Exam Essentials

Remember the ways to get user information onto the CiscoSecure User Database. There are three ways to populate the CiscoSecure User Database: manually, through the Database Replication utility, and through the Database Import utility.

Know how to access the CS ACS web-based administration utility. To bring up the web-based administration tool using a web browser, go to the IP address of the CS ACS server, port 2002.

Remember which third-party user databases CS ACS supports. CiscoSecure ACS supports Microsoft Windows NT, Novell NDS, Directory Services, MCIS LDAP, and ODBC databases.

Remember which relational databases CSU supports. CSU (CiscoSecure ACS 2.3 for Unix) supports Sybase, Oracle, and SQL Anywhere databases.

Know the advantages of TACACS+ over RADIUS. The advantages of TACACS+ include encrypted packets versus encrypted passwords in RADIUS and the use of TCP rather than UDP. TACACS+ also treats authentication, authorization, and accounting as separate roles; RADIUS combines authentication and authorization.

Understand how to set an encryption key on the NAS. To set the encryption key on a TACACS+ server, use the following commands:

Todd(config)#tacacs-server host 192.168.254.253

Todd(config)#tacacs-server key d$y!tR%e

The tacacs-server host hostname | ip address command specifies the IP address or the host name of the remote TACACS+ server host. The tacacs-server key key command specifies a shared secret text string used between the access server and the TACACS+ server. You can use the same commands for a RADIUS server; just exchange the keyword tacacs-server for radius-server.

Key Terms

Before you take the exam, be certain you are familiar with the following terms:

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Commands Used in This Chapter

Here is the list of commands used in this chapter:

Command Meaning

(config-line)#login authentication Specifies that the named AAA authentication list no_tacacs is to be used on the console.

(config)#aaa accounting network Sends both a start and a stop accounting record wait-start radius to the RADIUS accounting server. The requested

service cannot start until the acknowledgment has been received from the RADIUS server.

Written Lab

This section asks you 10 write-in-the-answer questions to help you understand the technology that you need to know in order to pass the SECUR exam.

1.True or False: The authentication methods supported by CiscoSecure 3.0 include Windows NT/2000, Novell Directory Services (NDS), and ACS Databases.

2.True or False: CS ACS supports the following token-card servers from CiscoSecure 3.0: Windows NT/2000, Novell Directory Services (NDS), and ACS Databases.

3.True or False: In the command aaa authentication login default tacacs+ none, the none keyword at the end means that if the TACACS+ process is unavailable, no login is required.

4.What are the three relational databases that CSU supports?

5.The CS ACS web server listens on TCP port 2002. What is the URL for the default CS ACS web server?

6.What command sets AAA accounting for all network-related service requests, including PPP, and records the start and stop times of the session against the TACACS+ database?

7.TACACS+ uses _____ as a transport protocol and RADIUS uses _____ as a transport protocol.

8.What command sets the AAA accounting for EXEC processes on the NAS to record the start and stop times of the session against the TACACS+ database?

9.Which service is used to process the ODBC import tables and updates the local and remote CiscoSecure ACS installations?

10.You must have an IOS of _____ or greater on the NAS to support CiscoSecure ACS 3.0.

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Review Questions

1.CiscoSecure ACS 3.0 for Windows NT or Windows 2000 supports which of the following authentication methods? (Choose all that apply.)

A.Novell Directory Services (NDS)

B.Banyan StreetTalk

C.DNS

D.POP

E.ODBC

F.DS

2.Which of the following token-card servers can be used with CS ACS 3.0? (Choose all that apply.)

A.Microsoft

B.AXENT Defender

C.CRYPTOCard

D.Novell NDS

E.ODBC

3.Which of the following are true with regard to the following command? (Choose all that apply.)

Router(config)#aaa authentication login default tacacs+ none

A.No authentication is required to log in.

B.TACACS+ is the default login method for all authentication.

C.If the TACACS+ process is unavailable, no access is permitted.

D.RADIUS is the default login method for all authentication.

E.If the TACACS+ process is unavailable, no login is required.

F.If the RADIUS process is unavailable, no login is required.

4.CiscoSecure ACS for Unix (CSU) supports which of the following relational databases? (Choose all that apply.)

A.Sybase

B.Informix

C.PIX

D.Oracle

E.SQL Anywhere

5.You have just finished installing CS ACS and are on the console of the server where you installed the package. Which of the following URLs allow you to access the web-based administration tool to configure CS ACS?

A.http://127.0.0.1

B.http://127.0.0.1:2002

C.http://127.0.0.1/80

D.http://127.0.0.1:80

6.Which of the following is true regarding the following command? (Choose all that apply.)

Router(config)#aaa account network wait-start radius

A.The accounting records are stored on a TACACS+ server.

