The Cisco router must be configured to enforce the limit of three consecutive invalid logon attempts, after which time it must lock out the user account from accessing the device for 15 minutes.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-215668	SRG-APP-000065-NDM-000214	CISC-ND-000150	SV-215668r960840_rule	2025-02-27	3

Description
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced.

ℹ️ Check
Review the Cisco router configuration to verify that it enforces the limit of three consecutive invalid logon attempts as shown in the example below. login block-for 900 attempts 3 within 120 Note: The configuration example above will block any login attempt for 15 minutes after three consecutive invalid logon attempts within a two-minute period. If the Cisco router is not configured to enforce the limit of three consecutive invalid logon attempts, this is a finding.

ℹ️ Check

Review the Cisco router configuration to verify that it enforces the limit of three consecutive invalid logon attempts as shown in the example below. login block-for 900 attempts 3 within 120 Note: The configuration example above will block any login attempt for 15 minutes after three consecutive invalid logon attempts within a two-minute period. If the Cisco router is not configured to enforce the limit of three consecutive invalid logon attempts, this is a finding.

✔️ Fix
Configure the Cisco router to enforce the limit of three consecutive invalid logon attempts as shown in the example below. R2(config)#login block-for 900 attempts 3 within 120