Les ACLs Cisco
interface Ethernet0 ip address 172.16.1.1 255.255.255.0 ip access-group 1 out interface Ethernet1 ip address 172.16.2.1 255.255.255.0 ip access-group 2 in access-list 1 remark Stoppe tous les paquets d'IP source 172.16.3.10 access-list 1 deny host 172.16.3.10 access-list 1 permit any access-list 2 remark Autorise que les trames d'IP source 172.16.3.0/24 access-list 2 permit 172.16.3.0 0.0.0.255