Cisco Systems OL-6426-02 manual Ip nat inside outside, Access-list access-list-number deny permit

Chapter 3 Configuring PPP over Ethernet with NAT

Configure Network Address Translation

	Command		Purpose
Step 5
	no shutdown		Enables the configuration changes just made to the
			Ethernet interface.
	Example:
	Router(config-if)# no shutdown
	Router(config-if)#
Step 6
	exit		Exits configuration mode for the Fast Ethernet
			interface.
	Example:
	Router(config-if)# exit
	Router(config)#
Step 7
	interface type number		Enters configuration mode for the Fast Ethernet
			WAN interface (FE0 or FE1) to be the outside
	Example:		interface for NAT.
	Router(config)#interface fastethernet 0
	Router(config-if)#
Step 8
	ip nat {inside outside}		Identifies the specified WAN interface as the NAT
			outside interface.
	Example:		For details about this command and additional
	Router(config-if)# ip nat outside		parameters that can be set, as well as information
	Router(config-if)#		about enabling static translation, see the
			Cisco IOS IP Command Reference, Volume 1 of 4:
			Addressing and Services.
Step 9
	no shutdown		Enables the configuration changes just made to the
			Ethernet interface.
	Example:
	Router(config-if)# no shutdown
	Router(config-if)#
Step 10
	exit		Exits configuration mode for the Fast Ethernet
			interface.
	Example:
	Router(config-if)# exit
	Router(config)#
Step 11
	access-list access-list-number{deny permit}		Defines a standard access list indicating which
	source [source-wildcard]		addresses need translation.
	Example:		Note All other addresses are implicitly denied.
	Router(config)# access-list 1 permit
	192.168.1.0	0.0.0.255

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.

Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide

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