By Vivek Santuka
Cisco's whole, authoritative consultant to Authentication, Authorization, and Accounting (AAA) suggestions with CiscoSecure ACS
This is the 1st entire, authoritative, single-source consultant to enforcing, configuring, and dealing with Authentication, Authorization and Accounting (AAA) identification administration with CiscoSecure entry keep watch over Server (ACS) four and five. Written by means of 3 of Cisco's such a lot skilled CiscoSecure product aid specialists, it covers all AAA strategies (except NAC) on Cisco routers, switches, entry issues, firewalls, and concentrators. It additionally completely addresses either ACS configuration and troubleshooting, together with using exterior databases supported through ACS. each one of this book's six sections makes a speciality of particular Cisco units and their AAA configuration with ACS. every one bankruptcy covers configuration syntax and examples, debug outputs with motives, and ACS screenshots. Drawing at the authors' adventure with a number of thousand aid instances in organisations of every kind, AAA id administration Security provides pitfalls, warnings, and suggestions all through. every one significant subject concludes with a pragmatic, hands-on lab situation akin to a real-life answer that has been generally carried out via Cisco shoppers. This booklet brings jointly an important details that used to be formerly scattered throughout a number of resources. will probably be imperative to each specialist working CiscoSecure ACS four or five, in addition to all applicants for CCSP and CCIE (Security or R and S) certification.
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Additional resources for AAA Identity Management Security
Password Aging: For password security, password aging can be configured on ACS to force users to change passwords after a specified date or number of login attempts. ■ User Changeable Password: This is a separate web-based application available that can be integrated with Cisco ACS to enable users to change their password. ■ Max Sessions: For limiting the concurrent sessions available to a group or a user. ■ Dynamic Usage Quotas: To limit network access of each user in group or a user. Table 2-1 Protocol-Database Compatibility EAP-FAST EAP-FAST (Phase (Phase Zero) Two) ACS Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Windows SAM Yes No Yes Yes Yes No No No Yes Yes No Yes Yes Windows AD Yes No Yes Yes Yes No No Yes Yes Yes Yes Yes Yes LDAP Yes No No No No No No Yes No No Yes No Yes ODBC Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes LEAP Proxy RADIUS Server Yes Yes Yes Yes Yes Yes Yes Yes Token Server Yes No No No Yes No No No No No No No No Chapter 2: Cisco Secure ACS 27 Database ASCII/ CHAP MSMSLEAP ARAP EAP- EAP- PEAP PEAP(EAP- PEAP PAP CHAPv1 CHAPv2 MD5 TLS (EAP- MSCHAPv2) (EAPTLS) GTC) 28 AAA Identity Management Security ■ Shared Profile Component: Under the Shared Profile section on ACS you can configure authorization profiles, which can be applied to multiple groups or users later on.
Figure 1-5 A RADIUS Exchange Authorization within RADIUS is done in conjunction with authentication. As a server returns an Access-Accept message, it also includes the list of AV pairs that the user is authorized for. RADIUS Accounting RADIUS accounting is performed by sending messages at the start and the stop of a session. These messages include information about the session. Information that might be included includes time, packets, bytes, and so on. These messages are sent using UDP port 1813.
Along with providing a granular approach towards security, it also provides administrative ease by providing centralized management through Cisco Secure ACS products. Cisco Secure ACS products combines AAA architecture with policy-based control to provide centralized access control management, increased network security with scalability, and flexibility with user productivity gain. Figure 2-1 shows a simple AAA scenario using ACS. Resource Access Request Response End Client RADIUS/ TACACS+ Access-Request Access-Accept/ Network Access-Reject Access Device, AAA Client ACS External User Identity Figure 2-1 Simple AAA Scenario Using ACS AAA Client-Server Framework AAA server is based on a framework that consists of two components: ■ AAA client ■ AAA server Cisco Secure ACS server plays the role of the server side (AAA server) in the AAA model by providing authentication, authorization, and accounting services to the network devices that compose the client end (AAA client) in the AAA model.