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Page 81 / 209 Scroll up to view Page 76 - 80
Chapter 10 WAN
NBG6817 User’s Guide
81
The following table describes the labels in this screen.
Table 20
Network > WAN > Internet Connection: PPPoE Encapsulation
LABEL
DESCRIPTION
ISP Parameters for Internet Access
Encapsulation
Select
PPPoE
if you connect to your Internet via dial-up.
IPv4 / IPv6
Select
IPv4 Only
if you want the NBG6817 to run IPv4 only.
Select
Dual Stack
to allow the NBG6817 to run IPv4 and IPv6 at the same time.
Select
IPv6 Only
if you want the NBG6817 to run IPv6 only.
PPP Information
PPP Username
Type the user name given to you by your ISP.
PPP Password
Type the password associated with the user name above.
MTU Size
Enter the Maximum Transmission Unit (MTU) or the largest packet size per frame that
your NBG6817 can receive and process.
PPP Auto Connect
Select this option if you do not want the connection to time out.
IDLE Timeout
(second)
This value specifies the time in seconds that elapses before the router automatically
disconnects from the PPPoE server.
PPPoE Service
Name
Enter the PPPoE service name specified in the ISP account.
WAN IP Address Assignment
Get automatically
from ISP
Select this option If your ISP did not assign you a fixed IP address. This is the default
selection.
Use Fixed IP
Address
Select this option and enter your WAN IP address if the ISP assigned a fixed IP address.
DNS Server
First DNS Server
Second DNS
Server
Third DNS Server
Select
Obtained From ISP
if your ISP dynamically assigns DNS server information (and
the NBG6817's WAN IP address). The field to the right displays the (read-only) DNS
server IP address that the ISP assigns.
Select
User-Defined
if you have the IP address of a DNS server. Enter the DNS server's
IP address in the field to the right.
Select
None
if you do not want to configure DNS servers. If you do not configure a DNS
server, you must know the IP address of a computer in order to access it.
WAN MAC Address
The MAC address section allows users to configure the WAN port's MAC address by using the NBG6817’s MAC
address, copying the MAC address from a computer on your LAN or manually entering a MAC address.
Factory default
Select
Factory default
to use the factory assigned default MAC Address.
Clone the
computer’s MAC
address - IP
Address
Select
Clone the computer's MAC address - IP Address
and enter the IP address of
the computer on the LAN whose MAC you are cloning.
Set WAN MAC
Address
Select this option and enter the MAC address you want to use.
IPv6 Tunneling
Use IPv6 tunneling when the local network uses IPv6 and the ISP has an IPv4 network. When the NBG6817
has an IPv4 WAN address and you set
IPv4/IPv6
mode to
IPv4 Only
, you can enable IPv6 tunneling to
encapsulate IPv6 packets in IPv4 packets to cross the ISP’s IPv4 network.
Page 82 / 209
Chapter 10 WAN
NBG6817 User’s Guide
82
IPv6 Tunneling
Select
None
to not allow IPv6 packets to cross IPv4 networks.
Select
6RD
to enable 6RD. IPv6 Rapid Deployment (6RD) is an IPv6 transitioning
process for stateless tunneling of IPv6 over IPv4. Enable 6RD to allow tunneling across
an ISP's IPv4 only access network.
Select
6to4
to transmit IPv6 packets over an IPv4 network. A 6to4 relay router is
required to route 6to4 packets to a native IPv6 network.
Select
6in4
if the NBG6817 has a public IPv4 address and you want to transmit your
IPv6 packets to one and only one remote site whose LAN network is also an IPv6
network. You must know the WAN IP address of the remote gateway.
6RD
The NBG6817 generates a global IPv6 prefix from its IPv4 WAN address and tunnels IPv6 traffic to the ISP’s
Border Relay router to connect to the native IPv6 Internet. The local network can also use IPv4 services. The
NBG6817 uses its configured IPv4 WAN IP to route IPv4 traffic to the IPv4 Internet.
This is available only when you select
IPv4 Only
in the
IPv4/IPv6
field.
Automatically
configured by
DHCPC
Select this to have the NBG6817 detect the relay server’s IP address automatically
through DHCP.
Manually
Configured
Select this if you have the IPv4 address of the relay server.
Border Relay IPv4
Address
Specify the relay server’s IPv4 address.
Service Provider
IPv6 Prefix
Enter an IPv6 prefix for tunneling IPv6 traffic to the ISP’s Border Relay router and
connecting to the native IPv6 Internet.
Service Provider
IPv6 Prefix length
Enter the IPv6 prefix length.
An IPv6 prefix length specifies how many most significant bits (starting from the left) in
the address compose the network address.
IPv4 mask length
Enter the subnet mask number (1~32) for the IPv4 network.
6to4
The NBG6817 should get a public IPv4 address for the WAN. The NBG6817 adds an IPv4 IP header to an IPv6
packet when transmitting the packet to the Internet. In reverse, the NBG6817 removes the IPv4 header from
an IPv6 packet when receiving it from the Internet.
This is available only when you select
IPv4 Only
in the
IPv4/IPv6
field.
Relay Server IPv4
Address
Enter the IPv4 address of a 6to4 relay server which helps forward packets between 6to4
networks and native IPv6 networks.
6in4
The NBG6817 encapsulates IPv6 packets within IPv4 packets across the Internet. You must know the WAN IP
address of the remote gateway device. This mode is normally used for a site-to-site application such as two
branch offices.
