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Advanced Settings
121
CENTRIA WNDR4700/WNDR4720
Auto Detect Fields
In the IPv6 screen, when you select
Auto Detect
from the drop-down list, the following
screen displays.
The Connection Type field indicates the connection type detected. The following fields are
also included in this screen:
IPv6 LAN Setup
Router's IPv6 Address on WAN
. The IPv6 address acquired for the router's WAN (or
Internet) interface. The number after the slash ('/') is the length of the prefix, which is also
roughly indicated by the underline ('_') under the IPv6 address.
Router's IPv6 Address on LAN
. The IPv6 address acquired for the router's LAN interface.
The number after the slash ('/') is the length of the prefix, which is also roughly indicated by
the underline ('_') under the IPv6 address.
IP Address Assignment
. You can select how you want to assign IPv6 address to the
devices on your home network (the LAN). You can select either
DHCP Server
or
Auto
Config
to assign an IPv6 address. Using DHCP Server might pass more information to LAN
devices, but some IPv6 systems might not support the DHCv6 client function. Auto Config is
selected by default.
Use This Interface ID
. You can enable this option and specify the interface ID that you want
for the IPv6 address for the router's LAN interface. If you do not specify an ID here, the router
generates one automatically from its MAC address.
IPv6 Filtering
When the connection type is not IPv6 Pass Through or Disabled, the router starts the SPI
firewall function on the WAN interface. The router creates connection records and checks
every inbound IPv6 packet. If the inbound packet is not destined to the router itself and the
router does expect to receive such a packet, or the packet is not in the connection record, the
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Advanced Settings
122
CENTRIA WNDR4700/WNDR4720
router blocks this packet. This function has two modes. The default is Secured mode, which
checks both TCP and UDP packets. For Open mode, the checking is applied only to the UDP
connection.
Auto Config
In the IPv6 screen, when you select
Auto Config
from the drop-down list, the following
screen displays.
The following fields are included in this screen:
DHCP User Class
. Most people do not need to fill in this field, but if your ISP has given you a
specific host name, enter it here.
DHCP Domain Name
. This is not needed for most connections. You can type the domain
name of your ISP. For example, if your ISP's mail server is mail.xxx.yyy.zzz, you would type
xxx.yyy.zzz
as the domain name.
If your ISP provided you with a domain name, type it in this field. For example, Earthlink
Cable might require a host name of
home
and Comcast sometimes supplies a domain name.
This is the domain name for the IPv6 connection. Do not enter the domain name for the IPv4
connection here.
The other settings are the same as Auto Detect mode. See
IPv6 LAN Setup
and
IPv6
Filtering
on page
121.
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Advanced Settings
123
CENTRIA WNDR4700/WNDR4720
6to4 Tunnel
In the IPv6 screen, when you select
6to4 Tunnel
from the drop-down list, the following
screen displays.
The following fields are included in this screen:
Remote 6to4 Relay Router
. The remote relay router to which your router creates the 6to4
tunnel. If your ISP provides the address of its own relay router, you can put it here. You can
also leave it as Auto and the router uses any remote relay router that is available. The 6to4
tunnel connection needs the IPv4 Internet connection to be working first.
The other settings are the same as Auto Detect mode. See
IPv6 LAN Setup
and
IPv6
Filtering
on page
121
Pass Through
In this mode, the router works as a layer 2 Ethernet switch with 2 ports (LAN and WAN
Ethernet ports) for IPv6 packets. The router does not process any IPv6header packets.
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Advanced Settings
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CENTRIA WNDR4700/WNDR4720
Fixed
In the IPv6 screen, when you select
Fixed
from the drop-down list, the following screen
displays.
The following fields are included in this screen:
IPv6 Fixed WAN Setup
IPv6 Address/Prefix Length
. The IPv6 address and prefix length of the router's WAN
interface.
Default IPv6 Gateway
. The IPv6 address of the default IPv6 gateway, which is supposed to
be on the router's WAN interface.
Primary/Secondary DNS Server
. The DNS servers that resolve IPv6 domain name records
for you. If these fields are not specified, the router uses the DNS server configured for the
IPv4 Internet connection on the Internet Settings screen. (See
Internet Setup
on page
27.)
IP Address Assignment
. You can select how you want to assign IPv6 addresses to the
devices on your home network (the LAN). You can use either DHCP Server or Auto Config to
assign IPv6 address. Using DHCP Server might pass more information to LAN devices, but
some IPv6 systems might not support the DHCv6 client function. Auto Config is used by
default.
IPb6 Fixed LAN Setup
IPv6 Address/Prefix Length
. The IPv6 address and prefix length of the router's LAN
interface.
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Advanced Settings
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CENTRIA WNDR4700/WNDR4720
DHCP
In the IPv6 screen, when you select
DHCP
from the drop-down list, the following screen
displays.
The following fields are included in this screen:
User Class
. Most people do not need to fill in this field, but if your ISP has given you a
specific host name, enter it here.
Domain Name
. This is not needed for Internet connections. You can type the domain name
of your ISP. For example, if your ISP's mail server is mail.xxx.yyy.zzz, you would type
xxx.yyy.zzz
as the domain name. If your ISP provided a domain name, type it in this field.
(For example, Earthlink Cable might require a host name of
home
and Comcast sometimes
supplies a domain name.)
This is the domain name for the IPv6 connection. Do not enter the domain name for the IPv4
connection here.
The other settings are the same as Auto Detect mode. See
IPv6 LAN Setup
and
IPv6
Filtering
on page
121.

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