34-16
Catalyst 3750 SwitchSoftware Configuration Guide
OL-8550-09
Chapter34 Configuring Network Security with ACLs
Configuring IPv4 ACLs
Beginning in privileged EXEC mode, follow these steps to create a standard ACL using names:
To remove a named standard ACL, use the no ip access-list standard name global configuration
command.
Beginning in privileged EXEC mode, follow these steps to create an extended ACL using names:
To remove a named extended ACL, use the no ip access-list extended name global configuration
command.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 ip access-list standard name Define a standard IPv4 access list using a name, and enter
access-list configuration mode.
The name can be a number from 1 to 99.
Step3 deny {source [source-wildcard] | host source |
any} [log]
or
permit {source [source-wildcard] | host source
| any} [log]
In access-list configuration mode, specify one or more conditions
denied or permitted to decide if the packet is forwarded or dropped.
host source—A source and source wildcard of source 0.0.0.0.
any—A source and source wildcard of 0.0.0.0
255.255.255.255.
Step4 end Return to privileged EXEC mode.
Step5 show access-lists [number | name] Show the access list configuration.
Step6 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 ip access-list extended name Define an extended IPv4 access list using a name, and enter
access-list configuration mode.
The name can be a number from 100 to 199.
Step3 {deny | permit} protocol {source
[source-wildcard] | host source | any}
{destination [destination-wildcard] | host
destination | any} [precedence precedence]
[tos tos] [established] [log] [time-range
time-range-name]
In access-list configuration mode, specify the conditions allowed
or denied. Use the log keyword to get access list logging messages,
including violations.
See the “Creating a Numbered Extended ACL” section on
page 34-11 for definitions of protocols and other keywords.
host source—A source and source wildcard of source 0.0.0.0.
host destination—A destination and destination wildcard of
destination 0.0.0.0.
any—A source and source wildcard or destination and
destination wildcard of 0.0.0.0 255.255.255.255.
Step4 end Return to privileged EXEC mode.
Step5 show access-lists [number | name] Show the access list configuration.
Step6 copy running-config startup-config (Optional) Save your entries in the configuration file.