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These release notes pertain to Cisco Secure Access Control Server for Windows 2000/NT Servers (Cisco Secure ACS) Version 2.5.
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Warning Please see the README file on the CD-ROM for late-breaking information. |
Cisco Secure ACS is network security software that helps you authenticate users by controlling dial-in access to a network access server (NAS) device, such as an access server, PIX Firewall, or router.
Cisco Secure ACS operates as a Windows NT or Windows 2000 service and controls the authentication, authorization, and accounting (AAA) of users accessing networks. Cisco Secure ACS operates with Windows NT Version 4.0 Server and Windows 2000 Server.
Cisco Secure ACS helps centralize access control and accounting for dial-up access servers and firewalls as well as management of access to routers and switches. With Cisco Secure ACS, service providers can quickly administer accounts and globally change levels of service offerings for entire groups of users. The tight integration of Cisco Secure ACS with the Windows NT and Windows 2000 operating systems enables companies to put to use the working knowledge gained from and the investment already made in building their Windows NT and Windows 2000 network.
For a list of new and changed features in Cisco Secure ACS 2.5, see Chapter 1, "Overview of Cisco Secure Access Control Server for Windows NT/2000 Servers," in Cisco Secure Access Control Server for Windows 2000/NT Servers User Guide.
For the system requirements of Cisco Secure ACS 2.5, see Chapter 1, Chapter 1, "Overview of Cisco Secure Access Control Server for Windows NT/2000 Servers," in Cisco Secure Access Control Server for Windows 2000/NT Servers User Guide.
Cisco Secure Access Control Server for Windows 2000/NT Servers User Guide also provides detailed information about configuring and using Cisco Secure ACS. This guide is available via Cisco Connection Online or on the product CD-ROM.
For information about installing Cisco Secure ACS, see the Installing Cisco Secure ACS 2.5 for Windows 2000/NT Server quick reference card.
Information regarding messages or warnings that may arise during installation can be found in the README file, located on the CD-ROM.
The following topics are limitations and restrictions that apply to Cisco Secure ACS 2.5.
To administer all features included in Cisco Secure ACS 2.5, it is important that you use a supported web browser. Cisco Systems tested Cisco Secure ACS 2.5 using Microsoft Internet Explorer versions 5.0.x and 5.5, and Netscape Communicator versions 4.72, 4.73, and 4.75. Other versions of these browsers and web browsers by other manufacturers are not supported.
In order to implement 128-bit encryption, there are restrictions you need to be aware of. If users connect to your network with the Microsoft Dial-Up Network client and establish a virtual private network (VPN) tunnel using Point-to-Point Tunneling Protocol with Microsoft Point-to-Point Encryption, the NAS through which users connect to the network must be one of three types:
Both the NAS and the Microsoft Dial-Up Network client must have 128-bit encryption installed. For the Microsoft Dial-Up Network client, this requires the High Encryption pack. For users on Microsoft Windows 95/98/NT 4.0, install the 128-bit encryption package included with Internet Explorer 5.5. Internet Explorer is available at the following address:
http://www.microsoft.com/windows/ie/download/ie55.htm
For users on Microsoft Windows 2000, download the High Encryption pack for Windows 2000. The High Encryption pack is available at the following address:
http://www.microsoft.com/windows2000/downloads/recommended/encryption/
While Cisco Secure ACS 2.5 does support Windows 2000 Server, Advanced Server, and Data Center (without Microsoft Clustering enabled), it does not support Service Pack 1 for Windows 2000. Do not install Service Pack 1 for Windows 2000 on your Cisco Secure ACS Windows 2000 server.
The Cisco Secure ACS CiscoSecure Authentication Agent is supported only on the following client platform operating systems:
Cisco Systems has not tested the CiscoSecure Authentication Agent on the following client platform operating systems:
This section identifies caveats and issues for Cisco Secure ACS.
Refer to the appropriate release notes for information about hardware caveats that might affect Cisco Secure ACS. You can access these release notes online at the following addresses:
http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120cavs/
index.htm
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121relnt/
121cavs/index.htm
This section identifies known caveats and issues with Cisco Secure ACS 2.5.
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:
This file is necessary for the VPN Client to work properly.
