By Vivek Santuka
Cisco's entire, authoritative consultant to Authentication, Authorization, and Accounting (AAA) options with CiscoSecure ACS
This is the 1st whole, authoritative, single-source advisor to imposing, configuring, and dealing with Authentication, Authorization and Accounting (AAA) identification administration with CiscoSecure entry keep watch over Server (ACS) four and five. Written by way of 3 of Cisco's such a lot skilled CiscoSecure product aid specialists, it covers all AAA recommendations (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 specializes in particular Cisco units and their AAA configuration with ACS. each one bankruptcy covers configuration syntax and examples, debug outputs with factors, and ACS screenshots. Drawing at the authors' event with numerous thousand help situations in organisations of every kind, AAA identification administration Security offers pitfalls, warnings, and guidance all through. each one significant subject concludes with a pragmatic, hands-on lab situation similar to a real-life answer that has been extensively carried out by means of Cisco consumers. This e-book brings jointly an important info that used to be formerly scattered throughout a number of resources. will probably be fundamental to each specialist operating 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 info for AAA Identity Management Security
The legal packet types are as follows: TAC_PLUS_AUTHEN=0x01—This is the packet type that signifies authentication. TAC_PLUS_AUTHOR-0x02—This is the packet type that signifies authorization. TAC_PLUS_ACCT=0x03—This is the packet type that signifies accounting. Note The significance of these possible message types is that TACACS+ has the capability to perform authentication, authorization, and accounting as separate functions. RADIUS does not have this capability. ■ Seq_no: This determines the sequence number for the current session.
RADIUS supports authentication via Point-to-Point Protocol Challenge Handshake Authentication Protocol (PPP CHAP) and PPP Password Authentication Protocol (PAP), as well as others. In addition to these features, RADIUS is an extensible protocol that provides vendors with the capability to add new attribute values without creating a problem for existing attribute values. A major difference between TACACS+ and RADIUS is that RADIUS does not separate authentication and authorization. RADIUS also provides for better accounting.
TACACS+ uses TCP port 49 and creates a session to facilitate the messaging in an AAA exchange. Many benefits exist in using TCP for session control in TACACS+. Among these benefits is the fact that TACACS+ uses TCP to provide an acknowledgment of requests made by a NAS or an AAA client. In addition to the acknowledgments provided within TCP, TACACS+ also has the capability, through inherent functionality of TCP, to adapt to congestion and bandwidth. An example of this functionality is the utilization of TCP windowing.
AAA Identity Management Security by Vivek Santuka