Netgear UTM9S – ProSECURE Unified Threat Management (UTM) Appliance with DSL and Wireless modules 参照マニュアル

These are some advantages of the network database:

Generally, you do not need to enter an IP address or a MAC address. Instead, you can 

just select the name of the desired PC or device. 

There is no need to reserve an IP address for a PC in the DHCP server. All IP address 

assignments made by the DHCP server are maintained until the PC or device is removed 
from the network database, either by expiration (inactive for a long time) or by you.

There is no need to use a fixed IP address on a PC. Because the IP address allocated by 
the DHCP server never changes, you do not need to assign a fixed IP address to a PC to 
ensure that it always has the same IP address. 

A PC is identified by its MAC address—not its IP address. The network database uses 

the MAC address to identify each PC or device. Therefore, changing a PC’s IP address 
does not affect any restrictions applied to that PC. 

Control over PCs can be assigned to groups and individuals:

You can assign PCs to groups (see 

on this page) and 

apply restrictions (outbound rules and inbound rules) to each group (see 

You can select groups that are allowed access to applications, web categories, and 
URLs that you have blocked for all other users, or the other way around, block access 
to applications, web categories, and URLs that you have allowed access to for all 
other users (see 

If necessary, you can also create firewall rules to apply to a single PC (see 

on page 164). Because the MAC address is used to identify 

each PC, users cannot avoid these restrictions by changing their IP address.

Manage the Network Database

You can view the network database, manually add or remove database entries, and edit 
database entries.

To view the network database, select Network Config > LAN Settings > LAN Groups. The 
LAN Groups screen displays. (The following figure shows some examples in the Known PCs 
and Devices table.)