Cisco IOS Router RTR Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The Cisco router must be configured to produce audit records containing information to establish the source of the events.
Without establishing the source of the event, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order to compile an accurate risk assessmen...Rule Medium Severity -
SRG-NET-000019-RTR-000001
Group -
SRG-NET-000202-RTR-000001
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The Cisco perimeter router must be configured to deny network traffic by default and allow network traffic by exception.
A deny-all, permit-by-exception network communications traffic policy ensures that only connections that are essential and approved are allowed. This requirement applies to both inbound and outbou...Rule High Severity -
SRG-NET-000019-RTR-000002
Group -
SRG-NET-000364-RTR-000109
Group -
SRG-NET-000364-RTR-000110
Group -
The Cisco perimeter router must be configured to block inbound packets with source Bogon IP address prefixes.
Packets with Bogon IP source addresses should never be allowed to traverse the IP core. Bogon IP networks are RFC1918 addresses or address blocks that have never been assigned by the IANA or have b...Rule Medium Severity -
SRG-NET-000019-RTR-000008
Group -
SRG-NET-000019-RTR-000009
Group -
The Cisco perimeter router must be configured to not be a Border Gateway Protocol (BGP) peer to an approved gateway service provider.
ISPs use BGP to share route information with other autonomous systems (i.e., other ISPs and corporate networks). If the perimeter router was configured to BGP peer with an ISP, NIPRNet routes could...Rule High Severity -
SRG-NET-000019-RTR-000010
Group -
The Cisco perimeter router must be configured to not redistribute static routes to an approved gateway service provider into BGP, an IGP peering with the NIPRNet, or other autonomous systems.
If the static routes to the approved gateway are being redistributed into an Exterior Gateway Protocol or Interior Gateway Protocol to a NIPRNet gateway, this could make traffic on NIPRNet flow to ...Rule Low Severity -
SRG-NET-000205-RTR-000003
Group -
SRG-NET-000205-RTR-000004
Group -
The Cisco perimeter router must be configured to filter ingress traffic at the external interface on an inbound direction.
Access lists are used to separate data traffic into that which it will route (permitted packets) and that which it will not route (denied packets). Secure configuration of routers makes use of acce...Rule Medium Severity -
SRG-NET-000205-RTR-000005
Group -
SRG-NET-000364-RTR-000111
Group -
The Cisco perimeter router must be configured to have Link Layer Discovery Protocol (LLDP) disabled on all external interfaces.
LLDP is a neighbor discovery protocol used to advertise device capabilities, configuration information, and device identity. LLDP is media- and protocol-independent as it runs over layer 2; therefo...Rule Low Severity -
SRG-NET-000364-RTR-000111
Group
Node 2
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