D-Link DIR-855 User Manual
Preface
D-Link reserves the right to revise this publication and to make changes in the content hereof without obligation to
notify any person or organization of such revisions or changes.
Manual Revisions
Revision Date Description
1.0 November 13, 2007 DIR-855 A2 Revision A1 with Firmware 1.10
1.1 April 23, 2008 Updated warranty information
Trademarks
D-Link and the D-Link logo are trademarks or registered trademarks of D-Link Corporation or its subsidiaries in the
United States or other countries. All other company or product names mentioned herein are trademarks or registered
trademarks of their respective companies.
Copyright © 2008 by D-Link Systems, Inc.
All rights reserved. This publication may not be reproduced, in whole or in part, without prior expressed written permission
from D-Link Systems, Inc.
iD-Link DIR-855 User Manual
Table of Contents
Table of Contents
Preface...........................................................................i
Manual Revisions ..................................................... i
Trademarks .............................................................. i
Product Overview ........................................................1
Package Contents ...................................................1
System Requirements .............................................2
Introduction ..............................................................3
Features ..................................................................4
Hardware Overview ................................................. 5
Connections .......................................................5
LEDs ..................................................................6
Installation ....................................................................7
Before you Begin ..................................................... 7
Wireless Installation Considerations ........................ 8
Network Diagram ..................................................... 9
Connect to Cable/DSL/Satellite Modem ................ 10
Connect to Another Router .................................... 11
Getting Started ......................................................13
Conguration ............................................................. 14
Web-based Conguration Utility ............................ 14
Setup Wizard ...................................................15
Manual Conguration ....................................... 19
Dynamic (Cable) ..........................................19
PPPoE (DSL) ............................................... 20
PPTP ............................................................21
L2TP ............................................................. 23
Static (assigned by ISP) ...............................25
Wireless Settings ............................................. 26
802.11n/g (2.4GHz) ...................................... 26
802.11n/a (5GHz) ......................................... 28
Network Settings .............................................. 30
LAN Settings ................................................ 30
DHCP Server Settings .................................31
DHCP Reservation .......................................32
Virtual Server ...................................................33
Port Forwarding ...............................................35
Application Rules .............................................36
QoS Engine .....................................................37
Network Filters .................................................38
Access Control ................................................. 39
Access Control Wizard .................................39
Website Filters ................................................. 42
Inbound Filters .................................................43
Firewall Settings ..............................................44
Application Level Gateway (ALG)
Conguration ...................................................45
Router Settings ................................................46
Advanced Wireless Settings ............................ 47
802.11n/g (2.4GHz) ...................................... 47
802.11n/a (5GHz) ......................................... 48
WISH Settings .................................................49
Advanced Network Settings ............................. 51
iiD-Link DIR-855 User Manual
Table of Contents
UPnP ............................................................51
Internet Ping Block ....................................... 51
Internet Port Speed ...................................... 51
Multicast Streams ......................................... 51
Administrator Settings ...................................... 52
Change Password ........................................52
Remote Management ................................... 52
Time Settings ...................................................53
SysLog .............................................................54
Email Settings ..................................................55
System Settings ...............................................56
Update Firmware .............................................57
DDNS ............................................................... 58
System Check .................................................. 59
Schedules ........................................................60
Device Information ...........................................61
Log ...................................................................62
Stats ................................................................. 63
Connect to a Wireless Network ................................ 74
Using Windows Vista® ...........................................74
Congure Wireless Security ............................75
Connect Using WCN 2.0 in Windows Vista® ......... 77
Using Windows® XP ............................................... 78
Congure WPA-PSK ........................................ 79
Troubleshooting ........................................................ 81
Wireless Basics ......................................................... 85
What is Wireless? .................................................. 86
Tips ........................................................................88
Wireless Modes ..................................................... 89
Networking Basics ....................................................90
Check your IP address ..........................................90
Statically Assign an IP address .............................91
Technical Specications........................................... 92
Internet Sessions ............................................. 64
Wireless ...........................................................65
WISH ...............................................................65
Support ............................................................66
Wireless Security.......................................................67
What is WPA? .......................................................67
Wireless Security Setup Wizard ............................68
Add Wireless Device with WPS Wizard ................. 70
Congure WPA-Personal (PSK) ............................ 71
Congure WPA-Enterprise (RADIUS) ...................72
iiiD-Link DIR-855 User Manual
Section 1 - Product Overview
Product Overview
Package Contents
D-Link DIR-855 Media Router
Power Adapter
Ethernet Cable
CD-ROM
Stand
Note: Using a power supply with a different voltage rating than the one included with the DIR-855 will cause damage and void the warranty for this
product.
