Cisco ASA 5505 - Manual (Page 788)

38-14
Cisco ASA 5500 Series Configuration Guide using the CLI
Chapter 38 Configuring AAA Rules for Network Access
Configuring Authorization for Network Access
hostname(config-aaa-server-host)# key TACPlusUauthKey
hostname(config-aaa-server-host)# exit
hostname(config)# aaa authentication match TELNET_AUTH inside AuthOutbound
hostname(config)# aaa authorization match SERVER_AUTH inside AuthOutbound
Configuring RADIUS Authorization
When authentication succeeds, the RADIUS protocol returns user authorizations in the access-accept
message sent by a RADIUS server. For more information about configuring authentication, see the
“Configuring Network Access Authentication” section on page 38-4 .
When you configure the ASA to authenticate users for network access, you are also implicitly enabling
RADIUS authorizations; therefore, this section contains no information about configuring RADIUS
authorization on the ASA. It does provide information about how the ASA handles access list
information received from RADIUS servers.
You can configure a RADIUS server to download an access list to the ASA or an access list name at the
time of authentication. The user is authorized to do only what is permitted in the user-specific access list.
Note If you have used the access-group command to apply access lists to interfaces, be aware of the following
effects of the per-user-override keyword on authorization by user-specific access lists:
• Without the per-user-override keyword, traffic for a user session must be permitted by both the
interface access list and the user-specific access list.
• With the per-user-override keyword, the user-specific access list determines what is permitted.
For more information, see the access-group command entry in the command reference.
This section includes the following topics:
• Configuring a RADIUS Server to Send Downloadable Access Control Lists, page 38-14
• Configuring a RADIUS Server to Download Per-User Access Control List Names, page 38-18
Configuring a RADIUS Server to Send Downloadable Access Control Lists
This section describes how to configure Cisco Secure ACS or a third-party RADIUS server and includes
the following topics:
• About the Downloadable Access List Feature and Cisco Secure ACS, page 38-14
• Configuring Cisco Secure ACS for Downloadable Access Lists, page 38-16
• Configuring Any RADIUS Server for Downloadable Access Lists, page 38-17
• Converting Wildcard Netmask Expressions in Downloadable Access Lists, page 38-18
About the Downloadable Access List Feature and Cisco Secure ACS
Downloadable access lists is the most scalable means of using Cisco Secure ACS to provide the
appropriate access lists for each user. It provides the following capabilities:
• Unlimited access list size—Downloadable access lists are sent using as many RADIUS packets as
required to transport the full access list from Cisco Secure ACS to the ASA.