Cisco IOS XE Switch RTR Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-NET-000205-RTR-000004
<GroupDescription></GroupDescription>Group -
The Cisco perimeter switch must be configured to filter ingress traffic at the external 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-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 perimeter switch must be configured to have Proxy ARP disabled on all external interfaces.
<VulnDiscussion>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 -
SRG-NET-000364-RTR-000113
<GroupDescription></GroupDescription>Group -
The Cisco perimeter switch must be configured to block all outbound management traffic.
<VulnDiscussion>For in-band management, the management network must have its own subnet in order to enforce control and access boundaries pro...Rule Medium Severity -
SRG-NET-000205-RTR-000012
<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 enable the Generalized TTL Security Mechanism (GTSM).
<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
Node 2
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