Workaround/Solution: Exit the Cisco Secure ACS installation, uninstall Cisco Secure VPN Client from the server, install Cisco Secure ACS 2.5, and then reinstall Cisco Secure VPN Client.
AXENT token-card server external user databases do not work with Cisco Secure ACS 2.5. This includes all versions of AXENT token-card servers.
Workaround/Solution: None at this time. Customers using AXENT token-card servers as external user databases with Cisco Secure ACS should not upgrade to Cisco Secure ACS 2.5.
After upgrading to Cisco Secure ACS 2.5, administrators are still only able to see 100 groups.
Workaround/Solution: This is expected behavior. By default, the additional 400 groups available in Cisco Secure ACS 2.5 are not added to the list of groups each administrator can configure.
To allow an administrator to configure the additional 400 groups, edit the administrator's privileges to permit the administrator to configure the additional groups.
If Service Pack 1 is installed on a Windows 2000 server running Cisco Secure ACS 2.5, CiscoSecure Control Message Protocol fails. This causes the User-Changeable Password feature to fail. Users will not receive notification of passwords that are about to expire and they will not receive notification from the CiscoSecure Authentication Agent.
Workaround/Solution: Do not apply Service Pack 1 to any Windows 2000 server running Cisco Secure ACS. If Service Pack 1 has already been installed, uninstall Service Pack 1. See Windows 2000 Service Pack 1 Not Supported.
If Service Pack 1 is installed on a Windows 2000 server running Cisco Secure ACS 2.5, External Database Group Mapping incorrectly reports SDI user profiles. Some users whose accounts are maintained by an SDI token-card server appear in the wrong Cisco Secure ACS group.
Workaround/Solution: Cisco Secure ACS 2.5 does not support Service Pack 1 for Windows 2000.
To restore proper group mapping, uninstall Service Pack 1 from your Windows 2000 server. See Windows 2000 Service Pack 1 Not Supported.
With Netscape Communicator 4.76 on Windows 2000, clicking one of the green navigation buttons at the top of the Edit Group page causes Netscape 4.76 to wait indefinitely.
Workaround/Solution: Change the Windows application focus by opening a folder on the desktop. Netscape will immediately jump to the correct Cisco Secure ACS administrative web page. See Supported Web Browser Versions.
When you are configuring a Cisco IOS router to enable the AAA paradigm, there is always a slight risk that the administrative Telnet or console session may be lost. If an administrative Telnet or console session is lost while enabling the AAA paradigm on a Cisco IOS router, the administrator is locked out of the router.
Workaround/Solution: Enabling the AAA paradigm with the command aaa new-model on a Cisco IOS router has important ramifications that a user must be aware of when configuring these devices for the first time. At a minimum the following commands should be entered in the order shown:
[global configuration]username
aaa new-model
username password password
aaa authentication login default local group [security protocol]
where username is the username is the username for the new local account and password is the password for the new local account.
Specifying the "local" method enables users to re-establish their Telnet or console session and use the locally defined authentication list to access the router once more. If not, physical access to the router is required (console session), with a minimum of having to perform a password recovery sequence. At worst, the entire configuration saved in NVRAM can be lost.
The user interface does not allow an administrator to change the default RADIUS authentication (1645) and accounting (1646) ports. Cisco IOS routers after versions 12.1(x) 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 currently 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:
HKEY_LOCAL_MACHINE\SOFTWARE\CISCO\CiscoAAAv2.5\
CSRadius
After changing the port attribute values, restart the Cisco Secure ACS server.
If the active Primary Domain Controller (PDC) for a Windows NT domain is unavailable, you cannot use the Cisco Secure ACS administrative user interface to configure the group mappings for this domain.
Workaround/Solution: If the configuration changes are not vital, wait until the PDC becomes available again. Otherwise, promote a suitable Backup Domain Controller to the role of PDC.
Windows 2000 allows users to enter their username as username@domain-name. For example, fred@domain.com. This format is equivalent to entering the Windows NT 4.0 username of DOMAIN/fred.
Workaround/Solution: Cisco Secure ACS does not support this style of username when authenticating against an external Windows 2000 server. Continue to prefix account names with the NT 4.0-style domain name.
