User Guide

Page 122 SonicWALL Internet Security Appliance User’s Guide
Default LAN Gateway
A Default LAN Gateway is used at a central site in conjunction with a remote site using
the Route all internet traffic through this SA check box. The Default LAN Gateway
field allows the network administrator to specify the IP address of the default LAN route for
incoming IPSec packets for this SA.
Incoming packets are decoded by the SonicWALL and compared to static routes configured
in the SonicWALL. Since packets can have any IP address destination, it is impossible to
configure enough static routes to handle the traffic. For packets received via an IPSec
tunnel, the SonicWALL looks up a route for the LAN. If no route is found, the SonicWALL
checks for a Default LAN Gateway. If a Default LAN Gateway is detected, the packet
is routed through the gateway. Otherwise, the packet is dropped.
integrated_manual.book Page 122 Friday, October 12, 2001 2:56 PM