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Dell Configuration Guide for the S4048–ON System 9.14.2.6

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Configure 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 ACL, use the ip access-group command in EXEC Privilege mode. The example shows applying the ACL, rules to the newly created access group, and viewing the access list.

Example of Applying ACL Rules to Ingress Traffic and Viewing ACL Configuration

To specify ingress, use the in keyword. Begin applying rules to the ACL with the ip access-list extended abcd command. To view the access-list, use the show command.

DellEMC(conf)#interface tengigabitethernet 1/1
DellEMC(conf-if-te1/1)#ip access-group abcd in
DellEMC(conf-if-te1/1)#show config
!
tengigabitethernet 1/1
  no ip address
  ip access-group abcd in
  no shutdown
DellEMC(conf-if-te1/1)#end
DellEMC#configure terminal
DellEMC(conf)#ip access-list extended abcd
DellEMC(config-ext-nacl)#permit tcp any any
DellEMC(config-ext-nacl)#deny icmp any any
DellEMC(config-ext-nacl)#permit 1.1.1.2
DellEMC(config-ext-nacl)#end
DellEMC#show ip accounting access-list
!
Extended Ingress IP access list abcd on tengigabitethernet 1/1
  seq 5 permit tcp any any
  seq 10 deny icmp any any
seq 15 permit 1.1.1.2

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