Cisco Systems 2960 Manual De Usuario
31-8
Catalyst 2960 and 2960-S Switch Software Configuration Guide
OL-8603-09
Chapter 31 Configuring Network Security with ACLs
Configuring IPv4 ACLs
Note
In addition to numbered standard and extended ACLs, you can also create standard and extended named
IP ACLs by using the supported numbers. That is, the name of a standard IP ACL can be 1 to 99; the
name of an extended IP ACL can be 100 to 199. The advantage of using named ACLs instead of
numbered lists is that you can delete individual entries from a named list.
IP ACLs by using the supported numbers. That is, the name of a standard IP ACL can be 1 to 99; the
name of an extended IP ACL can be 100 to 199. The advantage of using named ACLs instead of
numbered lists is that you can delete individual entries from a named list.
Creating a Numbered Standard ACL
Beginning in privileged EXEC mode, follow these steps to create a numbered standard ACL:
Use the no access-list access-list-number global configuration command to delete the entire ACL. You
cannot delete individual ACEs from numbered access lists.
cannot delete individual ACEs from numbered access lists.
1300–1999
IP standard access list (expanded range)
Yes
2000–2699
IP extended access list (expanded range)
Yes
Table 31-1
Access List Numbers (continued)
Access List Number
Type
Supported
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
access-list access-list-number {deny | permit}
source [source-wildcard]
source [source-wildcard]
Define a standard IPv4 access list by using a source address and
wildcard.
wildcard.
The access-list-number is a decimal number from 1 to 99 or 1300
to 1999.
to 1999.
Enter deny or permit to specify whether to deny or permit access
if conditions are matched.
if conditions are matched.
The source is the source address of the network or host from which
the packet is being sent specified as:
the packet is being sent specified as:
•
The 32-bit quantity in dotted-decimal format.
•
The keyword any as an abbreviation for source and
source-wildcard of 0.0.0.0 255.255.255.255. You do not need
to enter a source-wildcard.
source-wildcard of 0.0.0.0 255.255.255.255. You do not need
to enter a source-wildcard.
•
The keyword host as an abbreviation for source and
source-wildcard of source 0.0.0.0.
source-wildcard of source 0.0.0.0.
(Optional) The source-wildcard applies wildcard bits to the
source.
source.
Step 3
end
Return to privileged EXEC mode.
Step 4
show access-lists [number | name]
Show the access list configuration.
Step 5
copy running-config startup-config
(Optional) Save your entries in the configuration file.