Table of ContentsRelease Notes for Cisco Secure Access Control Server for Windows 2000/NT Servers Version 3.0
Changes to CRYPTOCard Support
Limitations and Restrictions
Tested Certificate Servers
Tested Web Browser Versions
Tested Token Server Versions
Tested LDAP Server
Tested Novell Clients
Tested Windows 2000 Service Packs
Tested Platforms for CiscoSecure Authentication Agent
Cisco VPN 3000 Concentrator
Cisco VPN 5000 Concentrator
Cisco Aironet Access Point
Cisco Catalyst Switches
Open Caveats—Version 3.0.1
Obtaining Technical Assistance
Cisco Secure ACS provides authentication, authorization, and accounting (AAA—pronounced "triple A") services to network devices that function as AAA clients, such as a network access server, PIX Firewall, or router. A AAA client is any such device that provides AAA client functionality and uses one of the AAA protocols supported by Cisco Secure ACS.
Cisco Secure ACS helps centralize access control and accounting, in addition to router and switch access management. With Cisco Secure ACS, network administrators can quickly administer accounts and globally change levels of service offerings for entire groups of users. Although the use of an external user database is optional, support for many popular user repository implementations enables companies to put to use the working knowledge gained from and the investment already made in building their corporate user repositories.
Cisco Secure ACS supports Cisco AAA clients such as the Cisco 2509, 2511, 3620, 3640, AS5200 and AS5300, AS5800, the Cisco PIX Firewall, Cisco Aironet Access Point wireless networking devices, Cisco VPN 3000-series Concentrators, and Cisco VPN 5000-series Concentrators. It also supports third-party devices that can be configured with Terminal Access Controller Access Control System (TACACS+) or Remote Access Dial-In User Service (RADIUS) protocols. Cisco Secure ACS treats all such devices as AAA clients. Cisco Secure ACS uses the TACACS+ and RADIUS protocols to provide AAA services that ensure a secure environment. For more information about support for TACACS+ and RADIUS in Cisco Secure ACS, see the Cisco Secure ACS for Windows 2000/NT Servers User Guide.
- 802.1x Support—Cisco Secure ACS support for 802.1x strengthens access control for switched LAN and wireless LAN users. 802.1x is a new access control standard proposed in the IEEE for managing port-level access control. 802.1x relies on Extensible Authentication Protocol (EAP), carried in RADIUS messages, to manage user authentication and authorization.
- EAP-MD5, EAP-TLS—In addition to LEAP, Cisco Secure ACS supports EAP-MD5 and EAP-TLS authentication. EAP is an IETF RFC standard for carrying various authentication methods over any PPP connection. EAP-MD5 is a username/password method incorporating MD5 hashing for security. EAP-TLS is a method for authenticating both Cisco Secure ACS and users with X.509 digital certificates. This method also provides dynamic session key negotiation.
- Command Authorization Sets—Command authorization sets provide a centralized mechanism to manage TACACS+ administrative control. Driven by some of the largest enterprise and service provider networks that use Cisco Secure ACS, command authorization sets provide a method to group and name device command profiles that can be paired with users, groups of users, or network device groups. A key benefit of command authorization sets is the ability to remove any requirement of individual privilege level or command restrictions on each AAA client. This feature greatly enhances the scalability and manageability of setting device command authorization restrictions for network administrators.
- MS CHAP version 2 Support and MS CHAP Password Aging Support—Cisco Secure ACS supports MS CHAP version 2. In addition, we added an MS CHAP-based password aging feature which works with the Microsoft Dial-Up Networking client, the Cisco VPN client (version 3.0 or greater), and any desktop client that supports MS CHAP. This feature prompts a user to change his or her password after a login where the user password has expired. The MS CHAP-based password-aging feature supports users who authenticate with a Windows user database and is offered in addition to password aging supported by the CiscoSecure user database.
|Note Cisco VPN 3000-series Concentrators and Cisco IOS will support MS CHAP password aging in upcoming releases. We plan to implement MS CHAP password aging in Cisco IOS using MS CHAP version 2.|
- Per-User Access Control Lists (ACLs)—This feature allows administrators to define ACLs of any length, for users or groups of users.
- Shared Network Access Restrictions (NARs)—The ability to name NARs simplifies the assignment of identical NARs to multiple users or groups of users.
