STIGQter: STIG Summary: Cisco IOS XE Router RTR Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

The Cisco perimeter router must be configured to have Cisco Discovery Protocol (CDP) disabled on all external interfaces.

DISA Rule

SV-216675r531086_rule

Vulnerability Number

V-216675

Group Title

SRG-NET-000364-RTR-000111

Rule Version

CISC-RT-000370

Severity

CAT III

CCI(s)

CCI-002403 - The information system only allows incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

Weight

Fix Recommendation

This requirement is not applicable for the DODIN Backbone.

Disable CDP on all external interfaces via no cdp enable command or disable CDP globally via no cdp run command.

Check Contents

This requirement is not applicable for the DODIN Backbone.

Step 1: Verify if CDP is enabled globally as shown below:

cdp run

By default, CDP is not enabled globally or on any interface. If CDP is enabled globally, proceed to step 2.

Step 2: Verify CDP is not enabled on any external interface as shown in the example below:

interface GigabitEthernet2
ip address z.1.24.4 255.255.255.252
…
…
…
cdp enable

If CDP is enabled on any external interface, this is a finding.

The Cisco perimeter router must be configured to have Cisco Discovery Protocol (CDP) disabled on all external interfaces.

DISA Rule

Vulnerability Number

Group Title

Rule Version

Severity

CCI(s)

Weight

Fix Recommendation

Check Contents

Vulnerability Number

Documentable

Rule Version

Severity Override Guidance

Check Content Reference

Target Key

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