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Reference Manual for the Model CG814M Wireless Cable Modem Gateway
C-10
Preparing Your Network
•
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 gateway automatically acquires
them.
If an ISP technician configured your PC during the installation of the cable 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 gateway. 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 CG814M Gateway. 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 gateway 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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Page 97 / 102
Reference Manual for the Model CG814M Wireless Cable Modem Gateway
Preparing Your Network
C-11
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 CG814M Gateway. 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 gateway 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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Page 98 / 102
Reference Manual for the Model CG814M Wireless Cable Modem Gateway
C-12
Preparing Your Network
Restarting the Network
Once you’ve set up your computers to work with the gateway, you must reset the network for the
devices to be able to communicate correctly. Restart any computer that is connected to the firewall.
After configuring all of your computers for TCP/IP networking and restarting them, and
connecting them to the local network of your CG814M Gateway, you are ready to access and
configure the gateway.
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Page 99 / 102
Reference Manual for the Model CG814M Wireless Cable Modem Gateway
Glossary
1
Glossary
10BASE-T
IEEE 802.3 specification for 10 Mbps Ethernet over twisted pair wiring.
100BASE-Tx
IEEE 802.3 specification for 100 Mbps Ethernet over twisted pair wiring.
802.11b
IEEE specification for wireless networking at 11 Mbps using direct-sequence
spread-spectrum (DSSS) technology and operating in the unlicensed radio
spectrum at 2.5GHz.
Denial of Service
attack
DoS. A hacker attack designed to prevent your computer or network from
operating or communicating.
DHCP
See
Dynamic Host Configuration Protocol.
DNS
See
Domain Name Server.
domain name
A descriptive name for an address or group of addresses on the Internet.
Domain names are of the form of a registered entity name plus one of a
number of predefined top level suffixes such as .com, .edu, .uk, etc. For
example, in the address mail.NETGEAR.com, mail is a server name and
NETGEAR.com is the domain.
DOCSIS
Data Over Cable Service Interface Specification. Defines interface
requirements for cable modems involved in high-speed data distribution over
cable television system networks
Domain Name Server
A Domain Name Server (DNS) resolves descriptive names of network
resources (such as www.NETGEAR.com) to numeric IP addresses.
Dynamic Host
Configuration
Protocol
DHCP. An Ethernet protocol specifying how a centralized DHCP server can
assign network configuration information to multiple DHCP clients. The
assigned information includes IP addresses, DNS addresses, and gateway
(router) addresses.
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Page 100 / 102
Reference Manual for the Model CG814M Wireless Cable Modem Gateway
2
Glossary
Gateway
A local device, usually a router, that connects hosts on a local network to other
networks.
IETF
Internet Engineering Task Force. An open international community of
network designers, operators, vendors, and researchers concerned with the
evolution of the Internet architecture and the smooth operation of the Internet.
Working groups of the IETF propose standard protocols and procedures for
the Internet, which are published as RFCs (Request for Comment) at
www.ietf.org.
IP
Internet Protocol. The main internetworking protocol used in the Internet.
Used in conjunction with the Transfer Control Protocol (TCP) to form TCP/IP.
IP Address
A four-position number uniquely defining each host on the Internet. Ranges of
addresses are assigned by Internic, an organization formed for this purpose.
Usually written in dotted-decimal notation with periods separating the bytes
(for example, 134.177.244.57).
IPSec
Internet Protocol Security. IPSec is a series of guidelines for securing private
information transmitted over public networks. IPSec is a VPN method
providing a higher level of security than PPTP.
ISP
Internet service provider.
LAN
See
local area network.
local area network
LAN. A communications network serving users within a limited area, such as
one floor of a building. A LAN typically connects multiple personal
computers and shared network devices such as storage and printers. Although
many technologies exist to implement a LAN, Ethernet is the most common
for connecting personal computers.
MAC address
Media Access Control address. A unique 48-bit hardware address assigned to
every Ethernet node. Usually written in the form 01:23:45:67:89:ab.
Mbps
Megabits per second.
MSB
See
Most Significant Bit or Most Significant Byte.
MTU
See
Maximum Transmit Unit.
Maximum Transmit
Unit
The size in bytes of the largest packet that can be sent or received.
Most Significant Bit or
Most Significant Byte
The portion of a number, address, or field that is farthest left when written as a
single number in conventional hexadecimal ordinary notation. The part of the
number having the most value.
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