- Wildcards in NARs—Cisco Secure ACS supports wildcards for designating end-user client IP addresses and ports in IP-based NARs. In CLI/DNIS-based NARs, Cisco Secure ACS supports wildcards for CLI and DNIS values. You can apply NARs to a single AAA client, a network device group, or all AAA clients. Wildcarding of AAA clients is supported by using the multiple devices per AAA client feature, described next.
- Multiple Devices per AAA Client Configuration—You can create single AAA client configurations that define a set of network devices that use the same shared key, authentication method, logging/accounting parameters. Cisco Secure ACS enables you to provide multiple IP addresses when you configure a AAA client in the HTML interface, including the use of wildcards in IP addresses.
- Multiple LDAP Lookups and LDAP Failover—Cisco Secure ACS enables you to create multiple LDAP external user database configurations. You can also define backup LDAP servers in the event that a primary LDAP server is not available.
- User-Defined RADIUS Vendor-Specific Attributes (VSAs)—Cisco Secure ACS now supports user-defined inbound and outbound RADIUS VSAs.
- Improved User Documentation—We reorganized and heavily revised the online documentation and Cisco Secure ACS for Windows 2000/NT Servers Version 3.0 User Guide. We rewrote and expanded Installing Cisco Secure ACS 3.0 for Windows 2000/NT Servers. We heavily revised Web Server Installation for Cisco Secure ACS 3.0 for Windows 2000/NT User-Changeable Passwords
Before Cisco Secure ACS 3.0.1, support for CRYPTOCard token servers used the vendor-proprietary interface provided with the CRYPTOCard token server. Beginning with Cisco Secure ACS 3.0.1, we support CRYPTOCard token servers using a standard RADIUS interface.
If you upgrade to Cisco Secure ACS 3.0 and had configured CRYPTOCard authentication in the previous installation of Cisco Secure ACS, the installation program prompts you for information about the CRYPTOCard RADIUS server. With this information, the installation program replaces the older CRYPTOCard configuration with a new one that uses the RADIUS interface of the CRYTPOCard easyRADIUS server. To use the RADIUS interface of the CRYPTOCard server, be sure the CRYPTOCard easyRADIUS server is installed on a CRYPTOCard Windows server. For more information about CRYPTOCard easyRADIUS, see CRYPTOCard documentation.
We successfully tested running Cisco Secure ACS and the CRYPTOCard easyRADIUS server on the same Windows server. Testing occurred on Windows NT 4.0 with Service Pack 6 and Windows 2000 with Service Pack 2. We used versions 5.0 and 5.1 of the CRYPTOCard easyRADIUS server. However, we do not recommend that you run the CRYPTOCard easyRADIUS server on the same Windows server that runs Cisco Secure ACS. If you choose to do so, be sure that Cisco Secure ACS and CRYPTOCard easyRADIUS use different ports to receive RADIUS requests.
You can change the UDP ports used by the CRYPTOCard RADIUS server by editing its services file, usually located in c:\WINNT\system32\drivers\etc. For more information about the UDP ports used by the CRYPTOCard RADIUS server and how to change them, see your CRYPTOCard documentation.
The evaluation version of Cisco Secure ACS 3.0 provides full functionality for 90 days after the date of installation. This allows you to use all the features of Cisco Secure ACS 3.0 while determining if it suits your needs. The evaluation version of Cisco Secure ACS 3.0 will be available 30 days after the release of the commercial version of Cisco Secure ACS 3.0.
When the evaluation period has elapsed, the CSRadius and CSTacacs services fail to start. You will receive a message upon accessing the administrative interface notifying you that your evaluation period has elapsed.
Please contact your Cisco Sales Representative(s) to inquire about purchasing the commercial version of Cisco Secure ACS. To purchase the full, retail version of Cisco Secure ACS 3.0 online, use Part Number CSACS-3.0 at the following URL:
After purchasing a commercial version of Cisco Secure ACS 3.0, you can upgrade your Cisco Secure ACS server from the evaluation version to the commercial version by installing the commercial version over the evaluation version. For information on installing Cisco Secure ACS 3.0, follow the instructions in Installing Cisco Secure ACS 3.0 for Windows 2000/NT Servers.
Cisco Secure ACS has not been interoperability tested with other Cisco software. Other than the software and operating system versions listed in this document, we performed no interoperability testing. Using untested software with Cisco Secure ACS may cause undesired results. For the best performance of Cisco Secure ACS, we recommend that you use the versions of software and operating systems listed in this document.