1D-Link DIR-855 User Manual
Section 1 - Product Overview
System Requirements
Network Requirements
Web-based Conguration
Utility Requirements
• An Ethernet-based Cable or DSL modem
• IEEE 802.11n-draft or 802.11g wireless clients
• IEEE 802.11a wireless clients
• 10/100/1000 Ethernet
Computer with the following:
• Windows®, Macintosh, or Linux-based operating
system
• An installed Ethernet adapter
Browser Requirements:
• Internet Explorer 6.0 or higher
• Mozilla 1.7.12 or higher
• Firefox 1.5 or higher
• Safari 3.0 or higher (with Java 1.3.1 or higher)
• Flock 0.7.14 or higher
• Opera 6.0 or higher
CD Installation Wizard
Requirements
Windows® Users: Make sure you have the latest version
of Java installed. Visit www.java.com to download the
latest version.
Computer with the following:
• Windows® XP with Service Pack 2 or Vista
• An installed Ethernet adapter
• CD-ROM drive
®
2D-Link DIR-855 User Manual
Section 1 - Product Overview
Introduction
TOTAL PERFORMANCE
Combines award winning router features and IEEE 802.11a/Draft 802.11n wireless technology to provide the best wireless
performance
TOTAL SECURITY
The most complete set of security features including Active Firewall and WPA2 to protect your network against outside
intruders
TOTAL COVERAGE
Provides greater wireless signal rates even at farther distances for best-in-class Whole Home Coverage.
ULTIMATE PERFORMANCE
The D-Link Wireless N Quadband Gigabit router (DIR-855) is a draft 802.11n/802.11a compliant device that delivers real world
performance of up to 14x faster than an 802.11g wireless connection (also faster than a 100Mbps wired Ethernet connection).
Create a secure wireless network to share photos, les, music, video, printers, and network storage throughout your home.
Connect the DIR-855 router to a cable or DSL modem and share your high-speed Internet access with everyone on the network.
In addition, this Router includes a Quality of Service (QoS) engine that keeps digital phone calls (VoIP) and online gaming
smooth and responsive, providing a better Internet experience.
EXTENDED WHOLE HOME COVERAGE
Powered by Wireless N Quadband technology, this high performance router provides superior Whole Home Coverage while
reducing dead spots. The router is designed for use in bigger homes and for users who demand higher performance networking.
Add a Wireless N notebook or desktop adapter and stay connected to your network from virtually anywhere in your home.
TOTAL NETWORK SECURITY
The Wireless N Quadband router supports all of the latest wireless security features to prevent unauthorized access, be it from
over the wireless network or from the Internet. Support for WPA and WEP standards ensure that you’ll be able to use the best
possible encryption method, regardless of your client devices. In addition, this router utilizes dual active rewalls (SPI and NAT)
to prevent potential attacks from across the Internet.
* Maximum wireless signal rate derived from IEEE Standard 802.11a, 802.11g and Draft 802.11n specications. Actual data throughput will vary. Network conditions and
environmental factors, including volume of network trafc, building materials and construction, and network overhead, lower actual data throughput rate. Environmental
conditions will adversely affect wireless signal range.
3D-Link DIR-855 User Manual
Section 1 - Product Overview
• Faster Wireless Networking - The DIR-855 provides up to 300Mbps* wireless connection with other
802.11n wireless clients. This capability allows users to participate in real-time activities online, such as
video streaming, online gaming, and real-time audio. The performance of this 802.11n wireless router
gives you the freedom of wireless networking at speeds 650% faster than 802.11g.
Features
• Compatible with 802.11a/g Devices
and 802.11a standards, so it can connect with existing 802.11g and 802.11a PCI, USB, and Cardbus
adapters.
• Advanced Firewall Features
management features including:
• Content Filtering - Easily applied content ltering based on MAC Address, URL, and/or
Domain Name.
• Filter Scheduling - These lters can be scheduled to be active on certain days or for a
duration of hours or minutes.
• Secure Multiple/Concurrent Sessions - The DIR-855 can pass through VPN sessions. It
supports multiple and concurrent IPSec and PPTP sessions, so users behind the DIR-855
can securely access corporate networks.
• User-friendly Setup Wizard - Through its easy-to-use Web-based user interface, the DIR-855 lets you
control what information is accessible to those on the wireless network, whether from the Internet or from
your company’s server. Congure your router to your specic settings within minutes.
- The Web-based user interface displays a number of advanced network
- The DIR-855 is still fully compatible with the IEEE 802.11g
* Maximum wireless signal rate derived from IEEE Standard 802.11g, 802.11a, and Draft 802.11n specications. Actual data throughput will vary. Network conditions
and environmental factors, including volume of network trafc, building materials and construction, and network overhead, lower actual data throughput rate.
Environmental conditions will adversely affect wireless signal range.
