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NBG-418N v2 User’s Guide
76
C
HAPTER
7
WAN
7.1
Overview
This chapter discusses the NBG-418N v2’s
WAN
screens. Use these screens to configure your NBG-
418N v2 for Internet access.
A WAN (Wide Area Network) connection is an outside connection to another network or the
Internet. It connects your private networks (such as a LAN (Local Area Network) and other
networks, so that a computer in one location can communicate with computers in other locations.
Figure 55
LAN and WAN
See the chapter about the connection wizard for more information on the fields in the WAN screens.
7.2
What You Need To Know
The information in this section can help you configure the screens for your WAN connection, as well
as enable/disable some advanced features of your NBG-418N v2.
7.2.1
Configuring Your Internet Connection
Encapsulation Method
Encapsulation is used to include data from an upper layer protocol into a lower layer protocol. To set
up a WAN connection to the Internet, you need to use the same encapsulation method used by your
ISP (Internet Service Provider). If your ISP offers a dial-up Internet connection using PPPoE (PPP
over Ethernet) or PPTP (Point-to-Point Tunneling Protocol), they should also provide a username
and password (and service name) for user authentication.
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Chapter 7 WAN
NBG-418N v2 User’s Guide
77
WAN IP Address
The WAN IP address is an IP address for the NBG-418N v2, which makes it accessible from an
outside network. It is used by the NBG-418N v2 to communicate with other devices in other
networks. It can be static (fixed) or dynamically assigned by the ISP each time the NBG-418N v2
tries to access the Internet.
If your ISP assigns you a static WAN IP address, they should also assign you the subnet mask and
DNS server IP address(es) (and a gateway IP address if you use the Ethernet or ENET ENCAP
encapsulation method).
DNS Server Address Assignment
Use Domain Name System (DNS) to map a domain name to its corresponding IP address and vice
versa, for instance, the IP address of www.zyxel.com is 204.217.0.2. The DNS server is extremely
important because without it, you must know the IP address of a computer before you can access
it.
The NBG-418N v2 can get the DNS server addresses in the following ways.
1
The ISP tells you the DNS server addresses, usually in the form of an information sheet, when you
sign up. If your ISP gives you DNS server addresses, manually enter them in the DNS server fields.
2
If your ISP dynamically assigns the DNS server IP addresses (along with the NBG-418N v2’s WAN
IP address), set the DNS server fields to get the DNS server address from the ISP.
WAN MAC Address
The MAC address screen allows users to configure the WAN port's MAC address by either using the
factory default or cloning the MAC address from a computer on your LAN. Choose
Factory Default
to select the factory assigned default MAC Address.
Otherwise,
click
Clone the computer's MAC address - IP Address
and enter the IP address of
the computer on the LAN whose MAC you are cloning. Once it is successfully configured, the
address will be copied to configuration file. It is recommended that you clone the MAC address prior
to hooking up the WAN Port.
7.3
Internet Connection Screen
Use this screen to change your NBG-418N v2’s Internet access settings. Click
Network
>
WAN
.
The screen differs according to the connection type you choose.
7.3.1
Ethernet Encapsulation
This screen displays when you select
Ethernet
encapsulation.
Page 78 / 237
Chapter 7 WAN
NBG-418N v2 User’s Guide
78
Figure 56
Network > WAN > Internet Connection: Ethernet Encapsulation
The following table describes the labels in this screen.
Table 31
Network > WAN > Internet Connection: Ethernet Encapsulation
LABEL
DESCRIPTION
ISP Parameters for Internet Access (Ethernet Static)
Connection Type
Choose the
Ethernet (Static)
option when the WAN port is used as a regular Ethernet.
IP Address
Enter your WAN
IP address
in this field.
IP Subnet
Mask
Enter the
IP Subnet Mask
in this field.
Gateway IP
Address
Enter a
Gateway IP Address
(if your ISP gave you one) in this field.
MTU Size
Type the
MTU
or maximum size of each data packet, in bytes, that can move through this
interface. If a larger packet arrives, the NBG-418N v2 divides it into smaller fragments.
