Cisco Systems 520 series manual Configure Network Address Translation, Dialer pool number

Chapter 3 Configuring PPP over Ethernet with NAT

Configure Network Address Translation

	Command	Purpose
Step 5
	ppp authentication {protocol1 [protocol2...]}	Sets the PPP authentication method to Challenge
		Handshake Authentication Protocol (CHAP).
	Example:	For details about this command and additional
	Router(config-if)#ppp authentication chap	parameters that can be set, see the Cisco IOS
	Router(config-if)#	Security Command Reference.
Step 6
	dialer pool number	Specifies the dialer pool to use to connect to a
		specific destination subnetwork.
	Example:
	Router(config-if)# dialer pool 1
	Router(config-if)#
Step 7
	dialer-group group-number	Assigns the dialer interface to a dialer group
		(1–10).
	Example:	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-listdialer-group protocol protocol-name	Creates a dialer list and associates a dial group
	{permit deny list access-list-number	with it. Packets are then forwarded through the
	access-group}	specified interface dialer group.
	Example:	For details about this command and additional
		parameters that can be set, see the Cisco IOS Dial
	Router(config)# dialer-list 1 protocol ip	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.
	Example:	For details about this command and additional
		parameters that can be set, see the Cisco IOS IP
	Router(config)# ip route 10.10.25.2	Command Reference, Volume 2; Routing
	255.255.255.255 dialer 0	Protocols.
	Router(config)#

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.

Cisco Secure Router 520 Series Software Configuration Guide

OL-14210-01 3-5