DVG-N5402SP

User’s Manual

MAINTENANCE

D-Link Systems, Inc.

18

3-2-1-5 DHCP Filtering

DHCP Filtering is used to control network access based on the IP address of the network device. It is used

to deny network or Internet access.

ADVANCED

→

Parental Control

→

DHCP Filtering

Enable DHCP Filter:

Enable or disable the DHCP filtering function.

ADVANCED

→

Firewall and DMZ

→

DHCP Filtering

WHITE LIST:

Bind the static IP address with the specified MAC address. If the MAC address of the device

on the LAN consists with the specified MAC address, the VoIP Router assigns the binding IP address.

IP:

Enter the binding IP address.

MAC:

Enter the binding MAC address.

DVG-N5402SP

User’s Manual

MAINTENANCE

D-Link Systems, Inc.

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ADVANCED

→

Firewall and DMZ

→

DHCP Filtering

BLACK LIST:

If the MAC address of the device on the LAN, the VoIP Router does not assign the IP

address.

MAC:

Enter the MAC address of the device on the LAN.

3-2-2 Firewall and DMZ

3-2-2-1 DMZ

DMZ (Demilitarized Zone) allows the server on the LAN site to be directly exposed to the Internet for

accessing data and to forward all incoming ports to the DMZ Host. Adding a client to the DMZ may expose

that computer to a variety of security risks; so only use this option as a last resort.

ADVANCED

→

Firewall and DMZ

→

DMZ

DVG-N5402SP

User’s Manual

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Enable DMZ:

Check the box to enable DMZ feature.

WAN Connection:

Select the WAN port that enables DMZ from the drop-down list. Users can access the

DMZ host that is provided by this WAN connection through Internet access.

DMZ Host IP Address:

Enter the IP address of that computer as a DMZ Host with unrestricted Internet

access.

Note:

Either this function or virtual server can be selected for use in accessing external services.

3-2-2-2 Dos Protection

ADVANCED

→

Firewall and DMZ

→

Dos Protection

Enable Attack Prevent:

Check the box to prevent DoS attacks from WAN or LAN. There are various types

of DoS attacking. Leave settings in this field to the default if you are not familiar with it.

DVG-N5402SP

User’s Manual

MAINTENANCE

D-Link Systems, Inc.

21

3-2-2-3 Virtual Server

Enable users on Internet to access the WWW, FTP and other services from your NAT. It is also known as

port forwarding. When remote users are accessing Web or FTP servers through WAN IP address, it will be

routed to the server with LAN IP address.

ADVANCED

→

Firewall and DMZ

→

Virtual Server

WAN Connection (s):

Select the WAN interface for the Internet connection. Users can access the virtual

server through the WAN connection.

WAN Port Range:

Enter the port range for the WAN side.

TCP/UDP:

Select the communication protocols used by the server,

TCP

,

UDP

or

Both

.

LAN Host IP Address:

Enter the IP address of the device that provides various services.

Server Port Range:

Enter comments.

Remark:

Enter comments.

DVG-N5402SP

User’s Manual

MAINTENANCE

D-Link Systems, Inc.

22

3-2-3 Advanced Wireless

3-2-3-1 Advanced

This section introduces advanced configuration of the wireless access point. If you are not familiar with the

following functions, keep the default parameters. In some cases, incorrect settings may reduce wireless

performance.

ADVANCED

→

Advanced Wireless

→

Advanced

Transmission Rate:

You can select it from the drop-down list. Auto rate changes automatically to get

better throughput depending on the range and environment of

the

wireless network.

Transmit Power:

You can adjust the percentage of power 100, 80, 60, 40, 20 of your VoIP Router to

change the coverage of wireless network. Keep the default value, 100% to reach full range.

Beacon Period:

It

indicates the frequency interval of target beacon transmission time which can be found

in a packet body. The VoIP Router transmits the beacon packet to help a wireless client to identify the

existence of nearby AP (Access Point). If the beacon intervals are too long, it would be hard to access the

network. If the beacon intervals are too short, the resources would be wasted. The default value is

100

.

RTS Threshold:

It is a mechanism to implement in collision avoidance. In a large wireless network, two

stations do not hear each other but can hear wireless access point. When the two send data to AP (Access

Point) at the same time, it may result in data collision and a loss of messages for both wireless stations. In

most case, it is recommended to keep the default value:2347.

Fragmentation Threshold:

A packet can be fragmented into small units to pass over a network medium

that can not support the original packet size. If you encounter a busy network, a lower value of fragment

threshold could improve performance. If the traffic flows are not very busy, a higher fragment threshold

provides good network performance. In most case, it is recommended to keep the default value: 2346.