Configuring Ingress Acls; Configuring Egress Acls - Dell Force10 S4810P Configuration Manual

Configuring Ingress ACLs

Ingress ACLs are applied to interfaces and to traffic entering the system.These system-wide ACLs
eliminate the need to apply ACLs onto each interface and achieves the same results. By localizing target
traffic, it is a simpler implementation.
To create an ingress ACLs, use the
below. This example also shows applying the ACL, applying rules to the newly created access group, and
viewing the access list:
FTOS(conf)#interface gige 0/0
FTOS(conf-if-gige0/0)#ip access-group abcd
FTOS(conf-if-gige0/0)#show config
!
gigethernet 0/0
no ip address
ip access-group abcd in
no shutdown
FTOS(conf-if-gige0/0)#end
FTOS#configure terminal
FTOS(conf)#ip access-list extended
FTOS(config-ext-nacl)#permit tcp any any
FTOS(config-ext-nacl)#deny icmp any any
FTOS(config-ext-nacl)#permit 1.1.1.2
FTOS(config-ext-nacl)#end
FTOS#show ip accounting access-list
!
Extended Ingress IP access list abcd on gigethernet 0/0
seq 5 permit tcp any any
seq 10 deny icmp any any
seq 15 permit 1.1.1.2

Configuring Egress ACLs

Egress ACLs are supported on platforms
Egress ACLs are applied to line cards and affect the traffic leaving the system. Configuring egress ACLs
onto physical interfaces protects the system infrastructure from attack—malicious and incidental—by
explicitly allowing only authorized traffic.These system-wide ACLs eliminate the need to apply ACLs
onto each interface and achieves the same results. By localizing target traffic, it is a simpler
implementation.
An egress ACL is used when users would like to restrict egress traffic. For example, when a DOS attack
traffic is isolated to one particular interface, you can apply an egress ACL to block that particular flow
from exiting the box, thereby protecting downstream devices.
command in the EXEC Privilege mode as shown
ip access-group
in
abcd
e
and
Access Control Lists (ACLs) | 119