STIGQter: STIG Summary: Cisco IOS XE Switch NDM Security Technical Implementation Guide Version: 3 Release: 6 Benchmark Date: 01 Apr 2026:

The Cisco switch must be configured to authenticate Network Time Protocol (NTP) sources using authentication that is cryptographically based.

DISA Rule

SV-220554r1107160_rule

Vulnerability Number

V-220554

Group Title

SRG-APP-000395-NDM-000347

Rule Version

CISC-ND-001150

Severity

CAT II

CCI(s)

• CCI-001967 - Authenticate organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based.

Weight

10

Fix Recommendation

Configure the Cisco switch to authenticate NTP sources using authentication that is cryptographically based as shown in the example below:

SW2(config)#ntp authenticate
SW2(config)#ntp authentication-key 1 hmac-sha2-256 xxxxxx
SW2(config)#ntp trusted-key 1
SW2(config)#ntp server x.x.x.x key 1
SW2(config)#ntp server y.y.y.y key 1

Check Contents

Review the Cisco switch configuration to verify that it is compliant with this requirement as shown in the configuration example below:

ntp authentication-key 1 hmac-sha2-256 xxxxxx
ntp authenticate
ntp trusted-key 1
ntp server x.x.x.x key 1
ntp server y.y.y.y key 1

If the Cisco switch is not configured to authenticate NTP sources using authentication that is cryptographically based, this is a finding.

Vulnerability Number

V-220554

Documentable

False

Rule Version

CISC-ND-001150

Severity Override Guidance

Review the Cisco switch configuration to verify that it is compliant with this requirement as shown in the configuration example below:

ntp authentication-key 1 hmac-sha2-256 xxxxxx
ntp authenticate
ntp trusted-key 1
ntp server x.x.x.x key 1
ntp server y.y.y.y key 1

If the Cisco switch is not configured to authenticate NTP sources using authentication that is cryptographically based, this is a finding.

Check Content Reference

M

Target Key

4067