D-Link DSL-2680 Router Manual PDF (Setup & Configuration Guide)

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47

D-Link DSL-2680 User Manual

Chapter 4 - Advanced Setup

Firewall & DMZ

Use the

Firewall & DMZ

menu to enable or disable basic ﬁrewall protection from Denial of Service and other attacks from the WAN.

Firewall Settings

Enable the Firewall to block Denial of Service attacks, ﬂood pings, port scans and

other common exploitative attacks that might come from the Internet. This is enabled

by default. To disable it, click the Enable Firewall box to remove the check mark

and click the

Apply Setting

s button.

DMZ Settings

Firewalls may conﬂict with certain interactive applications such as video conferencing

or playing Internet video games. For these applications, a ﬁrewall bypass can be set

up using a DMZ IP address. The DMZ IP address is a “visible” address and does not

beneﬁt from the full protection of the ﬁrewall function. Therefore it is advisable that

other security precautions be enabled to protect the other computers and devices

on the LAN. It may be wise to use isolate the device with the DMZ IP address from

the rest of the LAN.

For example, if you want to use video conferencing and still use a ﬁrewall, you can

place the server in the DMZ. The IP address of this server will then be the DMZ IP

address. You can designate the server’s IP address as the DMZ by typing in the

IP address in the

DMZ IP Address

space provided and then enabling its status by

selecting the

Enable DMZ

option. Click the

Apply Settings

button at the bottom

of the window when you are ﬁnished.

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48

D-Link DSL-2680 User Manual

Chapter 4 - Advanced Setup

Advanced ADSL

ADSL modulation is conﬁgured in the

Advanced ADSL

menu. The default setting automatically detects the appropriate modulation for the connection, therefore it

should not be necessary to change this setting for the Router to function.

Modulation types supported by the Router include:

ADSL2

,

ADSL2+

,

G.DMT

T1.143

and

G.lite

. If the

Modulation Mode

is changed from the default

Auto Synch-Up

, the

mode used must be supported by the ISP in order for the ADSL signal to function.

Likewise for changing the ANNEX type, if the

Type

used is not supported by the

ISP in your region, the ADSL signal will not function.

The

Bitswap

and

SRA

(Seamless Rate Adaptation) features can be enabled here.

If your ADSL modulation is ADSL2 or ADSL2+, these features will only be useful if

supported by the ISP. If you opt to use either of these, some experimentation might

be advisable to test ADSL synchronization and signal performance for improvement

or degradation.

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D-Link DSL-2680 User Manual

Chapter 4 - Advanced Setup

Advanced Wireless

Advanced Wireless settings are used to tweak various wireless transmission parameters and to enable an additional SSID or Guest SSID.

Transmit Power

Allows the user to adjust the transmit power of the router. A high transmit power

allows a greater area range of accessibility to the router. When multiple overlapping

access points are present, it may be desirable to reduce transmission power.

Bandwidth

Select the desired bandwidth. Toggle between

Up to 65Mbps

and

Up to 135Mbps

.

MCS

Select the MCS, between

0

and

15

, or use

Auto

.

Fragmentation Threshold

The fragmentation threshold will determine if packets are to be fragmented. Packets

over the 2346 byte limit will be fragmented before transmission.

2346

is the default

setting.

RTS Threshold

The RTS (Request to Send) Threshold controls the size of data packets issued to

a RTS packet. A lower level will send packets more frequently which may consume

a great amount of the available bandwidth. A high threshold will allow the router to

recover from interference or collisions which is more prevalent in a network with

high trafﬁc or high electromagnetic interference. The default setting is

2347

.

DTIM Interval

DTIM (Delivery Trafﬁc Indication Message) Interval is a countdown informing clients

of the next menu for listening to broadcast and multicast messages. The default

setting is

1

.

Beacon Period

Beacons are emitted from the router in order to synchronize the wireless network.

You may set the Beacon Interval range between 20 and 1000 microseconds per

beacon sent. The default is

100

.

Click the

Apply Settings

button to save and apply the advanced wireless

conﬁguration settings.

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D-Link DSL-2680 User Manual

Chapter 4 - Advanced Setup

Wi-Fi Protected Setup

Use the

Wi-Fi Protected Setup

(WPS) menu to enable or disable WPS, lock the current settings, remove the current WPS settings, reset the PIN to the default value

or generate a new PIN code. To add a WPS wireless client, click the Add Wireless Device with WPS button and follow the procedure as described in Add Wireless

Clients with WPS.

Enable

Left-click on this box to enable WPS, a check mark indicates WPS is enabled. Click

to remove the check mark to disable WPS.

Lock Wireless Security Settings

Left-click on this box to lock the current wireless security settings.

Current PIN

This is the PIN used by WPS supporting clients to establish the WPS connection.

This is done either by using the wireless client to generate the PIN, then entering

the client generated PIN into the access point (the router). This ﬁrst method is

generally the preferred method since many WPS enabled wireless clients do not

include the ability to enter a PIN generated by another system. Alternatively, the

access point (the router) is used to generate the PIN and this is entered into the

WPS enabled wireless client.

The router’s PIN used to establish WPS connections to other WPS enabled wireless

devices.

Reset PIN to Default

Click on this button to reset the router’s PIN to the factory default setting.

Generate New PIN

Click on this button to generate a new PIN for the router.

Add Wireless Device with WPS

Click on this button to go to the

WPS (Wi-Fi Protected Setup) Wizard

menu.

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D-Link DSL-2680 User Manual

Chapter 4 - Advanced Setup

Wireless MAC Filter

Use the

Wireless MAC Filter

menu to designate MAC addresses that are denied access or allowed access to the wireless LAN through the device.

Up to eight MAC addresses can be listed with the MAC Filter. It is important to

understand that when the MAC ﬁlter is activated there are two options for the rule

or

Action

used for the listed MAC addresses. When the

Status

is

Activated

, the

administrator must choose one of the following:

y

Allow Association

to the listed MAC addresses (and deny all

other MAC addresses to associate).

y

Deny Association

to the listed MAC addresses (and allow

association to others not on the list).

To use Wireless MAC Filters,

1.

Select the

Activated

option for

Status

.

2.

Choose the

Action

to either

Allow Association

or

Deny Association

of the listed MAC addresses.

3.

Type the MAC addresses effected by the chosen Action in the

standard MAC address format.

4.

Click on the

Apply Settings

button.

When activated the ﬁlter rule becomes effective immediately. The MAC ﬁlter rule

can be deactivated by selecting the

Deactivated

option for Status. Deactivating

MAC ﬁlters will not change any MAC addresses entered on the list.

.

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