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Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

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VTY Line Local Authentication and Authorization

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.

can assign different access classes to different users by username. Until users attempt to log in, 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, retrieves the access class from the local database and applies it. ( 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.

Example of Configuring VTY Authorization Based on Access Class Retrieved from a Local Database (Per User)

DellEMC(conf)#user gooduser password abc privilege 10 access-class permitall
DellEMC(conf)#user baduser password abc privilege 10 access-class denyall
DellEMC(conf)#
DellEMC(conf)#aaa authentication login localmethod local
DellEMC(conf)#
DellEMC(conf)#line vty 0 9
DellEMC(config-line-vty)#login authentication localmethod
DellEMC(config-line-vty)#end

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