Cisco OL-4015-08 Guía de usuario descargar pdf (Pagina 403)

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Cisco Router and Security Device Manager Version 2.2 User’s Guide

OL-4015-08

Chapter 18 Network Address Translation

Network Address Translation Rules

Note If you create a NAT rule that would translate addresses of devices that are part of

a VPN, SDM will prompt you to allow it to create a route map that protects those

addresses from being translated by NAT. If NAT is allowed to translate addresses

of devices on a VPN, their translated addresses will not match the IPSec rule used

in the IPSec policy, and traffic will be sent unencrypted. You can view route maps

created by SDM or created using the CLI by clicking the View Route Maps button

in the NAT window.

Direction

Select the traffic direction that this rule applies to.

From outside to inside

Select this option if you want to translate incoming addresses to addresses that

will be valid on your LAN. One situation in which you may want to do this is

when you are merging networks and must make one set of incoming addresses

compatible with an existing set on the LAN the router serves.

This help topic describes how the remaining fields are used when From outside to

inside is chosen.

Translate from Interface

This area shows the interfaces from which packets needing address translation

may arrive. It provides fields for you to specify the IP address of a single host, or

a network address and subnet mask that represent the hosts on a network.

Outside Interfaces

If you choose From outside to inside, this area contains the designated outside

interfaces.

Note If this area contains no interface names, close the Add Address Translation Rule

window, click Designate NAT interfaces in the NAT window, and designate the

router interfaces as inside or outside. Then return to this window and configure

the NAT rule.

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