Acl Operation; Introduction - HP ProCurve 6120G/XG Manual

ACL Operation

Introduction

An ACL is a list of one or more Access Control Entries (ACEs), where each
ACE consists of a matching criteria and an action (permit or deny). An ACL
applies only to the switch in which it is configured. ACLs operate on assigned
ports and static trunks, and filter these traffic types:
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You can apply one inbound ACL to each port and static trunk configured on
the switch. The complete range of options includes:
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Note
On a given port or trunk, after you assign an ACL, the default action is to deny
any traffic that is not specifically permitted by the ACL. (This applies only to
the inbound traffic flow filtered by the ACL.)
Traffic entering the switch. (Note that ACLs do not screen traffic at
any internal point.where traffic moves between VLANs or subnets
within the switch; only on inbound ports and static trunks. Refer to
"ACL Inbound Application Points" on page 9-10.)
Switched or routed traffic entering the switch and having an IP
address on the switch as the destination
No ACL assigned. (In this case, all traffic entering the switch on the
interface does so without any ACL filtering, which is the default.)
One ACL assigned to filter the inbound traffic entering the switch on
the interface.
Multiple Assignments for the same ACL. (The switch allows one
ACL assignment to an interface, but you can assign the same ACL to
multiple interfaces.)
IPv4 Access Control Lists (ACLs)

ACL Operation

9-13