hackers who initiate den...Rule Medium Severity -
SRG-NET-000364-RTR-000111
<GroupDescription></GroupDescription>Group -
The Cisco perimeter switch must be configured to have Link Layer Discovery Protocol (LLDP) disabled on all external interfaces.
<VulnDiscussion>LLDP is a neighbor discovery protocol used to advertise device capabilities, configuration information, and device identity. ...Rule Low Severity -
SRG-NET-000364-RTR-000111
<GroupDescription></GroupDescription>Group -
The Cisco perimeter switch must be configured to have Cisco Discovery Protocol (CDP) disabled on all external interfaces.
<VulnDiscussion>CDP is a Cisco proprietary neighbor discovery protocol used to advertise device capabilities, configuration information, and ...Rule Low Severity -
SRG-NET-000364-RTR-000112
<GroupDescription></GroupDescription>Group -
The Cisco switch must be configured to only permit management traffic that ingresses and egresses the out-of-band management (OOBM) interface.
<VulnDiscussion>The OOBM access switch will connect to the management interface of the managed network elements. The management interface can...Rule Medium Severity -
SRG-NET-000362-RTR-000124
<GroupDescription></GroupDescription>Group -
The Cisco BGP switch must be configured to check whether a single-hop eBGP peer is directly connected.
<VulnDiscussion>As described in RFC 3682, GTSM is designed to protect a switch's IP-based control plane from DoS attacks. Many attacks focuse...Rule Low Severity -
SRG-NET-000230-RTR-000002
<GroupDescription></GroupDescription>Group -
The Cisco BGP switch must be configured to use a unique key for each autonomous system (AS) that it peers with.
<VulnDiscussion>If the same keys are used between eBGP neighbors, the chance of a hacker compromising any of the BGP sessions increases. It i...Rule Medium Severity -
SRG-NET-000018-RTR-000002
<GroupDescription></GroupDescription>Group -
The Cisco BGP switch must be configured to reject inbound route advertisements for any Bogon prefixes.
<VulnDiscussion>Accepting route advertisements for Bogon prefixes can result in the local autonomous system (AS) becoming a transit for malic...Rule Medium Severity -
SRG-NET-000018-RTR-000003
<GroupDescription></GroupDescription>Group -
The Cisco BGP switch must be configured to reject inbound route advertisements for any prefixes belonging to the local autonomous system (AS).
<VulnDiscussion>Accepting route advertisements belonging to the local AS can result in traffic looping or being black-holed, or at a minimum,...Rule Medium Severity -
SRG-NET-000018-RTR-000004
<GroupDescription></GroupDescription>Group -
The Cisco PE switch providing Virtual Private LAN Services (VPLS) must be configured to have traffic storm control thresholds on CE-facing interfaces.
<VulnDiscussion>A traffic storm occurs when packets flood a VPLS bridge, creating excessive traffic and degrading network performance. Traffi...Rule Medium Severity
Node 2
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