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

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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