Enterasys Networks 9034313-07 manual Overview of Authentication and Authorization Methods

Overview of Authentication and Authorization Methods

TACACS+ application. When RADIUS or TACACS+ is enabled, this essentially overrides login user accounts. When HACA is active per a valid RADIUS or TACACS+ configuration, the user names and passwords used to access the switch via Telnet, SSH, WebView, and COM ports will be validated against the configured RADIUS server. Only in the case of a RADIUS timeout will those credentials be compared against credentials locally configured on the switch. For details, refer to “Configuring RADIUS” on page 26‐6.

•SNMP user or community names – allows access to the SecureStack C3 switch via a network SNMP management application. To access the switch, you must enter an SNMP user or community name string. The level of management access is dependent on the associated access policy. For details, refer to Chapter 8.

•802.1X Port Based Network Access Control using EAPOL (Extensible Authentication Protocol)

– provides a mechanism via a RADIUS server for administrators to securely authenticate and grant appropriate access to end user devices communicating with SecureStack C3 ports. For details on using CLI commands to configure 802.1X, refer to “Configuring 802.1X Authentication” on page 26‐15.

Note: To configure EAP pass-through, which allows client authentication packets to be forwarded through the switch to an upstream device, 802.1X authentication must be globally disabled with the set dot1x command.

•MAC Authentication – provides a mechanism for administrators to securely authenticate source MAC addresses and grant appropriate access to end user devices communicating with SecureStack C3 ports. For details, refer to “Configuring MAC Authentication” on page 26‐25.

•Multiple Authentication Methods – allows users to authenticate using multiple methods of authentication on the same port. For details, refer to “Configuring Multiple Authentication Methods” on page 26‐37.

•Multi‐User Authentication —allows multiple users and devices on the same port to authenticate using any supported authentication method. Each user or device can be mapped to the same or different roles using Enterasys policy for access control, VLAN authorization, traffic rate limiting, and quality of service. This is the most flexible and preferred method to use for VoIP (PC daisy chained to a phone). For details, refer to “About Multi‐User Authentication” on page 26‐37. Refer to Appendix A, Policy and Authentication Capacities, for a listing of the number of users per port supported by the SecureStack C3.

•User + IP Phone (Legacy feature) — The User + IP Phone authentication feature provides legacy support for authentication and authorization of two devices, specifically a PC cascaded with a VLAN‐tagging IP phone, on a single port on the switch. The IP phone must authenticate using MAC or 802.1X authentication, but the user may authenticate by any method. This feature allows both the user’s PC and IP phone to simultaneously authenticate on a single port and each receive a unique level of network access. For details, refer to “Configuring User + IP Phone Authentication” on page 26‐48.

Note: User + IP Phone authentication is a legacy feature that should only be used if you have already implemented User + IP Phone in your network with switches that do not support true multi-user authentication.

•RFC 3580 tunnel attributes provide a mechanism to contain an 802.1X, MAC, or PWA authenticated user to a VLAN regardless of the PVID. This feature dynamically assigns a VLAN based on the RFC 3580 tunnel attributes returned in the RADIUS accept message. Refer to “Configuring VLAN Authorization (RFC 3580)” on page 26‐49.

•Configuring Policy Maptable Response — allows you to define how the system should handle allowing an authenticated user onto a port based on the contents of the RADIUS server Access‐Accept reply. There are three possible response settings: tunnel mode, policy mode, or

26-2 Authentication and Authorization Configuration