A few of the NASes supported by Cisco Secure ACS either do not support "new PIN mode" functionality or support it in a limited fashion. New PIN mode is when token-card users can be required to enter new PINs at login.
The following two types of NASes do not support new PIN mode functionality:
Additionally, Cisco IOS routers can support new PIN mode functionality with specific configuration.
Workaround/Solution: There is no workaround if the NAS is a Cisco Secure VPN 3000 Concentrator or a Cisco Secure PIX Firewall.
For Cisco IOS routers, new PIN mode functionality is supported if the routers are configured as described here. The Microsoft DUN for token-card users must be configured to enable Bring up a terminal window after dialing. The Cisco IOS router through which users are accessing the network must be configured as follows:
Users would be presented with a terminal window in which they would change their PINs. After the PIN was reset, users could start a PPP session manually or a script could be configured to start PPP automatically.
The Sample Configurations chapter of the user guide has errors in examples depicted. In NAS Configuration under the Password Aging and User-Changeable Passwords Using CiscoSecure ACS with CAA section, the example is written with the assumption that IP address assignment for a dial-up user is assigned by the NAS itself, yet it does not give sufficient configuration for IP address assignment to be handled by the NAS.
The chapter also references Cisco IOS Release 11.5T, which does not exist.
Workaround/Solution: In order to depict accurately a configuration where the NAS handles IP address assignment, the NAS configuration example should have the following line in its global configuration section:
ip local pool setup_pool xxx.xxx.xxx.xxx yyy.yyy.yyy.yyy
where xxx.xxx.xxx.xxx is the starting IP address of the IP address range and yyy.yyy.yyy.yyy is the ending IP address of the IP address range. The IP address range defined should be a part of a subnet belonging to a routeable interface connected to the corporate network.
References to Cisco IOS Release 11.5T should refer to Cisco IOS Release 12.0.
The following sections describe updates to the published documentation for Cisco Secure ACS 2.5.
In the "Overview of Cisco Secure Access Control Server for Windows NT/2000 Servers" chapter within the Online Documentation section of Cisco Secure ACS 2.5, the first note under "Software Requirements" now reads as follows:
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Note Cisco Secure ACS 2.5 operates with Windows NT Server version 4.0 or Windows 2000. As a Windows NT 4.0 Server, Cisco Secure ACS can be a Primary Domain Controller, a Backup Domain Controller, or a Member Server. If Cisco Secure ACS 2.5 is installed on a Member Server, the Member Server must be a member of its domain. |
In the "User Databases" chapter within the Online Documentation section of Cisco Secure ACS 2.5, within the first paragraph after Figure 3-1, the word "exponentially" has been replaced with the word "logarithmically."
In Chapter 1, "Overview of Cisco Secure Access Control Server for Windows NT/2000 Servers," the first note on page 1-4 now reads as follows:
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Note Cisco Secure ACS 2.5 operates with Windows NT Server version 4.0 or Windows 2000. As a Windows NT 4.0 Server, Cisco Secure ACS can be a Primary Domain Controller, a Backup Domain Controller, or a Member Server. If Cisco Secure ACS 2.5 is installed on a Member Server, the Member Server must be a member of its domain. |
In Chapter 3, "User Databases," on page 3-2, the word "exponentially" has been replaced with the word "logarithmically."
The second paragraph under "Product Summary" on page 1 now reads as follows:
Cisco Secure ACS 2.5 operates with Windows NT Server version 4.0 or Windows 2000. As a Windows NT 4.0 Server, Cisco Secure ACS can be a Primary Domain Controller, a Backup Domain Controller, or a Member Server. If Cisco Secure ACS 2.5 is installed on a Member Server, the Member Server must be a member of its domain.
The following documents directly support Cisco Secure ACS:
In addition to these documents, online documentation is provided within the Cisco Secure ACS user interface. The entire Cisco Secure ACS documentation set is also available from the following address:
http://www.cisco.com/warp/public/cc/pd/sqsw/sq/
The following sections provide sources for obtaining documentation from Cisco Systems.
You can access the most current Cisco documentation on the World Wide Web at the following sites:
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.
Cisco documentation is available in the following ways:
http://www.cisco.com/cgi-bin/order/order_root.pl
http://www.cisco.com/go/subscription
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