Cisco CISCO876-SEC-I-K9 Configuration Guide - Page 43

no shutdown, interface, ip nat, inside, outside, access-list, permit, Cisco IOS IP Command Reference

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Chapter 3 Configuring PPP over Ethernet with NAT Configure Network Address Translation Step 5 Command no shutdown Example: Router(config-if)# no shutdown Router(config-if)# Purpose Enables the configuration changes just made to the Ethernet interface. Step 6 exit Example: Router(config-if)# exit Router(config)# Exits configuration mode for the Fast Ethernet interface. Step 7 interface type number Example: Router(config)# interface fastethernet 4 Router(config-if)# Enters configuration mode for the Fast Ethernet WAN interface (FE4) to be the outside interface for NAT. Step 8 ip nat {inside | outside} Example: Router(config-if)# ip nat outside Router(config-if)# Step 9 no shutdown Example: Router(config-if)# no shutdown Router(config-if)# Identifies the specified WAN interface as the NAT outside interface. For details about this command and additional parameters that can be set, as well as information about enabling static translation, see the Cisco IOS IP Command Reference, Volume 1 of 4: Addressing and Services. Enables the configuration changes just made to the Ethernet interface. Step 10 exit Example: Router(config-if)# exit Router(config)# Exits configuration mode for the Fast Ethernet interface. Step 11 access-list access-list-number {deny | permit} source [source-wildcard] Example: Router(config)# access-list 1 permit 192.168.1.0 255.255.255.0 Defines a standard access list indicating which addresses need translation. Note All other addresses are implicitly denied. Note If you want to use NAT with a virtual-template interface, you must configure a loopback interface. See Chapter 1, "Basic Router Configuration," for information on configuring a loopback interface. OL-5332-01 Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide 3-7

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3-7
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
OL-5332-01
Chapter 3
Configuring PPP over Ethernet with NAT
Configure Network Address Translation
Note
If you want to use NAT with a virtual-template interface, you must configure a loopback interface. See
Chapter 1, “Basic Router Configuration,”
for information on configuring a loopback interface.
Step 5
no shutdown
Example:
Router(config-if)#
no shutdown
Router(config-if)#
Enables the configuration changes just made to the
Ethernet interface.
Step 6
exit
Example:
Router(config-if)#
exit
Router(config)#
Exits configuration mode for the Fast Ethernet
interface.
Step 7
interface
type number
Example:
Router(config)#
interface fastethernet
4
Router(config-if)#
Enters configuration mode for the Fast Ethernet
WAN interface (FE4) to be the outside interface
for NAT.
Step 8
ip nat
{
inside
|
outside
}
Example:
Router(config-if)#
ip nat outside
Router(config-if)#
Identifies the specified WAN interface as the NAT
outside interface.
For details about this command and additional
parameters that can be set, as well as information
about enabling static translation, see the
Cisco IOS IP Command Reference, Volume 1 of 4:
Addressing and Services
.
Step 9
no shutdown
Example:
Router(config-if)#
no shutdown
Router(config-if)#
Enables the configuration changes just made to the
Ethernet interface.
Step 10
exit
Example:
Router(config-if)#
exit
Router(config)#
Exits configuration mode for the Fast Ethernet
interface.
Step 11
access-list
access-list-number
{
deny
|
permit
}
source
[
source-wildcard
]
Example:
Router(config)#
access-list 1
permit
192.168.1.0 255.255.255.0
Defines a standard access list indicating which
addresses need translation.
Note
All other addresses are implicitly denied.
Command
Purpose