B.Stop accounting records for network service requests are sent to the TACACS+ server.

C.The accounting records are stored on a RADIUS server.

D.Start accounting records for network service requests are sent to the local database.

E.Stop accounting records for network service requests are sent to the RADIUS server.

F.The requested service cannot start until the acknowledgment has been received from the RADIUS server.

7.Which of the following statements are true regarding this debug output? (Choose all that apply.)

16:43:35: TAC+: Receiving TCP/IP packet number 415842422-6 from192.168.254.253/24

16:43:35: TAC+: (415842422): received authen response status =FAIL 16:43:35: TAC+: Closing TCP/IP connection to 192.168.254.10

A.The request used the RADIUS protocol.

B.The authentication completed.

C.The authentication failed.

D.The request used the TACACS+ protocol.

E.The address of the NAS was 192.168.254.10.

F.The debug tacacs command was used.

8.Which command would you use to cause a start accounting record for PPP to be sent to a TACACS+ server?

A.aaa authentication pppstart tacacs+

B.aaa authorization exec default tacacs+

C.aaa authorization network default tacacs+

D.aaa accounting network default stop-only tacacs+

E.aaa accounting network default start-stop tacacs+

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9.Which of these statements are true about the following debug output? (Choose all that apply.)

05:06:00: AAA/AUTHEN (3168314283): status = GETPASS 05:06:00: AAA/AUTHEN/CONT (3168314283): Method=ENABLE 05:06:00: AAA/AUTHEN (3168314283): status = PASS

A.The request used the RADIUS protocol.

B.The authentication completed.

C.The authentication failed.

D.The request used the TACACS+ protocol.

E.The debug tacacs command was used.

F.The debug aaa authentication command was used.

10.Which of the following is the recommended security database protocol for use between the NAS and ACS?

A.RADIUS

B.Kerberos

C.PPP

D.TACACS+

11.What does the following command provide?

Router(config)#aaa accounting exec start-stop tacacs+

A.It allows the executive users group to use a TACACS+ server for local authentication.

B.It documents the start and stop of a session. Audit information is sent in the background, and TACACS+ is enabled.

C.It allows the administration group to use a TACACS+ server for local authentication.

D.It deletes the start and stop of a session information from the TACACS+ server.

12.Which of these statements are true regarding the following command? (Choose all that apply.)

Router(config)#aaa authentication login default tacacs+

A.No authentication is required to log in.

B.TACACS is the default login method for all authentication.

C.If the TACACS process is unavailable, no access is permitted.

D.RADIUS is the default login method for all authentication.

E.If the TACACS process is unavailable, no login is required.

F.If the RADIUS process is unavailable, no login is required.

13.You want to import ODBC tables and update local and remote CiscoSecure ACS installations. What service will you use?

A.CSAdmin

B.CSAimporter

C.CSAccupdate

D.CSACSupdate

14.What does the following command provide?

Router(config)#tacacs-server key key

A.It specifies a shared secret text string used between the access server and the RADIUS server.

B.It specifies a shared secret text string used between the access server and the local ACS server database.

C.It specifies a shared secret text string used between the access server and the TACACS+ server.

D.It specifies an open secret text string used between the access server and the TACACS+ server.

15.Which of the following commands is used to start the AAA process on the NAS?

A.aaa newmodel

B.aaa new-model

C.aaa new model

D.aaa open

E.aaa config

16.Which external databases are supported by CiscoSecure ACS for Windows? (Choose all that apply.)

A.NetWare NDS

B.Oracle

C.Windows NT/2000

D.Token Server

E.SQL-Linux

F.AAA

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17.You are installing ACS 3.0. What version of IOS must be installed on the NAS?

A.11.0 or greater

B.11.1 or greater

C.12.0 or greater

D.12.2 or greater

18.Which of the following are valid types of authentication supported by CiscoSecure ACS 3.0.1? (Choose all that apply.)

A.LEAP

B.EAP-MD5

C.HDLC

D.EAP-TLS

E.DH-1

F.AAA

19.Which command do you use to set the key for RADIUS communications between a router and the AAA server?

A.radius-server host ip_address

B.radius server host ip_address

C.radius-server key key

D.radius server key key

20.Which of the following statements regarding the CiscoSecure ACS are true? (Choose all that apply.)

A.Multiple NAS devices can access a single CiscoSecure ACS 3.0 for Windows.

B.The CiscoSecure ACS for Windows server can only log on to external servers.

C.The CiscoSecure ACS for Windows server supports only TACACS+.

D.Database replication is supported by the CiscoSecure ACS for Windows server.

E.The service used for authentication and authorization on a CiscoSecure ACS for Windows server is called CSAdmin.

F.The CiscoSecure ACS for Windows servers uses the CSDBsynch service to manage the user and group accounts.