Users Guide

Authentication Method VTY access-class
support?
Username access-class
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Remote authorization
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RADIUS YES NO YES (with Dell
Networking OS version
6.1.1.0 and later)
Dell Networking OS provides several ways to configure access classes for VTY lines, including:
• VTY Line Local Authentication and Authorization
• VTY Line Remote Authentication and Authorization
VTY Line Local Authentication and
Authorization
Dell Networking OS retrieves the access class from the local database.
To use this feature:
1 Create a username.
2 Enter a password.
3 Assign an access class.
4 Enter a privilege level.
You can assign line authentication on a per-VTY basis; it is a simple password authentication, using an
access-class as authorization.
Configure local authentication globally and configure access classes on a per-user basis.
Dell Networking OS can assign different access classes to different users by username. Until users attempt to
log in, Dell Networking OS does not know if they will be assigned a VTY line. This means that incoming users
always see a login prompt even if you have excluded them from the VTY line with a deny-all access class.
After users identify themselves, Dell Networking OS retrieves the access class from the local database and
applies it. (Dell Networking OS then can close the connection if a user is denied access.)
NOTE: If a VTY user logs in with RADIUS authentication, the privilege level is applied from the RADIUS
server only if you configure RADIUS authentication.
The following example shows how to allow or deny a Telnet connection to a user. Users see a login prompt
even if they cannot log in. No access class is configured for the VTY line. It defaults from the local database.
For more information, refer to Access Control Lists (ACLs).
Example of Configuring VTY Authorization Based on Access Class Retrieved from a Local Database (Per
User)
Dell(conf)#user gooduser password abc privilege 10 access-class permitall
Dell(conf)#user baduser password abc privilege 10 access-class denyall
Dell(conf)#
Dell(conf)#aaa authentication login localmethod local
Dell(conf)#
Dell(conf)#line vty 0 9
Dell(config-line-vty)#login authentication localmethod
Dell(config-line-vty)#end
Security 952