C H A P T E R
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Cisco ASA Series CLI Configuration Guide
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Information About Access Lists
Cisco ASAs provide basic traffic filtering capabilities with access lists, which control access in your
network by preventing certain traffic from entering or exiting. This chapter describes access lists and
shows how to add them to your network configuration.
Access lists are made up of one or more access control entries (ACEs). An ACE is a single entry in an
access list that specifies a permit or deny rule (to forward or drop the packet) and is applied to a protocol,
to a source and destination IP address or network, and, optionally, to the source and destination ports.
Access lists can be configured for all routed and network protocols (IP, AppleTalk, and so on) to filter
the packets of those protocols as the packets pass through a router.
Access lists are used in a variety of features. If your feature uses Modular Policy Framework, you can
use an access list to identify traffic within a traffic class map. For more information on Modular Policy
Framework, see
Chapter 1, “Configuring a Service Policy Using the Modular Policy Framework.”
This chapter includes the following sections:
•
•
Access Control Entry Order, page 1-2
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Access Control Implicit Deny, page 1-3
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IP Addresses Used for Access Lists When You Use NAT, page 1-3
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Access List Types
The ASA uses five types of access control lists:
•
Standard access lists—Identify the destination IP addresses of OSPF routes and can be used in a
route map for OSPF redistribution. Standard access lists cannot be applied to interfaces to control
traffic. For more information, see
Chapter 1, “Adding a Standard Access Control List.”
•
Extended access lists—Use one or more access control entries (ACE) in which you can specify the
line number to insert the ACE, the source and destination addresses, and, depending upon the ACE
type, the protocol, the ports (for TCP or UDP), or the IPCMP type (for ICMP). For more
information, see
Chapter 1, “Adding an Extended Access Control List.”
•
EtherType access lists—Use one or more ACEs that specify an EtherType. For more information,
see
Chapter 1, “Adding an EtherType Access List.”
•
Webtype access lists—Used in a configuration that supports filtering for clientless SSL VPN. For
more information, see
Summary of Contents for 5505 - ASA Firewall Edition Bundle
Page 28: ...Glossary GL 24 Cisco ASA Series CLI Configuration Guide ...
Page 61: ...P A R T 1 Getting Started with the ASA ...
Page 62: ......
Page 219: ...P A R T 2 Configuring High Availability and Scalability ...
Page 220: ......
Page 403: ...P A R T 2 Configuring Interfaces ...
Page 404: ......
Page 499: ...P A R T 2 Configuring Basic Settings ...
Page 500: ......
Page 533: ...P A R T 2 Configuring Objects and Access Lists ...
Page 534: ......
Page 601: ...P A R T 2 Configuring IP Routing ...
Page 602: ......
Page 745: ...P A R T 2 Configuring Network Address Translation ...
Page 746: ......
Page 845: ...P A R T 2 Configuring AAA Servers and the Local Database ...
Page 846: ......
Page 981: ...P A R T 2 Configuring Access Control ...
Page 982: ......
Page 1061: ...P A R T 2 Configuring Service Policies Using the Modular Policy Framework ...
Page 1062: ......
Page 1093: ...P A R T 2 Configuring Application Inspection ...
Page 1094: ......
Page 1191: ...P A R T 2 Configuring Unified Communications ...
Page 1192: ......
Page 1333: ...P A R T 2 Configuring Connection Settings and QoS ...
Page 1334: ......
Page 1379: ...P A R T 2 Configuring Advanced Network Protection ...
Page 1380: ......
Page 1475: ...P A R T 2 Configuring Modules ...
Page 1476: ......
Page 1549: ...P A R T 2 Configuring VPN ...
Page 1550: ......
Page 1965: ...P A R T 2 Configuring Logging SNMP and Smart Call Home ...
Page 1966: ......
Page 2059: ...P A R T 2 System Administration ...
Page 2060: ......
Page 2098: ...1 8 Cisco ASA Series CLI Configuration Guide Chapter 1 Troubleshooting Viewing the Coredump ...
Page 2099: ...P A R T 2 Reference ...
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