Configuration manual

Security | 965
Figure 46-16. Example Access-Class Configuration Using Local Database
VTY Line Remote Authentication and Authorization
FTOS retrieves the access class from the VTY line.
The Dell Force10 OS takes the access class from the VTY line and applies it to ALL users. FTOS 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 configured an access class for the VTY
line, FTOS immediately applies it. If the access-class is
deny all or deny for the incoming subnet, FTOS
closes the connection without displaying the login prompt. Figure 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.
Figure 46-17. Example Access Class Configuration Using TACACS+ Without Prompt
VTY MAC-SA Filter Support
FTOS 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 (Figure 46-18).
Figure 46-18 shows how to deny incoming connections from subnet 10.0.0.0 without displaying a login
prompt..
Note: See also the section Chapter 8, IP Access Control Lists (ACL), Prefix Lists, and Route-maps.
Force10(conf)#user gooduser password abc privilege 10 access-class permitall
Force10(conf)#user baduser password abc privilege 10 access-class denyall
Force10(conf)#
Force10(conf)#aaa authentication login localmethod local
Force10(conf)#
Force10(conf)#line vty 0 9
Force10(config-line-vty)#login authentication localmethod
Force10(config-line-vty)#end
Force10(conf)#ip access-list standard deny10
Force10(conf-ext-nacl)#permit 10.0.0.0/8
Force10(conf-ext-nacl)#deny any
Force10(conf)#
Force10(conf)#aaa authentication login tacacsmethod tacacs+
Force10(conf)#tacacs-server host 256.1.1.2 key force10
Force10(conf)#
Force10(conf)#line vty 0 9
Force10(config-line-vty)#login authentication tacacsmethod
Force10(config-line-vty)#
Force10(config-line-vty)#access-class deny10
Force10(config-line-vty)#end
(same applies for radius and line authentication)