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Cisco IOS in a Nutshell, 2nd Edition by James Boney

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Name

access-list — global

Synopsis

Standard:

access-list number {permit | deny} src-address-spec

Extended:

access-list number {permit | deny} protocol src-address-spec [operator port]
     dest-address-spec [operator port] [established] [precedence value]
     [tos value] [log]

Named:

ip access-list {standard | extended} name

All access list types:

no access-list number

Configures

An access list

Default

None

Description

Access lists are an extremely general method for controlling access to the router, the traffic flowing in and out of the router, and even the routes accepted by the router. This command defines an entry in an access list.

number

A number that identifies the list and list type. Table 17-1 shows the ranges assigned to each list type. This book covers only standard and extended IP access lists, plus named and reflexive access lists.

Table 17-1. Access list numbers

List type

Numeric range

Standard IP access lists

1-99

Extended IP access lists

100-199

Ethernet type code

200-299

DECnet

300-399

XNS

400-499

Extended XNS

500-599

AppleTalk

600-699

Ethernet address

700-799

Novell

800-899

Extended Novell

900-999

Novell SAP

1000-1099

Additional standard IP access lists

1300-1999

Additional extended IP access lists

2000-2699

Named access lists

None

Reflexive access lists

None

permit|deny

Specifies if the line is to permit or deny matched traffic.

protocol

Specifies the protocol to which the access list entry applies. For IP access lists, this option can be ip, tcp, udp

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