4D-Link DIR-855 User Manual
Section 1 - Product Overview
Hardware Overview
Connections
USB
Connect a USB 1.1 or 2.0 ash
drive to congure the wireless
settings using WCN.
Reset
Pressing the Reset button restores the router to
its original factory default settings.
LAN Ports (1-4)
Connect Ethernet devices such as
computers, switches, and hubs.
Internet Port
The auto MDI/MDIX Internet port is
the connection for the Ethernet cable
to the cable or DSL modem.
Power Receptor
Receptor for the supplied power
adapter.
5D-Link DIR-855 User Manual
Section 1 - Product Overview
Hardware Overview
LEDs
2 3 4 651
Power LED
A solid light indicates a
proper connection to the
power supply.
OLED Screen
Displays information
regarding the router.
OLED Screen
1 WAN Displays Internet connectivity.
2 Menu Select to display the OLED main menu.
3 Performance
4 WPS Displays the WPS status.
5 Date/Time Displays the routers date and time.
6 DHCP Displays the DHCP status.
Select to display statistics of the LAN, WAN,
and wireless connections.
6D-Link DIR-855 User Manual
Section 2 - Installation
Installation
This section will walk you through the installation process. Placement of the router is very important. Do not place the
router in an enclosed area such as a closet, cabinet, or in the attic or garage.
Before you Begin
• Please congure the router with the computer that was last connected directly to your modem.
• You can only use the Ethernet port on your modem. If you were using the USB connection before using
the router, then you must turn off your modem, disconnect the USB cable and connect an Ethernet cable
to the Internet port on the router, and then turn the modem back on. In some cases, you may need to
call your ISP to change connection types (USB to Ethernet).
• If you have DSL and are connecting via PPPoE, make sure you disable or uninstall any PPPoE software
such as WinPoet, Broadjump, or Enternet 300 from your computer or you will not be able to connect to
the Internet.
• When running the Setup Wizard from the D-Link CD, make sure the computer you are running the CD
from is connected to the Internet and online or the wizard will not work. If you have disconnected any
hardware, re-connect your computer back to the modem and make sure you are online.
7D-Link DIR-855 User Manual
Section 2 - Installation
Wireless Installation Considerations
The D-Link wireless router lets you access your network using a wireless connection from virtually anywhere within
the operating range of your wireless network. Keep in mind, however, that the number, thickness and location of
walls, ceilings, or other objects that the wireless signals must pass through, may limit the range. Typical ranges vary
depending on the types of materials and background RF (radio frequency) noise in your home or business. The key
to maximizing wireless range is to follow these basic guidelines:
1. Keep the number of walls and ceilings between the D-Link router and other network devices to a
minimum - each wall or ceiling can reduce your adapter’s range from 3-90 feet (1-30 meters.) Position
your devices so that the number of walls or ceilings is minimized.
2. Be aware of the direct line between network devices. A wall that is 1.5 feet thick (.5 meters), at a
45-degree angle appears to be almost 3 feet (1 meter) thick. At a 2-degree angle it looks over 42 feet
(14 meters) thick! Position devices so that the signal will travel straight through a wall or ceiling (instead
of at an angle) for better reception.
3. Building Materials make a difference. A solid metal door or aluminum studs may have a negative effect on
range. Try to position access points, wireless routers, and computers so that the signal passes through
drywall or open doorways. Materials and objects such as glass, steel, metal, walls with insulation, water
(sh tanks), mirrors, le cabinets, brick, and concrete will degrade your wireless signal.
4. Keep your product away (at least 3-6 feet or 1-2 meters) from electrical devices or appliances that
generate RF noise.
5. If you are using 2.4GHz cordless phones or X-10 (wireless products such as ceiling fans, lights, and
home security systems), your wireless connection may degrade dramatically or drop completely. Make
sure your 2.4GHz phone base is as far away from your wireless devices as possible. The base transmits
a signal even if the phone in not in use.
8D-Link DIR-855 User Manual
Section 2 - Installation
Network Diagram
9D-Link DIR-855 User Manual
Section 2 - Installation
Connect to Cable/DSL/Satellite Modem
If you are connecting the router to a cable/DSL/satellite modem, please follow the steps below:
1. Place the router in an open and central location. Do not plug the power adapter into the router.
2. Turn the power off on your modem. If there is no on/off switch, then unplug the modem’s power adapter.
Shut down your computer.
3. Unplug the Ethernet cable (that connects your computer to your modem) from your computer and place
it into the Internet port on the router.
4. Plug an Ethernet cable into one of the four LAN ports on the router. Plug the other end into the Ethernet
port on your computer.
5. Turn on or plug in your modem. Wait for the modem to boot (about 30 seconds).
6. Plug the power adapter to the router and connect to an outlet or power strip. Wait about 30 seconds for
the router to boot.
