Name: Cisco RV082 - Small Business VPN Router
Brand: Cisco
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Cisco Small Business RV0xx Series Routers Administration Guide 183

IPSec NAT Traversal

Overview

Network Address Translation (NAT) traversal is a technique developed so that

data protected by IPSec can pass through a NAT. Since IPSec provides integrity

for the entire IP datagram, any changes to the IP addressing will invalidate the

data. To resolve this issue, NAT traversal appends a new IP and UDP header to the

incoming datagram, ensuring that no changes are made to the incoming datagram

stream.

In the following scenario, Router A initiates IKE negotiation, while Router B is the

responder.

RV016

RV042 RV016

RV042

199787

WAN: 192.168.11.101

Router A - Initiator

LAN: 192.168.1.0/24

WAN: 192.168.111.101

NAT 1

LAN: 192.168.11.1

WAN: 192.168.99.11

NAT 2

LAN: 192.168.111.1

WAN: 192.168.99.22

Router B - Responder

LAN: 192.168.2.0/24

192.168.1.101

192.168.2.100

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Cisco RV082 - Small Business VPN Router Specifications

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