Cisco 7604 Configuration Guide - Page 206
About Authentication, About Authorization, About Accounting
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AAA Overview Chapter 11 Configuring AAA Servers and the Local Database About Authentication Authentication controls access by requiring valid user credentials, which are typically a username and password. You can configure the FWSM to authenticate the following items: • All administrative connections to the FWSM including the following sessions: - Telnet - SSH - Serial console - ASDM (using HTTPS) - VPN management access • The enable command • Network access About Authorization Authorization controls access per user after users authenticate. You can configure the FWSM to authorize the following items: • Management commands • Network access • VPN access for management connections Authorization controls the services and commands available to each authenticated user. Were you not to enable authorization, authentication alone would provide the same access to services for all authenticated users. If you need the control that authorization provides, you can configure a broad authentication rule, and then have a detailed authorization configuration. For example, you authenticate inside users who attempt to access any server on the outside network and then limit the outside servers that a particular user can access using authorization. The FWSM caches the first 16 authorization requests per user, so if the user accesses the same services during the current authentication session, the FWSM does not resend the request to the authorization server. About Accounting Accounting tracks traffic that passes through the FWSM, enabling you to have a record of user activity. If you enable authentication for that traffic, you can account for traffic per user. If you do not authenticate the traffic, you can account for traffic per IP address. Accounting information includes when sessions start and stop, username, the number of bytes that pass through the FWSM for the session, the service used, and the duration of each session. 11-2 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM OL-20748-01
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