7.6.1.0 - Force10 Networks

FTOS can assign different access classes to different users by username. Until the user attempts to login,
FTOS does not know if they will be assigned a VTY line. This means that an incoming user always sees a
login prompt even if you have excluded them from the VTY line with a deny-all access class. Once the
user identifies themselves, FTOS retrieves the access class from the local database and applies it. (FTOS
also subsequently can close the connection if the user is denied access).
.
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
Figure 59 Example Access-Class Configuration Using Local Database
VTY Line Remote Authentication and Authorization
FTOS retrieves the access class from the VTY line.
The 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.
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)
Figure 60 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.
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