Configuring Intranet Settings

SonicWALLs can be installed between LAN segments of intranets to prevent unauthorized access to certain resources. For example, if the administrative offices of a school are on the same network as the student computer lab, they can be separated by a SonicWALL.

Figure 3 shows how a SonicWALL appliance can be installed between two network segments on an Intranet.

Figure 3. SonicWALL Intranet Configuration

NOTE: Devices connected to the WAN port do not have firewall or content filter protection. To protect these units, install another SonicWALL appliance between the Internet and devices connected to the WAN port of the other SonicWALL appliance.

Although the systems on the WAN and LAN links are separated, they are still on the same subnet. Consequentially, you must make the systems on the larger network aware of the systems on the smaller network.

To do this, complete the following steps:

1	Expand the Network tree and click Intranet. The Intranet page displays.

 

2	Select from the following:

•	If the SonicWALL is not used to separate LAN segments on the intranet, select SonicWALL’s WAN link is connected to the Internet Router.

•	If the smaller network is connected to the LAN, select Specified addresses are attached to the LAN link.

•	If the smaller network is connected to the WAN, select Specified addresses are attached to the WAN link.

3	Enter the IP address or IP address range of a system or group of systems on the smaller network:

•	To enter a single IP address, enter the IP address in the Addr Range Begin field.

•	To enter a range of IP addresses, enter the starting IP address in the Addr Range Begin field and the ending IP address in the Addr Range End field.

•	Click Add Range.

4	Repeat Step 3 for each IP address or IP address range on the smaller network.

5	When you are finished, click Update. The settings are changed for each selected SonicWALL appliance. To clear all screen settings and start over, click Reset.

6	To define which services can be accessed from outside the restricted network segment, refer to Configuring Firewall Settings in SonicOS Standard .