Dell Force10 S50-01-GE-48T FTOS 8.4.2.7 Configuration Guide for E-Series TeraS - Page 949

Figure 45-16. Example Access-Class Configuration Using Local Database FTOS(conf)#user gooduser password abc privilege 10 access-class permitall FTOS(conf)#user baduser password abc privilege 10 access-class denyall FTOS(conf)# FTOS(conf)#aaa authentication login localmethod local FTOS(conf)# FTOS(conf)#line vty 0 9 FTOS(config-line-vty)#login authentication localmethod FTOS(config-line-vty)#end Note: See also the section Chapter 8, IP Access Control Lists (ACL), Prefix Lists, and Route-maps. 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 45-17. Example Access Class Configuration Using TACACS+ Without Prompt FTOS(conf)#ip access-list standard deny10 FTOS(conf-ext-nacl)#permit 10.0.0.0/8 FTOS(conf-ext-nacl)#deny any FTOS(conf)# FTOS(conf)#aaa authentication login tacacsmethod tacacs+ FTOS(conf)#tacacs-server host 256.1.1.2 key force10 FTOS(conf)# FTOS(conf)#line vty 0 9 FTOS(config-line-vty)#login authentication tacacsmethod FTOS(config-line-vty)# FTOS(config-line-vty)#access-class deny10 FTOS(config-line-vty)#end (same applies for radius and line authentication) 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 45-18). Figure 45-18 shows how to deny incoming connections from subnet 10.0.0.0 without displaying a login prompt.. Security | 949