Cisco Systems C819GUK9 Configure Network Address Translation, specific destination subnetwork

Chapter 11 Configuring PPP over Ethernet with NAT

Configuration Tasks

	Command	Purpose
Step 6
	dialer pool number	Specifies the dialer pool to use to connect to a
	Example:	specific destination subnetwork.
	Router(config-if)# dialer pool 1
	Router(config-if)#
Step 7
	dialer-group group-number	Assigns the dialer interface to a dialer group (1 to
	Example:	10).
		Tip	Using a dialer group controls access to
	Router(config-if)# dialer-group 1
			your router.
	Router(config-if)#
Step 8
	exit	Exits the dialer 0 interface configuration.
	Example:
	Router(config-if)# exit
	Router(config)#
Step 9
	dialer-list dialer-groupprotocol	Creates a dialer list and associates a dial group
	protocol-name{permit deny list	with it. Packets are then forwarded through the
	access-list-number access-group}	specified interface dialer group.
	Example:	For details about this command and additional
	Router(config)# dialer-list 1 protocol ip	parameters that can be set, see Cisco IOS Dial
		Technologies Command Reference.
	permit
	Router(config)#
Step 10
	ip route prefix mask {interface-type	Sets the IP route for the default gateway for the
	interface-number}	dialer 0 interface.
		For details about this command and additional
	Example:	parameters that can be set, see Cisco IOS IP
	Router(config)# ip route 10.10.25.2	Command Reference, Volume 2 of 3: Routing
		Protocols, Release 12.2 and Cisco IOS IP
	255.255.255.255 dialer 0
	Router(config)#	Command Reference, Volume 2 of 4: Routing
		Protocols, Release 12.3.

Configure Network Address Translation

Network Address Translation (NAT) translates packets from addresses that match a standard access list, using global addresses allocated by the dialer interface. Packets that enter the router through the inside interface, packets sourced from the router, or both are checked against the access list for possible address translation. You can configure NAT for either static or dynamic address translations.

Perform these steps to configure the outside Fast Ethernet WAN interface with dynamic NAT, beginning in global configuration mode:

	Cisco 819 Series Integrated Services Routers Software Configuration Guide
11-6	OL-23590-02