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Chapter 3 Connection Wizard
NBG-418N User’s Guide
26
The following table describes the labels in this screen,
3.4.1
Ethernet Connection
Choose
Ethernet
when the WAN port is used as a regular Ethernet. Continue to
Section 3.4.4 on
page 28
.
Figure 13
Wizard Step 3: Ethernet Connection
3.4.2
PPPoE Connection
Point-to-Point Protocol over Ethernet (PPPoE) functions as a dial-up connection. PPPoE is an IETF
(Internet Engineering Task Force) standard specifying how a host personal computer interacts with
a broadband modem (for example DSL, cable, wireless, etc.) to achieve access to high-speed data
networks.
For the service provider, PPPoE offers an access and authentication method that works with existing
access control systems (for instance, RADIUS).
One of the benefits of PPPoE is the ability to let end users 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 specific users.
Operationally, PPPoE saves significant effort for both the subscriber and the ISP/carrier, as it
requires no specific configuration of the broadband modem at the subscriber’s site.
By implementing PPPoE directly on the NBG-418N (rather than individual computers), the
computers on the LAN do not need PPPoE software installed, since the NBG-418N does that part of
the task. Furthermore, with NAT, all of the LAN's computers will have Internet access.
Table 6
Wizard Step 3: ISP Parameters
CONNECTION TYPE
DESCRIPTION
Ethernet
Select the
Ethernet
option when the WAN port is used as a regular Ethernet.
PPPoE
Select the
PPP over Ethernet
option for a dial-up connection. If your ISP gave
you an IP address and/or subnet mask, then select
PPTP
.
PPTP
Select the
PPTP
option for a dial-up connection.
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27
Figure 14
Wizard Step 3: PPPoE Connection
The following table describes the labels in this screen.
3.4.3
PPTP Connection
Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables transfers of data from a
remote client to a private server, creating a Virtual Private Network (VPN) using TCP/IP-based
networks.
PPTP supports on-demand, multi-protocol, and virtual private networking over public networks,
such as the Internet.
Refer to the appendix for more information on PPTP.
Note: The NBG-418N supports one PPTP server connection at any given time.
Table 7
Wizard Step 3: PPPoE Connection
LABEL
DESCRIPTION
ISP Parameter for Internet Access
Connection Type
Select the
PPP over Ethernet
option for a dial-up connection.
Service Name
Type the name of your service provider.
User Name
Type the user name given to you by your ISP.
Password
Type the password associated with the user name above.
Back
Click
Back
to return to the previous screen.
Next
Click
Next
to continue.
Exit
Click
Exit
to close the wizard screen without saving.
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Chapter 3 Connection Wizard
NBG-418N User’s Guide
28
Figure 15
Wizard Step 3: PPTP Connection
The following table describes the fields in this screen
3.4.4
Your IP Address
The following wizard screen allows you to assign a fixed IP address or give the NBG-418N an
automatically assigned IP address depending on your ISP.
Table 8
Wizard Step 3: PPTP Connection
LABEL
DESCRIPTION
ISP Parameters for Internet Access
Connection Type
Select
PPTP
from the drop-down list box. To configure a PPTP client, you must
configure the
User Name
and
Password
fields for a PPP connection and the PPTP
parameters for a PPTP connection.
User Name
Type the user name given to you by your ISP.
Password
Type the password associated with the User Name above.
PPTP Configuration
Server IP Address
Type the IP address of the PPTP server.
Get automatically
from ISP
Select this radio button if your ISP did not assign you a fixed IP address.
Use fixed IP address
Select this radio button, provided by your ISP to give the NBG-418N a fixed, unique IP
address.
My IP Address
Type the (static) IP address assigned to you by your ISP.
My IP Subnet
Mask
Type the subnet mask assigned to you by your ISP (if given).
My IP Gateway
Type the gateway IP address assigned to you by your ISP (if given).
Back
Click
Back
to return to the previous screen.
Next
Click
Next
to continue.
Exit
Click
Exit
to close the wizard screen without saving.
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Chapter 3 Connection Wizard
NBG-418N User’s Guide
29
Figure 16
Wizard Step 3: Your IP Address
The following table describes the labels in this screen
3.4.5
WAN IP Address Assignment
Every computer on the Internet must have a unique IP address. If your networks are isolated from
the Internet, for instance, only between your two branch offices, you can assign any IP addresses
to the hosts without problems. However, the Internet Assigned Numbers Authority (IANA) has
reserved the following three blocks of IP addresses specifically for private networks.
You can obtain your IP address from the IANA, from an ISP or have it assigned by a private
network. If you belong to a small organization and your Internet access is through an ISP, the ISP
can provide you with the Internet addresses for your local networks. On the other hand, if you are
part of a much larger organization, you should consult your network administrator for the
appropriate IP addresses.
Note: Regardless of your particular situation, do not create an arbitrary IP address;
always follow the guidelines above. For more information on address assignment,
please refer to RFC 1597, Address Allocation for Private Internets and RFC 1466,
Guidelines for Management of IP Address Space.
Table 9
Wizard Step 3: Your IP Address
LABEL
DESCRIPTION
Get automatically from
your ISP
Select this option If your ISP did not assign you a fixed IP address. This is the
default selection. If you choose this option, skip directly to
Section 3.4.9 on page
31
.
Use fixed IP address
provided by your ISP
Select this option if you were given IP address and/or DNS server settings by the
ISP. The fixed IP address should be in the same subnet as your broadband modem
or router.
Back
Click
Back
to return to the previous screen.
Next
Click
Next
to continue.
Exit
Click
Exit
to close the wizard screen without saving.
Table 10
Private IP Address Ranges
10.0.0.0
-
10.255.255.255
172.16.0.0
-
172.31.255.255
192.168.0.0
-
192.168.255.255
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Chapter 3 Connection Wizard
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30
3.4.6
IP Address and Subnet Mask
Similar to the way houses on a street share a common street name, so too do computers on a LAN
share one common network number.
Where you obtain your network number depends on your particular situation. If the ISP or your
network administrator assigns you a block of registered IP addresses, follow their instructions in
selecting the IP addresses and the subnet mask.
If the ISP did not explicitly give you an IP network number, then most likely you have a single user
account and the ISP will assign you a dynamic IP address when the connection is established. The
Internet Assigned Number Authority (IANA) reserved this block of addresses specifically for private
use; please do not use any other number unless you are told otherwise. Let's say you select
192.168.1.0 as the network number; which covers 254 individual addresses, from 192.168.1.1 to
192.168.1.254 (zero and 255 are reserved). In other words, the first three numbers specify the
network number while the last number identifies an individual computer on that network.
Once you have decided on the network number, pick an IP address that is easy to remember, for
instance, 192.168.1.1, for your NBG-418N, but make sure that no other device on your network is
using that IP address.
The subnet mask specifies the network number portion of an IP address. Your NBG-418N will
compute the subnet mask automatically based on the IP address that you entered. You don't need
to change the subnet mask computed by the NBG-418N unless you are instructed to do otherwise.
3.4.7
DNS Server Address Assignment
Use DNS (Domain Name System) 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 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, enter them in the
DNS Server
fields in the
Wizard
and/or
WAN
> Internet Connection
screen.
2
If the ISP did not give you DNS server information, leave the
DNS Server
fields set to
0.0.0.0
in
the
Wizard
screen and/or set to
From ISP
in the
WAN
> Internet Connection
screen for the
ISP to dynamically assign the DNS server IP addresses.
3.4.8
WAN IP and DNS Server Address Assignment
The following wizard screen allows you to assign a fixed WAN IP address and DNS server addresses.

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