Multitech MTPSR1-120 manual Configuration 3 - New Dual-LAN with T1 DSU, Firewall Software

Chapter 4 - Firewall Software

Configuration 3 - New Dual-LAN with T1 DSU

The final typical configuration adds Internet services to existing LAN users. With this configuration, the private LAN (LAN 1) is secured by the firewall while the Internet Services Network is outside the firewall allowing Internet users to access the public LAN (LAN 2) resources, such as the Web, FTP, etc. servers. The Internet connection is provided with a T1 DSU connected to the RS232 connection on the back of the unit.

Internet

T1 DSU

WAN Port

MTPSR1-120 Firewall

IP Address 192.168.0.101

Mask 255.255.255.0

HUB

NovellTM Server

IP Address 192.168.0.102

Windows NT TM Server IP Address

192.168.0.103

Mail Server IP Address 192.168.0.104

LAN 1	LAN 2	Internet LAN
Private	Public
		IP address
		204.26.12.10

		HUB
	Workstation
	IP Address
	192.168.0.107
	Workstation
	IP Address
	192.168.0.106
Workstation
IP Address	Web Server	FTP Server	Video Server
192.168.0.105
	IP Address	IP Address	IP Address
	204.26.12.20	204.26.12.30	204.26.12.40

Private LAN	Internet Services
	Network

Figure 4-3. New Dual-LAN with T1 DSU Configuration

In the configuration shown in Figure 4-3, 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 a T1 DSU connected to the RS232/V.35 connector on the back of the unit.

During the loading of the Firewall software, the Secured LAN Port Parameters group (in the IP Setup dialog box) was configured to include an unregistered IP Address of 192.168.0.101 and default Net Mask of 255.255.255.0 for the private LAN (LAN 1).

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