Allowed values are 576 to 1500. By default this value is 1500
Page 79 / 237
Chapter 7 WAN
NBG-418N v2 User’s Guide
79
7.3.2
PPPoE Encapsulation
The NBG-418N v2 supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE is an IETF
standard (RFC 2516) specifying how a personal computer (PC) interacts with a broadband modem
First DNS Server
Second DNS
Server
Enter the first and second DNS server's IP address in the fields.
WAN MAC Address
The MAC address section allows users to configure the WAN port's MAC address by either using the NBG-418N
v2’s MAC address, copying the MAC address from a computer on your LAN or manually entering a MAC
address.
Factory default
Select this option to use the factory assigned default MAC Address.
Clone the
computer's MAC
address - MAC
Address
Select this option to clone the MAC address of the computer (displaying in the screen)
from which you are configuring the NBG-418N v2. Once it is successfully configured, the
address will be copied to the rom file. It will not change unless you change the setting or
upload a different ROM file.
Set WAN MAC
Address
Select this option and enter the MAC address you want to use.
ISP Parameters for Internet Access (Ethernet DHCP)
Connection Type
Choose the
Ethernet (DHCP)
option when the WAN port is used as a regular Ethernet.
Host Name
Type the domain name that is associated with this Ethernet connection.
MTU Size
Type the
MTU
or maximum size of each data packet, in bytes, that can move through this
interface. If a larger packet arrives, the NBG-418N v2 divides it into smaller fragments.
Allowed values are 576 to 1500. By default this value is 1500.
DNS Services
Attain DNS
Automatically
Click the
Attain DNS Automatically
button if your ISP dynamically assigns DNS server
information (and the NBG-418N v2’s WAN IP address). The field to the right displays the
(read-only) DNS server IP address that the ISP assigns.
Set DNS Manually
Select
Set DNS Manually
if you have the IP address of a DNS server. You will need to
enter the first and secondary DNS server's IP address in the fields to the bottom.
First DNS Server
Second DNS
Server
Enter the first and second DNS server's IP address in the box fields.
WAN MAC Address
The MAC address section allows users to configure the WAN port's MAC address by either using the NBG-418N
v2’s MAC address, copying the MAC address from a computer on your LAN or manually entering a MAC
address.
Factory default
Select this option to use the factory assigned default MAC Address.
Clone the
computer's MAC
address - MAC
Address
Select this option to clone the MAC address of the computer (displaying in the screen)
from which you are configuring the NBG-418N v2. Once it is successfully configured, the
address will be copied to the rom file. It will not change unless you change the setting or
upload a different ROM file.
Set WAN MAC
Address
Select this option and enter the MAC address you want to use.
Apply
Click
Apply
to save your changes back to the NBG-418N v2.
Reset
Click
Reset
to begin configuring this screen afresh.
Table 31
Network > WAN > Internet Connection: Ethernet Encapsulation (continued)
LABEL
DESCRIPTION
Page 80 / 237
Chapter 7 WAN
NBG-418N v2 User’s Guide
80
(DSL, cable, wireless, etc.) connection. The
PPP over Ethernet
option is for a dial-up connection
using PPPoE.
For the service provider, PPPoE offers an access and authentication method that works with existing
access control systems (for example Radius).
One of the benefits of PPPoE is the ability to let you access one of multiple network services, a
function known as dynamic service selection. This enables the service provider to easily create and
offer new IP services for individuals.
Operationally, PPPoE saves significant effort for both you and the ISP or carrier, as it requires no
specific configuration of the broadband modem at the customer site.
By implementing PPPoE directly on the NBG-418N v2 (rather than individual computers), the
computers on the LAN do not need PPPoE software installed, since the NBG-418N v2 does that part
of the task. Furthermore, with NAT, all of the LANs’ computers will have access.
This screen displays when you select
PPPoE
encapsulation.
Figure 57
Network > WAN > Internet Connection: PPPoE Encapsulation
The following table describes the labels in this screen.
Table 32
Network > WAN > Internet Connection: PPPoE Encapsulation
LABEL
DESCRIPTION
ISP Parameters for Internet Access
Connection Type
Select
PPP over Ethernet
if you connect to your Internet via dial-up.
User Name
Type the user name given to you by your ISP.
Password
Type the password associated with the user name above.

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