ProSafe VPN Firewall 200 FVX538 Reference Manual
3-6 LAN Configuration
v1.0, August 2006
3. Click Reset to discard any changes and revert to the previous settings.

Managing Groups and Hosts (LAN Groups)

The Known PCs and Devices table on the Groups and Hosts screen contains a list of all known
PCs and network devices, as well as hosts, that are assigned dynamic IP addresses by this router.
Collectively , these entries make up the Network Database. The Network Database is created in two
ways:
•DHCP Client Reques ts . By default, the DHCP server in this Router is enabled, and will
accept and respond to DHCP client requests from PCs and other network devices. These
requests also generate an entry in the Network Database. Because of this, leaving the DHCP
Server feature (on the LAN screen) enabled is strongly recommended.
•Scanning the Network. The local network is scanned using standard methods such as ARP.
This will detect active devices which are not DHCP clients. However, sometimes the name of
the PC or device cannot b e accurately determined, and will be shown as Unknown.

Creating the Network Database

Some advantages of the Network Database are:
• Generally, you do not need to enter either IP address or MAC addresses. Instead, you can just
select the desired PC or device.
• No need to reserve an IP address for a PC in the DHCP Server. All IP address assignments
made by the DHCP Server will be maintained until the PC or device is removed from the
database, either by expiry (inactive for a long time) or by you.
• No need to use a Fixed IP on PCs. Because the address allocated by the DHCP Server will
never change, you don't need to assign a fixed IP to a PC to ensure it always has the same IP
address.
• MAC level control over PCs. The Network Database uses the MAC address to identify each
PC or device. So changing a PC’s IP address does not affect any restrictions on that PC.
• Group and individual control over PCs.
Tip: The Secondary LAN IP address will be assigned to the LAN interface of the
router and can be used as a gateway by the secondary subnet.