Configuration Example - Cisco 1812W - Integrated Services Router Wireless Configuration Manual

Chapter 4 Configuring PPP over ATM with NAT
Command
Step 7
interface type number
Example:
Router(config)#interface fastethernet 0
Router(config-if)#
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)#
Step 10 exit
Example:
Router(config-if)# exit
Router(config)#
Step 11
access-list access-list-number {deny | permit}
source [source-wildcard]
Example:
Router(config)# access-list 1 permit
192.168.1.0 0.0.0.255
If you want to use NAT with a virtual-template interface, you must configure a loopback interface. See
Note
Chapter 1, "Basic Router Configuration,"
For complete information on NAT commands, see the Cisco IOS Release 12.3 documentation set. For
more general information on NAT concepts, see

Configuration Example

The following configuration example shows a portion of the configuration file for a client in the PPPoA
scenario described in this chapter.
The VLAN interface has an IP address of 192.168.1.1 with a subnet mask of 255.255.255.0. NAT is
configured for inside and outside.
OL-6426-02
for information on configuring the loopback interface.
Appendix B, "Concepts."
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
Purpose
Enters configuration mode for the ATM WAN
interface (FE0 or FE1) to be the outside interface
for NAT.
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 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.
Exits configuration mode for the ATM interface.
Defines a standard access list permitting addresses
that need translation.
All other addresses are implicitly denied.
Note
Configuration Example
4-11