This is available only when you select
IPv4 Only
in the
IPv4/IPv6
field.
Remote IPv4
Address
Enter the IPv4 address of the remote gateway to which this interface tunnels traffic.
Remote IPv6
Address
Enter the IPv6 address of the remote gateway to which this interface tunnels traffic.
Local IPv6 Address
Enter the IPv6 address assigned by your ISP.
IPv6 Prefix
Enter the IPv6 prefix for this interface if you want to use a static IP address.
Table 20
Network > WAN > Internet Connection: PPPoE Encapsulation (continued)
LABEL
DESCRIPTION
Page 83 / 209
Chapter 10 WAN
NBG6817 User’s Guide
83
10.4.3
PPTP Encapsulation
This screen displays when you select
PPTP
encapsulation.
IPv6 DNS Server
This is available only when you select
IPv4 Only
in the
IPv4/IPv6
field and set
IPv6 Tunneling
to
6RD
,
6in4
or
6to4
.
First DNS Server
Second DNS
Server
Third DNS Server
Specify the DNS server IPv6 address assigned by the ISP.
IPv6 DNS Server
This is available only when you select
Dual Stack
or
IPv6 Only
in the
IPv4/IPv6
field.
First DNS Server
Second DNS
Server
Third DNS Server
Select
Obtained From ISP
to have the NBG6817 get the IPv6 DNS server addresses
from the ISP automatically.
Select
User-Defined
and enter the IPv6 DNS server address assigned by the ISP to
have the NBG6817 use the IPv6 DNS server addresses you configure manually.
Select
None
if you do not want to configure DNS servers. If you do not configure a DNS
server, you must know the IPv6 address of a computer in order to access it.
Multicast Setup
Multicast Setup
Select
IGMPv1/v2
to enable multicasting. This applies to traffic routed from the WAN to
the LAN.
Select
None
to disable this feature. This may cause incoming traffic to be dropped or
sent to all connected network devices.
Auto-Subnet Configuration
Enable Auto-IP-
Change Mode
Select this option to have the NBG6817 change its LAN IP address to 10.0.0.1 or
192.168.1.1 accordingly when the NBG6817 gets a dynamic WAN IP address in the same
subnet as the LAN IP address.
Select this option to have the NBG6817 change its LAN IP address to 10.0.0.1 or
192.168.1.1 accordingly when the NBG6817 gets a DNS server IP address in the same
subnet as the LAN IP address.
The NAT, DHCP server and firewall functions on the NBG6817 are still available in this
mode.
Apply
Click
Apply
to save your changes back to the NBG6817.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Table 20
Network > WAN > Internet Connection: PPPoE Encapsulation (continued)
LABEL
DESCRIPTION
Page 84 / 209
Chapter 10 WAN
NBG6817 User’s Guide
84
Figure 56
Expert Mode > WAN > Internet Connection: PPTP Encapsulation (IPv4 Only)
Page 85 / 209
Chapter 10 WAN
NBG6817 User’s Guide
85
The following table describes the labels in this screen.
Table 21
Network > WAN > Internet Connection: PPTP Encapsulation
LABEL
DESCRIPTION
ISP Parameters for Internet Access
Encapsulation
Select
PPTP
if you want to connect the Internet via point to point tunneling protocol.
IPv4 / IPv6
This field is greyed out. The PPTP encapsulation only supports IPv4.
PPTP Information
PPTP Username
Enter the user name given to you by your ISP.
PPTP Password
Enter the password associated with the user name above.
PPTP Encryption
Type
Use the drop-down list box to select the type of Microsoft Point-to-Point Encryption
(MPPE). Options are:
Auto
- This ISP account adjusts the encryption type automatically.
No Encryption
- This ISP account does not use MPPE.
MPPE 40
- This ISP account uses 40-bit MPPE.
MPPE 128
- This ISP account uses 128-bit MMPE.
MTU Size
Enter the MTU (Maximum Transmission Unit) size for each packet. If a larger packet
arrives, the NBG6817 divides it into smaller fragments.
PPTP Auto Connect
Select this option if you do not want the connection to time out.
IDLE Timeout
[second]
Type the time in seconds that elapses before the router automatically disconnects from
the PPTP server. 0 means no timeout.
PPTP CONFIGURATION
PPTP Server IP
Address
Enter the IP address of the PPTP server.
Obtain an IP
Address
Automatically(DHCP
)
Select this radio button if the PPTP server did not assign you a fixed IP address.
Static IP Address
Select this radio button if the PPTP server assigned an IP address for your Internet
connection.
IP Address
Enter the IP address provided by the PPTP server.
Subnet Mask
Enter the IP subnet mask in this field.
Default Gateway
Enter the gateway IP address in this field.
WAN IP Address Assignment
Get automatically
from ISP
Select this option If your ISP did not assign you a fixed IP address. This is the default
selection.
Use Fixed IP
Address
Select this option If the ISP assigned a fixed IP address.
IP Address
Enter your WAN IP address in this field if you selected
Static IP Address
.
DNS Server
First DNS Server
Second DNS Server
Third DNS Server
Select
Obtained From ISP
if your ISP dynamically assigns DNS server information
(and the NBG6817's WAN IP address). The field to the right displays the (read-only)
DNS server IP address that the ISP assigns.
Select
User-Defined
if you have the IP address of a DNS server. Enter the DNS
server's IP address in the field to the right.
Select
None
if you do not want to configure DNS servers. If you do not configure a DNS
server, you must know the IP address of a computer in order to access it.

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