Cisco ASA 5505 - Manual (Page 684)

35-4
Cisco ASA 5500 Series Configuration Guide using the CLI
Chapter 35 Configuring AAA Servers and the Local Database
Information About AAA
RADIUS Server Support
The ASA supports the following RFC-compliant RADIUS servers for AAA:
• Cisco Secure ACS 3.2, 4.0, 4.1, 4.2, and 5.x
• Cisco Identity Services Engine (ISE)
• RSA RADIUS in RSA Authentication Manager 5.2, 6.1, and 7.x
• Microsoft
Authentication Methods
The ASA supports the following authentication methods with RADIUS:
• PAP—For all connection types.
• CHAP and MS-CHAPv1—For L2TP-over-IPsec connections.
• MS-CHAPv2—For L2TP-over-IPsec connections, and for regular IPsec remote access connections
when the password management feature is enabled. You can also use MS-CHAPv2 with clientless
connections.
• Authentication Proxy modes—Including RADIUS to Active Directory, RADIUS to RSA/SDI,
RADIUS to Token-server, and RSA/SDI to RADIUS connections,
Note To enable MS-CHAPv2 as the protocol used between the ASA and the RADIUS server for a VPN
connection, password management must be enabled in the tunnel group general attributes. Enabling
password management generates an MS-CHAPv2 authentication request from the ASA to the RADIUS
server. See the description of the password-management command for details.
If you use double authentication and enable password management in the tunnel group, then the primary
and secondary authentication requests include MS-CHAPv2 request attributes. If a RADIUS server does
not support MS-CHAPv2, then you can configure that server to send a non-MS-CHAPv2 authentication
request by using the no mschapv2-capable command.
Attribute Support
The ASA supports the following sets of RADIUS attributes:
• Authentication attributes defined in RFC 2138.
• Accounting attributes defined in RFC 2139.
• RADIUS attributes for tunneled protocol support, defined in RFC 2868.
• Cisco IOS Vendor-Specific Attributes (VSAs), identified by RADIUS vendor ID 9.
• Cisco VPN-related VSAs, identified by RADIUS vendor ID 3076.
• Microsoft VSAs, defined in RFC 2548.
• Cisco VSA (Cisco-Priv-Level), which provides a standard 0-15 numeric ranking of privileges, with
1 being the lowest level and 15 being the highest level. A zero level indicates no privileges. The first
level (login) allows privileged EXEC access for the commands available at this level. The second
level (enable) allows CLI configuration privileges.