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Trend Micro™ InterScan™ Gateway Security Appliance M-Series Deployment Guide

3-6

FIGURE 3-4. Problem: The appliance and clients deployed in different

network segments, with router as default gateway of the

appliance and no static routes set

A routing problem occurs whenever the router performs the following:

• Sending SYN/ACK packet back to clients

• Forwarding data to clients

These transactions lead to a decrease in the network throughput.

Server

Internet

219.219.2.19

192.168.1.254

192.168.1.100

192.168.1.1

10.2.211.136

Core switch/default gateway of

Default gateway of clients

Client

the appliance

InterScan Appliance

Legend

= Traffic between the appliance and the clients

= Traffic between the appliance and the Internet

Core

switch

Problem: Without knowing the

static IP routes, the appliance does

not know where to forward traffic.

Therefore, the appliance forwards

traffic to its default gateway, which

is the router.

Router

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