The Cisco IOS XE router must enforce the limit of three consecutive invalid logon attempts by a user during a 15-minute time period.

From Cisco IOS XE Release 3 NDM Security Technical Implementation Guide

Associated with: CCI-000044

SV-88647r2_rule The Cisco IOS XE router must enforce the limit of three consecutive invalid logon attempts by a user during a 15-minute time period.

Vulnerability discussion

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

Check content

Verify that the Cisco IOS XE router limits the number of consecutive invalid logon attempts to "3" within "15" minutes. The configuration should look similar to the example below: ip ssh authentication-retries 3 login block-for 600 attempts 3 within 900 If the number of consecutive logon attempts is not set to "3" within "15" minutes, this is a finding.

Fix text

Configure SSH using: ip ssh authentication-retries 3 login block-for 600 attempts 3 within 900

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.