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D6200 WiFi DSL Modem Router
2.
Click
Next
.
Enter the requested information:
Connection name
. Enter an appropriate name for the connection. This name is not
supplied to the remote VPN endpoint. Rather, it is used to help you manage the VPN
settings.
Pre-shared key
. The key has to be entered both here and on the remote VPN
gateway or the remote VPN client. This method does not require using a CA
(certificate authority).
VPN tunnel connection
. The wizard has to know if you are planning to connect to a
remote gateway or setting up the connection for a remote client or computer to
establish a secure connection to this device.
3.
Click
Next
.
Enter the remote IP address of the gateway you want to connect to, or provide the
Internet name of the gateway. The Internet name is the fully qualified domain name, as
set up in a Dynamic DNS service.
4.
Click
Next
.
Enter the remote LAN IP address and subnet mask of the remote gateway.
If this information does not match the LAN IP address and subnet mask in the remote
gateway, the secure tunnel fails to connect.
The IP address range used on the remote LAN has to be different from the IP address
range used on the local LAN.
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5.
Click
Next
.
This screen shows the summary of the Wizard configuration with a link to view the VPNC
recommended parameters (click the
here
link to view the VPNC-recommended
parameters).
6.
Click
Done
.
For information about how to add or modify VPN policies, see
VPN Policies
on page 135.
Setup Menu
Select
ADVANCED > Setup
to display the Setup menu.
The following selections are available:
Internet Setup
. This selection is a shortcut to the same Internet Setup screen that you
can access from the dashboard on the BASIC Home screen. See
Internet Basic Settings
on page 30.
ADSL Setup
. Internet (ADSL) setup. See
ADSL Setup
on page 48.
Wireless Setup
. This selection is a shortcut to the same Wireless Settings screen that
you can access from the dashboard on the BASIC Home screen. See
Basic Wireless
Settings
on page 33.
WAN Setup
. Internet (WAN) setup. See
WAN Setup
on page 49.
LAN Setup
. Local area network (LAN) setup. See
LAN Setup
on page 52.
QoS Setup
. Quality of Service (QoS) setup. See
Quality of Service Setup
on page 56.
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Guest Network
. This selection is a shortcut to the same Wireless Settings (for guest
networks) screen that you can access from the dashboard on the BASIC Home screen.
See
Guest Networks
on page 37.
ADSL Setup
The ADSL Settings screen lets you configure the multiplexing method and virtual circuit of
your ADSL connection. The default parameters should match those on the system used by
your ISP.
To configure ADSL:
1.
Select
ADVANCED > Setup > ADSL Settings
.
2.
Configure the following settings:
Multiplexing Method
. Your ISP indicates whether your multiplexing method is
VC-BASED or LLC-BASED.
VPI
,
VCI
. Your ISP indicates which VPI and VCI combination is used for your service.
DSL Mode
. Your ISP indicates that the best setting is used for your DSL connection.
3.
Click
Apply
.
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WAN Setup
The WAN Setup screen lets you configure the WAN (Internet) port.
To configure the WAN:
1.
Select
ADVANCED > Setup > WAN Setup
.
2.
Configure the following settings:
WAN Preference
. Select your WAN preference: Auto Detect, Must use DSL WAN, or
Must use Ethernet WAN.
Disable Port Scan and DoS Protection
. DoS protection protects your LAN against
denial of service attacks such as Syn flood, Smurf Attack, Ping of Death, Teardrop
Attack, UDP Flood, ARP Attack, Spoofing ICMP, Null Scan, and many others. This
feature should be disabled only in special circumstances.
Default DMZ Server
. This feature is sometimes helpful when you are playing online
games or videoconferencing. Be careful when using this feature because it makes the
firewall security less effective. For more information, see
Default DMZ Server
on
page 50.
Respond to Ping on Internet Port
. If you want the WiFi DSL modem router to
respond to a ping from the Internet, select this check box. Use this feature only as a
diagnostic tool because it allows your WiFi DSL modem router to be discovered. Do
not select this check box unless you have a specific reason.
MTU Size (in bytes)
. The normal MTU (maximum transmit unit) value for most
Ethernet networks is 1500 bytes, or 1492 bytes for PPPoE connections. For some
ISPs, you might need to reduce the MTU. This change is rarely required, and should
not be done unless you are sure that it is necessary for your ISP connection. See
Change the MTU Size
on page 51.
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Disable IGMP Proxying
. The IGMP proxying function lets a LAN computer receive
the multicast traffic it is interested in from the Internet. Select this check box to disable
the function if you do not need it.
NAT Filtering
. Network Address Translation (NAT) determines how the WiFi DSL
modem router processes inbound traffic. Secured NAT provides a secured firewall to
protect the computers on the LAN from attacks from the Internet, but might prevent
some Internet games, point-to-point applications, or multimedia applications from
functioning. Open NAT provides a much less secured firewall, but allows almost all
Internet applications to function.
Disable SIP ALG
. Some VoIP applications do not work well with the SIP ALG.
Selecting this check box to turn off the SIP ALG might help your VoIP devices to
create or accept a call through the router.
3.
Click
Apply
.
Default DMZ Server
The default DMZ server feature is helpful when you are using some online games and
videoconferencing applications that are incompatible with Network Address Translation
(NAT). The WiFi DSL modem router is programmed to recognize some of these applications
and to work correctly with them, but other applications might not function well. In some cases,
one local computer can run the application correctly if that computer’s IP address is entered
as the default DMZ server.
WARNING:
DMZ servers pose a security risk. A computer designated as the
default DMZ server loses much of the protection of the firewall and
is exposed to exploits from the Internet. If compromised, the DMZ
server computer can be used to attack other computers on your
network.
Incoming traffic from the Internet is discarded by the WiFi DSL modem router unless the
traffic is a response to one of your local computers or a service that you have configured in
the Port Forwarding/Port Triggering screen. Instead of discarding this traffic, you can forward
it to one computer on your network. This computer is called the default DMZ server.
To set up a default DMZ server:
1.
Select
ADVANCED > Setup > WAN Setup
.
2.
Select the
Default DMZ Server
check box.
3.
Type the IP address.
4.
Click
Apply
.

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