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Reference Manual for the ProSafe VPN Firewall FVS114
D-18
Preparing Your Network
202-10098-01, April 2005
Verifying the Readiness of Your Internet Account
For broadband access to the Internet, you need to contract with an Internet service provider (ISP)
for a single-user Internet access account using a cable modem or DSL modem. This modem must
be a separate physical box (not a card) and must provide an Ethernet port intended for connection
to a Network Interface Card (NIC) in a computer. Your firewall does not support a USB-connected
broadband modem.
For a single-user Internet account, your ISP supplies TCP/IP configuration information for one
computer. With a typical account, much of the configuration information is dynamically assigned
when your PC is first booted up while connected to the ISP, and you will not need to know that
dynamic information.
In order to share the Internet connection among several computers, your firewall takes the place of
the single PC, and you need to configure it with the TCP/IP information that the single PC would
normally use. When the firewall’s Internet port is connected to the broadband modem, the firewall
appears to be a single PC to the ISP. The firewall then allows the PCs on the local network to
masquerade as the single PC to access the Internet through the broadband modem. The method
used by the firewall to accomplish this is called Network Address Translation (NAT) or IP
masquerading.
Are Login Protocols Used?
Some ISPs require a special login protocol, in which you must enter a login name and password in
order to access the Internet. If you normally log in to your Internet account by running a program
such as WinPOET or EnterNet, then your account uses PPP over Ethernet (PPPoE).
When you configure your router, you will need to enter your login name and password in the
router’s configuration menus. After your network and firewall are configured, the firewall will
perform the login task when needed, and you will no longer need to run the login program from
your PC. It is not necessary to uninstall the login program.
What Is Your Configuration Information?
More and more, ISPs are dynamically assigning configuration information. However, if your ISP
does not dynamically assign configuration information but instead used fixed configurations, your
ISP should have given you the following basic information for your account:
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Reference Manual for the ProSafe VPN Firewall FVS114
Preparing Your Network
D-19
202-10098-01, April 2005
•
An IP address and subnet mask
•
A gateway IP address, which is the address of the ISP’s router
•
One or more domain name server (DNS) IP addresses
•
Host name and domain suffix
For example, your account’s full server names may look like this:
mail.xxx.yyy.com
In this example, the domain suffix is
xxx.yyy.com
.
If any of these items are dynamically supplied by the ISP, your firewall automatically acquires
them.
If an ISP technician configured your PC during the installation of the broadband modem, or if you
configured it using instructions provided by your ISP, you need to copy the configuration
information from your PC’s Network TCP/IP Properties window or Macintosh TCP/IP Control
Panel before reconfiguring your PC for use with the firewall. These procedures are described next.
Obtaining ISP Configuration Information for Windows Computers
As mentioned above, you may need to collect configuration information from your PC so that you
can use this information when you configure the FVS114 VPN Firewall. Following this procedure
is only necessary when your ISP does not dynamically supply the account information.
To get the information you need to configure the firewall for Internet access:
1.
On the Windows taskbar, click the
Start
button, point to
Settings
, and then click
Control
Panel
.
2.
Double-click the
Network
icon.
The Network window opens, which displays a list of installed components.
3.
Select
TCP/IP
, and then click
Properties
.
The TCP/IP Properties dialog box opens.
4.
Select the
IP Address
tab.
If an IP address and subnet mask are shown, write down the information. If an address is
present, your account uses a fixed (static) IP address. If no address is present, your account
uses a dynamically-assigned IP address. Click “Obtain an IP address automatically”.
5.
Select the
Gateway
tab.
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Reference Manual for the ProSafe VPN Firewall FVS114
D-20
Preparing Your Network
202-10098-01, April 2005
If an IP address appears under Installed Gateways, write down the address. This is the ISP’s
gateway address. Select the address and then click
Remove
to remove the gateway address.
6.
Select the DNS Configuration tab.
If any DNS server addresses are shown, write down the addresses. If any information appears
in the Host or Domain information box, write it down. Click
Disable DNS
.
7.
Click
OK
to save your changes and close the TCP/IP Properties dialog box.
You are returned to the Network window.
8.
Click
OK
.
9.
Reboot your PC at the prompt. You may also be prompted to insert your Windows CD.
Obtaining ISP Configuration Information for Macintosh
Computers
As mentioned above, you may need to collect configuration information from your Macintosh so
that you can use this information when you configure the FVS114 VPN Firewall. Following this
procedure is only necessary when your ISP does not dynamically supply the account information.
To get the information you need to configure the firewall for Internet access:
1.
From the Apple menu, select Control Panels, then TCP/IP.
The TCP/IP Control Panel opens, which displays a list of configuration settings. If the
“Configure” setting is “Using DHCP Server”, your account uses a dynamically-assigned IP
address. In this case, close the Control Panel and skip the rest of this section.
2.
If an IP address and subnet mask are shown, write down the information.
3.
If an IP address appears under Router address, write down the address. This is the ISP’s
gateway address.
4.
If any Name Server addresses are shown, write down the addresses. These are your ISP’s DNS
addresses.
5.
If any information appears in the Search domains information box, write it down.
6.
Change the “Configure” setting to “Using DHCP Server”.
7.
Close the TCP/IP Control Panel.
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Reference Manual for the ProSafe VPN Firewall FVS114
Preparing Your Network
D-21
202-10098-01, April 2005
Restarting the Network
Once you’ve set up your computers to work with the firewall, you must reset the network for the
devices to be able to communicate correctly. Restart any computer that is connected to the FVS114
VPN Firewall.
After configuring all of your computers for TCP/IP networking and restarting them, and
connecting them to the local network of your FVS114 VPN Firewall, you are ready to access and
configure the firewall.
Page 200 / 212
Reference Manual for the ProSafe VPN Firewall FVS114
D-22
Preparing Your Network
202-10098-01, April 2005

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