Multitech PROXYSERVER MTPSR1-120 User's Guide download pdf (Page 24)

Dual Ethernet ProxyServer User Guide

Introduction

This chapter describes the Firewall software used in the Dual Ethernet ProxyServer. It begins

with the description of three typical applications for the ProxyServer. These configuration

examples are followed by a description of the Firewall program group, and examples of how to

add some of the advanced features provided with the software.

Typical Applications

This section describes three typical applications for the Dual Ethernet ProxyServer. This is done

with the assumption that the unit will be configured for a particular application during the initial

installation. The three examples include a detailed diagram, along with a description of the

process involved in setting up the configuration shown.

The first of the applications uses the ProxyServer to connect your private LAN to the Internet

using a cable or Digital Subscriber Line (DSL) modem, providing high speed Internet access. The

second application ties your private LAN and public Internet Services Network (e.g., your existing

public LAN) through its router to the Internet. The third application is similar to the second, but

uses a Data Communications Equipment (DCE) device—in this example, a T1 DSU—connected

to the RS232 port on the back of the ProxyServer to connect to the Internet.

Configuration 1 - Cable/DSL Modem

In the configuration shown in Figure 4-1, the Dual Ethernet ProxyServer is connected to the

private LAN via the LAN 1 connection of the back of the ProxyServer. Connection to the Internet

is then provided by the cable or DSL modem by connecting the Ethernet connector on the

modem to the LAN 2 connection on the ProxyServer.

MTPSR1-120 Firewall

IP Address 192.168.0.101

Mask 255.255.255.0

Internet

Novell Server

IP Address

192.168.0.102

Windows NT Server

IP Address

192.168.0.103

Mail Server

IP Address

192.168.0.104

Workstation

IP Address

192.168.0.105

Workstation

IP Address

192.168.0.106

Workstation

IP Address

192.168.0.107

HUB

LAN 1

Private

LAN 2

Public

Private LAN

Cable/DSL

Modem

Figure 4-1. Cable/DSL Modem Configuration

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 59 60

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