STIGQter: STIG Summary: Cisco NX-OS Switch RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Apr 2021:

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

DISA Rule

SV-221085r622190_rule

Vulnerability Number

V-221085

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:

SW1(config)# int e2/7
SW1(config-if)# no ip redirects

Check Contents

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

interface Ethernet2/7
no switchport
ip address x.22.4.2/30
no ip redirects

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

Vulnerability Number

V-221085

Documentable

False

Rule Version

CISC-RT-000190

Severity Override Guidance

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

interface Ethernet2/7
no switchport
ip address x.22.4.2/30
no ip redirects

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

Check Content Reference

M

Target Key

4075

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