Inbound or outbound?

[Rocha]

Hi,

I never know when to apply an inbound or outbound ACL to an interface!
I still get confused with that even after finishing chapter 10!
Could anyone try to explain that to me in a easier way??

Thanks,

Rocha

[HermeszData]

Hi,

I never know when to apply an inbound or outbound ACL to an interface!
I still get confused with that even after finishing chapter 10!
Could anyone try to explain that to me in a easier way??

Thanks,

Rocha

It really is simple. Regardless of whether you are dealing with a LAN interface or a WAN interface, The ACLs are used to allow or block select traffic on our networks.

So, if you need to allow/block certain traffic types coming into an interface you need to apply the "IN" modifier. conversely, if you want to prevent certain traffic from going out an interface you use the "OUT" modifier.

When you understand what any given line in an ACL does, you can better understand how to apply the ACL to an interface.

Hope this helps!