Multitech MTPSR1-120 User Manual

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.

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

TM

TM

 LAN 1
Private

LAN 2
Public

 

Video Server

  IP Address
 204.26.12.40

  Web Server
  IP Address
 204.26.12.20

 

FTP Server

  IP Address
 204.26.12.30

HUB

Internet LAN
IP address
204.26.12.10

WAN Port

T1 DSU

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).