STIGQter: STIG Summary: Cisco IOS Router RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Oct 2020:

The Cisco router must be configured to have Internet Control Message Protocol (ICMP) redirect messages disabled on all external interfaces.

DISA Rule

SV-216567r531085_rule

Vulnerability Number

V-216567

Group Title

SRG-NET-000362-RTR-000115

Rule Version

CISC-RT-000190

Severity

CAT II

CCI(s)

• CCI-002385 - The information system protects against or limits the effects of organization-defined types of denial of service attacks by employing organization-defined security safeguards.

Weight

10

Fix Recommendation

Disable ICMP redirects on all external interfaces as shown in the example below.

R4(config)#int g0/1
R4(config-if)#no ip redirects

Check Contents

Review the router configuration to verify that the no ip redirects command has been configured on all external interfaces as shown in the example below.

interface GigabitEthernet0/1
ip address x.x.x.x 255.255.255.0
no ip redirects

If ICMP Redirect messages are enabled on any external interfaces, this is a finding.

Vulnerability Number

V-216567

Documentable

False

Rule Version

CISC-RT-000190

Severity Override Guidance

Review the router configuration to verify that the no ip redirects command has been configured on all external interfaces as shown in the example below.

interface GigabitEthernet0/1
ip address x.x.x.x 255.255.255.0
no ip redirects

If ICMP Redirect messages are enabled on any external interfaces, this is a finding.

Check Content Reference

M

Target Key

4027

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