User Guide for Cisco Secure Access Control Server - Stewing Home

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Configuration-Specific User Group Settings 5-16 User Guide for Cisco Secure Access Control Server 4.2 Chapter 5 User Group Management Protected Extensible Authentication Protocol (PEAP) and Extensible Authentication Protocol-Flexible Authentication via Secure Tunnelling (EAP-FAST) Windows Password Aging—Users must be in the Windows user database and be using a Microsoft client that supports EAP, such as Windows XP. For information on the requirements and configuration of this password-aging mechanism, see Enabling Password Aging for Users in Windows Databases, page 5-19. RADIUS-based Windows Password Aging—Users must be in the Windows user database and be using a RADIUS client/supplicant that supports changing passwords by using Microsoft-Challenge Authentication Handshake Protocol (MS-CHAP). For information on the requirements and configuration of this password aging mechanism, see Enabling Password Aging for Users in Windows Databases, page 5-19. Password Aging for Device-hosted Sessions—Users must be in the ACS internal database, the AAA client must be running TACACS+, and the connection must use Telnet. You can control the ability of users to change passwords during a device-hosted Telnet session. You can also control whether ACS propagates passwords changed by using this feature. For more information, see Local Password Management, page 7-4. Password Aging for Transit Sessions—Users must be in the ACS internal database. Users must use a PPP dialup client. Further, the end-user client must have Cisco Authentication Agent (CAA) installed. Tip The CAA software is available at http://www.cisco.com. Also, to run password aging for transit sessions, the AAA client can be running RADIUS or TACACS+; moreover, the AAA client must be using Cisco IOS Release 11.2.7 or later and be configured to send a watchdog accounting packet (aaa accounting new-info update) with the IP address of the calling station. (Watchdog packets are interim packets sent periodically during a session. They provide an approximate session length in the event that no stop packet is received to mark the end of the session.) You can control whether ACS propagates passwords changed by using this feature. For more information, see Local Password Management, page 7-4. ACS supports password aging by using the RADIUS protocol under MS CHAP versions 1 and 2. ACS does not support password aging over Telnet connections that use the RADIUS protocol. Caution If a user with a RADIUS connection tries to make a Telnet connection to the AAA client during or after the password aging warning or grace period, the Change Password option does not appear, and the user account is expired. Password Aging Feature Settings This section details only the Password Aging for Device-hosted Sessions and Password Aging for Transit Sessions mechanisms. For information on the Windows Password Aging mechanism, see Enabling Password Aging for Users in Windows Databases, page 5-19. For information on configuring local password validation options, see Local Password Management, page 7-4. Note The Password Aging feature does not operate correctly if you also use the Callback feature. When callback is used, users cannot receive password-aging messages at login. OL-14386-02
Chapter 5 User Group Management OL-14386-02 Configuration-Specific User Group Settings The Password Aging feature in ACS has the following options: Apply age-by-date rules—Configures ACS to determine password aging by date. The age-by-date rules contain the following settings: – Active period—The number of days users will be allowed to log in before being prompted to change their passwords. For example, if you enter 20, users can use their passwords for 20 days without being prompted to change them. The default Active period is 20 days. – Warning period—The number of days, after which users will be notified to change their passwords. The existing password can be used; but the ACS presents a warning indicating that the password must be changed and displays the number of days left before the password expires. For example, if you enter 5 in this box and 20 in the Active period box, users will be notified to change their passwords on the 21st through 25th days. – Grace period—The number of days for the user grace period, which allows a user to log in once to change the password. The existing password can be used one last time after the number of days specified in the active and warning period fields has been exceeded. Then, a dialog box warns the user that the account will be disabled if the password is not changed, and prompts the user to change it. Continuing with the previous examples, if you allow a 5-day grace period, a user who did not log in during the active and warning periods would be permitted to change passwords up to and including the 30th day. However, even though the grace period is set for 5 days, a user is allowed only one attempt to change the password when the password is in the grace period. ACS displays the “last chance” warning only once. If the user does not change the password, this login is still permitted, but the password expires, and the next authentication is denied. An entry is logged in the Failed-Attempts log, and the user must contact an administrator to have the account reinstated. Note All passwords expire at midnight of the date that you enter, not the time of day at which they were set. Apply age-by-uses rules—Configures ACS to determine password aging by the number of logins. The age-by-uses rules contain the following settings: – Issue warning after x logins—The number of the login after which ACS begins prompting users to change their passwords. For example, if you enter 10, users are allowed to log in 10 times without a change-password prompt. On the 11th login, they are prompted to change their passwords. Tip To allow users to log in an unlimited number of times without changing their passwords, type -1. – Require change after x logins—The number of logins after which to notify users that they must change their passwords. If this number is set to 12, users receive prompts requesting them to change their passwords on their 11th and 12th login attempts. On the 13th login attempt, they receive a prompt telling them that they must change their passwords. If users do not change their passwords now, their accounts expire and they cannot log in. This number must be greater than the Issue warning after x login number. Tip To allow users to log in an unlimited number of times without changing their passwords, type -1. Apply password change rule—Forces new users to change their passwords the first time they log in. User Guide for Cisco Secure Access Control Server 4.2 5-17
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User Guide for Cisco Secure Access
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OL-14386-02 Cloning a RADIUS Author
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