Cisco Secure ACS 3.0.1 supports CRYPTOCard, ActivCard, and Vasco token servers using a common RADIUS token server interface. We tested the common RADIUS token server interface using ActivCard Token Server version 3.1.
For information about CRYPTOCard support, see the "Changes to CRYPTOCard Support" section.
If you are using a Novell NDS database as an external user database, the Novell Requestor software must be installed on the Cisco Secure ACS server. We tested Cisco Secure ACS 3.0.1 with the Novell Requestor software found in Novell Client version 4.8 for Windows NT 4.0 and Windows 2000.
- CSCdv61239: TACACS+ Command Accounting updates logged in user list
- CSCdv42366: Documentation wrong about admin failed attempts feature
- CSCdv41922: CSMon logs confusing message during replication
- CSCdv25235: Replication occurs every other time regardless on need
- CSCdv24984: / in port field of Network Access restriction breaks
- CSCdu87549: Timeouts required for LDAP searches
- CSCdu65240: Inter version replication failure error not logged
- CSCdu65230: Cross version replication error not in docs
- CSCdu65207: Windows DLL error logging inadequate
- CSCdu65095: add Usage Quota w/ Netscape in Interface Config removes options
- CSCdu63791: T+ enable partially broken for external db users
- CSCdu61901: Cant add userID in lowercase after adding it in uppercase
- CSCdu41846: Group map for LDAP fails with large numbers of groups
- CSCdu37391: RDBMS Sync docs are incomplete
- CSCdu36350: Documentation bug : LDAP and CHAP are not supported together
- CSCdu02875: CSNT documentation incorrect
- CSCdt91325: Delayed response to Safeword challenge crashes CSAuth
- CSCdt75695: When upgrading from 2.4 to 2.6 it doesnot update safeword token dll
- CSCdt73381: Set password source to External ODBC during RDBMS synchronization
- CSCdt72305: EAP-Message still available for edit in group profile
- CSCdt63400: CSNT port 2000 conflict with CCM
- CSCds43324: NDGs should be definable within NARs rather than individual NAS
- CSCdw22345: Replication fails on an upgraded ACS
If Cisco Secure VPN Client version 1.1 is installed on the Windows NT 4.0 server on which you are installing Cisco Secure ACS, Cisco Secure ACS fails to install, with an error message about the following file:
The user interface does not allow an administrator to change the default RADIUS authentication (1645) and accounting (1646) ports. Routers using Cisco IOS versions later than 12.1 have changed their default behavior to reflect the new ports of 1812 for authentication and 1813 for accounting.
Workaround/Solution: Cisco Secure ACS now supports both pairs of ports for RADIUS authentication and accounting. Ports 1645 and 1812 are used for RADIUS authentication; ports 1646 and 1813, for RADIUS accounting.
If you need to use ports other than those supported by Cisco Secure ACS, you can change the ports used for RADIUS authentication and accounting by editing attribute values of the proper key in the Windows Registry. The ports are the AccountingPort and AuthenticationPort attributes of the following key:
Workaround/Solution: Cisco Secure ACS does not support this style of user name when authenticating against an external Windows 2000 server. Continue to prefix account names with the NT 4.0-style domain name.
- Dial-up clients only need to be able to connect to your network if you intend to support dial-up access. If not, this is not a requirement for installing Cisco Secure ACS.
- Only Cisco IOS devices need to be running Cisco IOS release 11.1 or later. Other devices, such as supported versions of the Cisco Aironet Access Point, do not need to be running Cisco IOS.
- The supported web browsers must also have a Java virtual machine installed in order to support the Cisco Secure ACS administration interface.
- CSCds88673: Timeout issue for Aironet client causing authentication problem
A PPTP tunnel using a Cisco VPN 3000-series concentrator and MS-CHAP version 2 fails. The VPN concentrator indicates that authentication passed; however, tunnel establishment fails. When using the MS-CHAP version 1 method with the same configuration, tunnel establishment succeeds. When using the concentrator's internal user database with MS-CHAP version 2, tunnel establishment succeeds.
Setup two users at least on Cisco Secure ACS, one as a tunnel user and the others as the authenticated users. The tunnel user and its password should be the same as the tunnel group name on the concentrator and its password.
- In "IETF RADIUS Attributes" check the " Class" attribute and the following value should be entered in the text box: "ou=groupname;" where groupname is the name of the tunnel user name previously configured.
