Private LAN, Internet Services Network | Multitech MTPSR1-120

Configuration 2 - Existing Dual-LAN with Router

Dual Ethernet ProxyServer User Guide

Configuration 2 - Existing Dual-LAN with Router

Another typical configuration ties the private LAN (LAN 1) to an existing Internet Services Network, which already provides Internet services. This configuration provides firewall and gateway security for the LAN users, and supports Internet access restrictions based on IP address, client protocols, or a list of forbidden sites.

Internet

MTPSR1-120 Firewall

IP Address 192.168.0.101

Mask 255.255.255.0

LAN 1

Private

Internet LAN

IP Address 204.26.12.9

Mask 255.255.255.0Router

IP address

204.26.12.10

LAN 2

Public

HUB

NovellTM Server

IP Address 192.168.0.102

Windows NT TM Server IP Address

192.168.0.103

Mail Server	Workstation
IP Address	IP Address
192.168.0.104	192.168.0.105

Workstation IP Address 192.168.0.107

Workstation IP Address 192.168.0.106

HUB

Private LAN

Web Server	FTP Server	Video Server
IP Address	IP Address	IP Address
204.26.12.20	204.26.12.30	204.26.12.40

Internet Services

Network

Figure 4-2. Existing Dual-LAN with Router Configuration

In the configuration shown in Figure 4-2, the ProxyServer is connected to the private LAN via the LAN 1 connection of the back of the ProxyServer. The Internet Services Network, or public LAN, is connected to the LAN 2 connector on the back of the unit. Connection to the Internet is then provided by the existing router connected to the Internet Services Network.

During the loading of the Firewall software, the Secured LAN Port Parameters group (in the IP Setup dialog box) was configured to include an IP Address of 192.168.0.101, and a default Net Mask of 255.255.2.55.0 for the private LAN (LAN 1). The Internet LAN Port Parameters group was configured with the DHCP Client option disabled, and the static IP Address of 204.26.12.10 was entered. This address is the existing static IP address that had already been assigned to the Internet Services Network router. A Net Mask of 255.255.255.0 was then entered to complete the configuration of the public LAN (LAN 2).

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Multitech MTPSR1-120 manual Configuration 2 - Existing Dual-LAN with Router, 2. Existing Dual-LAN with Router Configuration

Contents

Dual Ethernet ProxyServer Model MTPSR1-120 User Guide Patents User GuideRecord of Revisions RevisionDescription TRADEMARK Chapter 1 - Introduction and Description Chapter 2 - InstallationChapter 3 - Software Loading and Configuration Chapter 4 - Firewall Software Appendixes Chapter 5 - Remote Configuration and ManagementChapter 6 - Warranty, Service and Tech Support Index Chapter 1 - Introduction and Description Introduction Chapter 2 - InstallationChapter 3 - Software Loading and Configuration Preview of this Guide Chapter 4 - ProxyServer Software Chapter 5 - Remote Configuration and ManagementChapter 6 - Warranty, Service and Tech Support Appendixes ETHERNET 1 and PowerFront Panel Description WAN Link Command Connector RS232/V.35 ConnectorEthernet 1 and 2 10Base-T Connectors Power Connector Ethernet Ports SpecificationsCommand Port WAN Link Chapter 2 - Installation Figure 2-1. Unpacking Safety WarningsUnpacking Your ProxyServer Figure 2-2. Cabinet Mounting Screw V.35 Shunt ProcedureStep Procedure Figure 2-3. Shunt Positions Figure 2-4. Cable Connections Cabling Procedure Step ProcedureCabling Your ProxyServer Chapter 2 - Installation Table 2-1. cont’d Step Procedure Dual Ethernet ProxyServer User Guide Chapter 3 - Software Loading and Configuration Loading Your Software Chapter 3 - Software Loading and Configuration 7. The “Do you want to download default setup?” dialog is displayed IP Port Configuration DHCP Relay Agent does not apply Default WAN Link Configuration 19. The Writing Setup dialog box is displayed as the setup configuration is written to the ProxyServer Chapter 4 - Firewall Software Typical Applications Configuration 1 - Cable/DSL ModemFigure 4-1. Cable/DSL Modem Configuration Private LAN Chapter 4 - Firewall Software Internet Services Network Configuration 2 - Existing Dual-LAN with RouterFigure 4-2. Existing Dual-LAN with Router Configuration Private LAN Configuration 3 - New Dual-LAN with T1 DSU Figure 4-3. New Dual-LAN with T1 DSU Configuration The Internet LAN Port Parameters group is either configured with the DHCP Client option active, enabling the ISP to dynamically provide the registered Internet IP addresses, or with the DHCP Client option disabled if a static IP addressing scheme is provided by the ISP. If the DHCP Client field is deactivated the static IP Address of 204.26.12.10 is then entered and the WAN option is checked in the Internet Gateway Parameters group Firewall Program Group Configuration Port SetupDownload Default Setup WAN Device Configuration Download Firmware UpdateUninstall Firewall Configuration Firewall Configuration Changing IP Parameters Net Mask - Enter the Subnetwork Mask for the WAN port in this field Changing WAN Port Parameters Adding Proxy Applications Enabling the DHCP Server Enabling PPP Chapter 5 - Remote Configuration and ManagementEnabling PPP/SLIP Enabling SLIP Applications Statistics Filtering Chapter 5 - Remote Configuration and Management Modem-Based Remote Configuration Procedure Connect the modem to your local telephone line Click OK when you are satisfied with your selections LAN-Based Remote Configuration Procedure Windows Sockets Compliant TCP/IP Stack 8 Click Exit when the downloading is complete Remote Management Telnet The Firewall Management Menu provides two basic options Firewall Configuration and WAN Device Configuration. A further option enables you to close the Telnet session from this menu by pressing the Esc key Firewall ConfigurationFirewall Management Menu WEB Management Chapter 6 - Warranty, Service and Tech Support Limited Warranty On-line Warranty Registration Recording ProxyServer Information Chapter 6 - Warranty, Service and Technical SupportTech Support MULTI-TECH SYSTEMS, INC 2205 WOODALE DRIVE MOUNDS VIEW, MINNESOTA ServiceATTN SERVICE OR REPAIRS To Download a File The Multi-Tech BBSTo Log on to the Multi-Tech BBS If you know the file name About the Internet About the Multi-Tech Fax-Back ServiceAbout CompuServe ftp//ftp.multitech.com Appendixes Dual Ethernet ProxyServer User Guide Appendix A - TCP/IP Description Internet Protocol IP Index F Secured LAN Port Parameters Configuration 2 - Existing Dual-LAN with Router26Configuration 3 - New Dual-LAN with T1 DSU 20, 33