Administrator Guide

Dell(config-line-vty)#login authentication localmethod
Dell(config-line-vty)#end
VTY Line Remote Authentication and Authorization
The Dell Newtorking OS retrieves the access class from the VTY line.
The Dell Networking OS takes the access class from the VTY line and applies it to ALL users. The system does not need to know the
identity of the incoming user and can immediately apply the access class. If the authentication method is RADIUS, TACACS+, or line,
and you have congured an access class for the VTY line, the system immediately applies it. If the access-class is set to deny all or
deny for the incoming subnet, the system closes the connection without displaying the login prompt. The following example shows
how to deny incoming connections from subnet 10.0.0.0 without displaying a login prompt. The example uses TACACS+ as the
authentication mechanism.
Example of Conguring VTY Authorization Based on Access Class Retrieved from the Line (Per Network Address)
Dell(conf)#ip access-list standard deny10
Dell(conf-ext-nacl)#permit 10.0.0.0/8
Dell(conf-ext-nacl)#deny any
Dell(conf)#
Dell(conf)#aaa authentication login tacacsmethod tacacs+
Dell(conf)#tacacs-server host 256.1.1.2 key Force10
Dell(conf)#
Dell(conf)#line vty 0 9
Dell(config-line-vty)#login authentication tacacsmethod
Dell(config-line-vty)#
Dell(config-line-vty)#access-class deny10
Dell(config-line-vty)#end
(same applies for radius and line authentication)
VTY MAC-SA Filter Support
The Dell Newtorking OS supports MAC access lists which permit or deny users based on their source MAC address.
With this approach, you can implement a security policy based on the source MAC address.
To apply a MAC ACL on a VTY line, use the same access-class command as IP ACLs.
The following example shows how to deny incoming connections from subnet 10.0.0.0 without displaying a login prompt.
Example of Conguring VTY Authorization Based on MAC ACL for the Line (Per MAC Address)
Dell(conf)#mac access-list standard sourcemac
Dell(config-std-mac)#permit 00:00:5e:00:01:01
Dell(config-std-mac)#deny any
Dell(conf)#
Dell(conf)#line vty 0 9
Dell(config-line-vty)#access-class sourcemac
Dell(config-line-vty)#end
Role-Based Access Control
With Role-Based Access Control (RBAC), access and authorization is controlled based on a user’s role. Users are granted
permissions based on their user roles, not on their individual user ID. User roles are created for job functions and through those roles
they acquire the permissions to perform their associated job function.
This chapter consists of the following sections:
• Overview
• Privilege-or-Role Mode Versus Role-only Mode
• Conguring Role-based Only AAA Authorization
• System-Dened RBAC User Roles
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Security