User manual

Getting Started
20
Otherwise, select 4 LAN Ports.
Set up the PCs on your LAN to access the Internet
Review your configuration changes. Once you are satisfied, click Finish to activate the
new configuration.
Note
If you have changed the CyberGuard SG appliance’s LAN connection settings, it may
become uncontactable at this point. This step describes how to set up the PCs on your
network to access the CyberGuard SG appliance and the Internet.
Connect your CyberGuard SG appliance to your LAN if you haven’t already done so.
If you are setting up the SG300, you connect PCs and your LAN hub directly to its LAN
switch.
If you are setting up the SG560, SG565 or SG580 and have configured its switch as 4
LAN Ports, you may also connect PCs and your LAN hub directly to switch A.
If you are setting up the SG560, SG565 or SG580 and have configured its switch as 1
LAN Port, 3 Isolated Ports, connect port A1 directly to your LAN hub.
Otherwise, connect your CyberGuard SG appliance’s LAN port directly to your LAN hub
using the straight through Ethernet cable (blue).
To access the Internet, the PCs and other hosts on your LAN must be assigned an
address within the bounds of the subnet described by the CyberGuard SG appliance’s IP
address and subnet mask. Each host on your LAN must also designate the CyberGuard
SG appliance’s LAN IP address as their gateway and as their DNS server for Internet
domain name resolution.
This is accomplished one of three ways, depending on how your LAN is set up:
• You want to use the CyberGuard SG appliance’s built-in DHCP server
(recommended) – proceed to Automatic configuration of your LAN.
• Your LAN has an existing DHCP server that you want to use instead of the
CyberGuard SG appliance’s built-in DHCP server – proceed to Automatic
configuration of your LAN using an existing DHCP server.