Cisco RV042G Administration Guide

E
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

Cisco RV042G Specifications

General

Ethernet LAN	Yes
Cabling technology	10/100/1000Base-T(X)
Networking standards	IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3az, IEEE 802.3u
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet interface type	Gigabit Ethernet
Ethernet LAN (RJ-45) ports	6
Routing protocols	IP, RIP-1, RIP-2
Supported network protocols	PPTP, L2TP, IPSec, PPPoE, DHCP
VPN support	PPTP, Layer 2 Tunneling Protocol (L2TP), IPsec, Dead peer detection (DPD), Internet Key Exchange (IKE), split DNS, VPN backup
Firewall security	Stateful packet inspection (SPI) firewall
Security algorithms	3DES, 128-bit AES, 192-bit AES, 256-bit AES, DES, HTTPS, IPSEC
VPN tunnels quantity	50
Authentication method	SHA-1, MD5
MAC address filtering	-
Certification	FCC Class B, CE Class B, UL, cUL, CB
Input current	1 A
Output voltage	12 V
Storage temperature (T-T)	0 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 90 %
Operating relative humidity (H-H)	10 - 85 %
Product color	Black
Rack mounting	No

Weight and Dimensions

Depth	200 mm
Width	130 mm
Height	38.5 mm
Weight	600 g