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HP PROCURVE 2910AL

HP PROCURVE 2910AL
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9
IPv4 Access Control Lists (ACLs)
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
What Is the Difference Between Network (or Subnet)
Rules for Defining a Match Between a Packet and an
Overview of Options for Applying IPv4 ACLs on the Switch . . . . . . 9-6
Static ACLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
Dynamic Port ACLs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
Types of IPv4 ACLs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
ACL Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
Static Port ACL and Dynamic Port ACL Applications . . . . . . . . . 9-15
Dynamic (RADIUS-assigned) Port ACL Applications . . . . . . . . . 9-15
Multiple ACLs on an Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-16
Features Common to All ACL Applications . . . . . . . . . . . . . . . . . . . . . 9-16
General Steps for Planning and Configuring ACLs . . . . . . . . . . . . . . . 9-18
IPv4 Static ACL Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-20
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-20
The Packet-filtering Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-20
Planning an ACL Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-24
IPv4 Traffic Management and Improved Network Performance . . . 9-24
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-25
Guidelines for Planning the Structure of a Static ACL . . . . . . . . . . . . 9-26
IPv4 ACL Configuration and Operating Rules . . . . . . . . . . . . . . . . . . . 9-27
How an ACE Uses a Mask To Screen Packets for Matches . . . . . . . . 9-28
Masks and the Masks Used with ACLs? . . . . . . . . . . . . . . . . . . . . 9-28
Access Control Entry (ACE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-29
9-1

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