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Page 41 / 249 Scroll up to view Page 36 - 40
Getting Started
36
LAN with a DHCP server
Add a lease to your existing DHCP server to reserve the IP address you chose in
STEP 3
for the CyberGuard SG appliance’s LAN connection.
If you chose to set the CyberGuard SG appliance’s LAN connection settings using
Manual configuration
, you may simply remove this address from the pool of available
addresses.
Enter this same IP address as the gateway IP address to be handed out by the DHCP
server.
Enter this same IP address as the DNS server IP address to be handed out by the DHCP
server.
Restart all the PCs on the network (this will reset their gateway and DNS addresses).
Note
The purpose of restarting the computers is to force them to gain a new DHCP lease.
Alternatively you can use a utility such as
ipconfig
to release then renew a lease, or
disable and re-enable the network connection.
LAN with no DHCP server
A DHCP server allows PCs to automatically obtain network settings when they start up.
If your network does not have a DHCP server, you may either manually set up each PC
on your network, or
set up the CyberGuard SG appliance's DHCP server.
Note
If you only have several PCs, we suggest manually setting up your network.
If you have
more PCs, enabling the CyberGuard SG appliance’s DHCP server is more scalable.
Page 42 / 249
Getting Started
37
To manually set up each Windows PC on your network:
Click
Start
->
Settings
->
Control Panel
and double click
Network
Connections
(or in 95/98/Me, double click
Network
).
If presented with multiple connections, right click on
Local Area Connection
(or
appropriate network connection) and select
Properties
.
Select
Internet Protocol (TCP/IP)
and click
Properties
(or in 95/98/Me,
TCP/IP
->
[your network card name]
if there are multiple entries).
Enter the following details:
IP address
is an IP address that is part of the same subnet range as the
CyberGuard SG appliance’s LAN connection (e.g. if using the default settings,
192.168.0.2 – 192.168.0.254).
•
Subnet mask
is the subnet mask of the CyberGuard SG appliance’s LAN
connection.
•
Default gateway
is the IP address of the CyberGuard SG appliance’s
LAN connection.
•
Preferred DNS server
is the IP address of the CyberGuard SG
appliance’s LAN connection.
Click
OK
(or in 95/98/Me,
Add
then
OK
, reboot the PC if prompted to do so).
Perform these steps for each PC on your network.
You are now finished.
Page 43 / 249
Getting Started
38
Alternatively, to activate your CyberGuard SG appliance's DHCP server:
Launch Internet Explorer (or your preferred web browser) and navigate to the IP
address of the CyberGuard SG appliance’s LAN connection.
The Web Management Console will display.
Select
DHCP Server
from the
Networking
menu.
Click
Add Server
and configure the DHCP server with the following details:
•
Gateway Address
is the IP address of the CyberGuard SG appliance’s
LAN connection, or leave it blank.
•
DNS Address
is the IP address of the CyberGuard SG appliance’s LAN
connection, or leave it blank.
•
WINS Address
(optional) is the IP address of any existing WINS server
on your LAN.
•
Default Lease Time and Maximum Lease Time
should generally be left
at their default values.
•
Initial Dynamic IP Address Range
is a range of free IP addresses on
your LAN’s subnet for the CyberGuard SG appliance to hand out to PCs
on your LAN.
Note
For a detailed description of configuring DHCP Server Settings, please refer to
the User Manual.
Each PC on your LAN must now be set up to use DHCP.
For each PC on your
LAN:
Click
Start
->
Settings
->
Control Panel
and double click
Network
Connections
(or in 95/98/Me, double click
Network
).
If presented with multiple connections, right click on
Local Area Connection
(or
appropriate network connection) and select
Properties
.
Page 44 / 249
Getting Started
39
Select
Internet Protocol (TCP/IP)
and click
Properties
(or in 95/98/Me,
TCP/IP
->
[your network card name]
if there are multiple entries) and click
Properties
(in 95/98/Me, you may also have to click the
IP Address
tab).
Figure 2-12
Check
Obtain an IP address automatically
, check
Obtain DNS server address
automatically
and click
OK
(in 95/98/Me, reboot the PC if prompted to do so).
You are now finished.
Page 45 / 249
Getting Started
40
CyberGuard SG PCI Appliances
Install your CyberGuard SG Appliance in a Spare PCI Slot
Power off your PC and remove its cover.
Select an unused PCI slot and insert the
CyberGuard SG appliance, then power on your PC.
Install the Network Driver on your PC
The CyberGuard SG appliance will be automatically detected and have the appropriate
driver installed when Windows starts up.
It will be detected as a Realtek RTL8139-series
Fast Ethernet Adapter.
Note
You can check that a new network adapter has been installed under Windows 2000/XP
by clicking
Start
,
Settings
,
Network and Dialup Connections
,
Local Area Connection
(possibly followed by a number),
Properties
and ensure the adapter is listed in the
Connect using
field.
Set up your PC to Connect to the Web Management Console
Note
The following steps assume you want to set up the CyberGuard SG appliance in
bridged
mode
, so that it sits between your PC and the LAN transparently filtering network traffic.
If you want to set up the CyberGuard SG appliance for
NAT mode
or to connect directly
to your ISP, refer to the chapter entitled
Network Connections
.
The CyberGuard SG appliance ships with initial, static IP settings of:
IP address:
192.168.0.1
Subnet mask:
255.255.255.0
Your CyberGuard SG appliance will to have its network settings set appropriately for your
LAN before it is connected.

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