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Page 41 / 244 Scroll up to view Page 36 - 40
Chapter 4 Connection Wizard
NBG-416N User’s Guide
41
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-416N (rather than individual
computers), the computers on the LAN do not need PPPoE software installed,
since the NBG-416N does that part of the task. Furthermore, with NAT, all of the
LAN's computers will have Internet access.
Figure 18
Wizard Step 3: PPPoE Connection
The following table describes the labels in this screen.
Table 12
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.
Page 42 / 244
Chapter 4 Connection Wizard
NBG-416N User’s Guide
42
4.4.3
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-416N supports one PPTP server connection at any given time.
Figure 19
Wizard Step 3: PPTP Connection
The following table describes the fields in this screen
Table 13
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.
Page 43 / 244
Chapter 4 Connection Wizard
NBG-416N User’s Guide
43
4.4.4
Your IP Address
The following wizard screen allows you to assign a fixed IP address or give the
NBG-416N an automatically assigned IP address depending on your ISP.
Figure 20
Wizard Step 3: Your IP Address
The following table describes the labels in this screen
Connection ID/
Name
Enter the connection ID or connection name in this field. It must follow
the "c:id" and "n:name" format. For example, C:12 or N:My ISP.
This field is optional and depends on the requirements of your ISP.
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-416N 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).
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 13
Wizard Step 3: PPTP Connection (continued)
LABEL
DESCRIPTION
Table 14
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 4.4.9 on page 47
.
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.
Page 44 / 244
Chapter 4 Connection Wizard
NBG-416N User’s Guide
44
4.4.5
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.
4.4.6
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.
Table 15
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
Page 45 / 244
Chapter 4 Connection Wizard
NBG-416N User’s Guide
45
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-416N, 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-416N 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-416N unless you are instructed to do otherwise.
4.4.7
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-416N 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.

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