- In "Microsoft RADIUS Attributes", select the "[311\012] MS-CHAP-MPPE-Keys" check box.
- Add a group name similar to the tunnel users name, and in the "Cisco VPN 3000 Concentrator RADIUS Attributes" select the [3076\011] CVPN3000-Tunneling-Protocols check box and the [3076\020] CVPN3000-PPTP-Encryption check box.
- Select the [3076\011] CVPN3000-Tunneling-Protocols check box, then select PPTP from the corresponding list.
- Select the [3076\020] CVPN3000-PPTP-Encryption check box, then select 128-bit or lower from the corresponding list, according to the client encryption capability
Workaround/Solution: Configure this feature for users first (rather than for a group). Then, reconfigure this feature for a group. After doing so, this feature works on a group level. All failed attempts are registered in the failed attempts log as "T+ enable privilege too low."
During installation, if you use an IP address of 10.0.10.255 with a 23-bit subnet mask (255.254.0.0), the installation fails with an error message indicating that you cannot use a broadcast IP address.
Workaround/Solution: On the Cisco Secure ACS server, configure all Cisco Secure ACS services to run using a domain administrator account for the domain of which the server is a member. For more information about additional configuration required to run Cisco Secure ACS 3.0 on a Windows NT 4.0 member server, see Installing Cisco Secure ACS 3.0 for Windows 2000/NT Servers.
If you use Netscape Navigator v.4.7 to access the HTML interface, adding an administrator to Cisco Secure ACS can cause 100% CPU utilization for over a minute. This in turn can cause the CSRadius service to pause until the browser resumes normal operation. The fault lies in the Netscape browser rather than Cisco Secure ACS.
Workaround/Solution: Once the 100% CPU utilization has begun, wait until browser operation returns to normal. This should be less than five minutes. To avoid the behavior altogether, use a tested version of Microsoft Internet Explorer. See the Tested Web Browsers section of the Release Notes for Cisco Secure Access Control Server for Windows 2000/NT Servers
When a Novell NDS database configuration in Cisco Secure ACS has a context list greater than 4095 characters long, editing the NDS configuration page results in incorrect HTMLin the browser interface.
Workaround/Solution: After renaming a user-defined attribute, restart all Cisco Secure ACS services from the Windows Control Panel. Once the services have been restarted, the CSV RADIUS Accounting configuration screen shows the renamed attributes and remembers their selection when the page is submitted.
When Cisco Secure ACS is configured to send ODBC logging to an MS SQL database, some accounting records are missing. Connections to the ODBC database are never closed, and eventually open connections can use up all the virtual memory on the server.
Workaround/Solution: Cisco Secure ACS 3.0 partially resolves the undesired behavior. While fractional truncation may occur, the connection to the ODBC database is closed and reopened without adverse effect on virtual memory.
Changes to user-defined fields in user records do not appear to replicate. After the user-defined fields are changed in the Interface Configuration section on the primary Cisco Secure ACS server and replication succeeds, the secondary Cisco Secure ACS server does not display the changes to the user-defined fields in the HTML interface.
Changes to HTTP Port Allocation settings do not appear to replicate. After the HTTP Port Allocation settings are changed on the Access Policy Setup page in the Administration Control section on the primary Cisco Secure ACS server and replication succeeds, the secondary Cisco Secure ACS server does not display the changes to the HTTP Port Allocation settings in the HTML interface.
In the System Configuration section, settings made on the VoIP Account Configuration page are not restored from backup. Neither are these settings preserved during reinstallation of Cisco Secure ACS 3.0 or upgrading to a later build of Cisco Secure ACS 3.0.
In the External User Databases section, settings on the MS-CHAP Settings table on the Windows NT/2000 User Database Configuration page are not preserved when reinstalling Cisco Secure ACS 3.0 or upgrading to a later build of Cisco Secure ACS 3.0.
If neither MS-CHAP version is enabled in System Configuration and a user attempts to authenticate with MS-CHAP, Cisco Secure ACS attempts a PAP authentication using the Windows external user databases, which will fail and result in a failed login attempt. This can result in locked out users even though no MS-CHAP authentication using a Windows database is allowed.
If a user who usually authenticates with an AXENT token server receives a password challenge, leaves the password field blank, and presses Enter, the CSAuth service fails. The log for CSAuth contains entries similar to:
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