7. Turn on your computer.
8. Refer to page 13 to congure your router.
10D-Link DIR-855 User Manual
Section 2 - Installation
Connect to Another Router
If you are connecting the D-Link router to another router to use as a wireless access point and/or switch, you will have
to do the following before connecting the router to your network:
• Disable UPnP
• Disable DHCP
• Change the LAN IP address to an available address on your network. The LAN ports on the router cannot
accept a DHCP address from your other router.
To connect to another router, please follow the steps below:
1. Plug the power into the router. Connect one of your computers to the router (LAN port) using an Ethernet cable.
Make sure your IP address on the computer is 192.168.0.xxx (where xxx is between 2 and 254). Please see the
Networking Basics section for more information. If you need to change the settings, write down your existing settings
before making any changes. In most cases, your computer should be set to receive an IP address automatically in
which case you will not have to do anything to your computer.
2. Open a web browser and enter http://dlinkrouter or http://192.168.0.1 and press Enter. When the login window
appears, set the user name to Admin and leave the password box empty. Click Log In to continue.
3. Click on Advanced and then click Advanced Network. Uncheck the Enable UPnP checkbox. Click Save Settings
to continue.
™
4. Click Setup and then click Network Settings. Uncheck the Enable DHCP Server checkbox. Click Save Settings
to continue.
5. Under Router Settings, enter an available IP address and the subnet mask of your network. Click Save Settings to
save your settings. Use this new IP address to access the conguration utility of the router in the future. Close the
browser and change your computer’s IP settings back to the original values as in Step 1.
11D-Link DIR-855 User Manual
Section 2 - Installation
6. Disconnect the Ethernet cable from the router and reconnect your computer to your network.
7. Connect an Ethernet cable in one of the LAN ports of the router and connect it to your other router. Do not plug
anything into the Internet port of the D-Link router.
8. You may now use the other 3 LAN ports to connect other Ethernet devices and computers. To congure your wireless
network, open a web browser and enter the IP address you assigned to the router. Refer to the Conguration and
Wireless Security sections for more information on setting up your wireless network.
12D-Link DIR-855 User Manual
Section 2 - Installation
Getting Started
The DIR-855 includes a Quick Router Setup Wizard CD. Follow the simple steps below to run the Setup Wizard to
guide you quickly through the installation process.
Insert the Quick Router Setup Wizard CD in the CD-ROM drive. The step-by-step instructions that follow are shown
in Windows® XP. The steps and screens are similar for the other Windows operating systems.
If the CD Autorun function does not automatically start on your computer, go to Start > Run. In the run box type
“D:\DIR855.exe” (where D: represents the drive letter of your CD-ROM drive).
When the autorun screen appears, click Start.
Click Start
Note: It is reccomended to write down the SSID and Security Key, followed by the login password on the provided CD
holder.
13D-Link DIR-855 User Manual
Section 3 - Configuration
Configuration
This section will show you how to congure your new D-Link wireless router using the web-based conguration
utility.
Web-based Configuration Utility
To access the conguration utility, open a web-browser
such as Internet Explorer and enter http://dlinkrouter or
http://192.168.0.1
Select Admin from the drop-down menu and then enter
your password. Leave the password blank by default.
If you get a Page Cannot be Displayed error, please
refer to the Troubleshooting section for assistance.
14D-Link DIR-855 User Manual
Section 3 - Configuration
Setup Wizard
Click Launch Internet Connection Setup Wizard to begin.
If you want to enter your settings without running the wizard, click
Manual Conguration and skip to page 19.
Click Next to continue.
Create a new password and then click Next to continue.
15D-Link DIR-855 User Manual
Section 3 - Configuration
Select your time zone from the drop-down menu and then click Next to
continue.
Select the type of Internet connection you use and then click Next to
continue.
If you selected Dynamic, you may need to enter the MAC address of
the computer that was last connected directly to your modem. If you are
currently using that computer, click Clone Your PC’s MAC Address
and then click Next to continue.
The Host Name is optional but may be required by some ISPs. The default
host name is the device name of the router and may be changed.
16D-Link DIR-855 User Manual
Section 3 - Configuration
If you selected PPPoE, enter your PPPoE username and password. Click
Next to continue.
Select Static if your ISP assigned you the IP address, subnet mask,
gateway, and DNS server addresses.
Note: Make sure to remove your PPPoE software from your computer. The
software is no longer needed and will not work through a router.
If you selected PPTP, enter your PPTP username and password. Click
Next to continue.
If you selected L2TP, enter your L2TP username and password. Click Next
to continue.
17D-Link DIR-855 User Manual
Section 3 - Configuration
If you selected Static, enter your network settings supplied by your Internet
provider. Click Next to continue.
Click Connect to save your settings. Once the router is nished rebooting,
click Continue. Please allow 1-2 minutes to connect.
Close your browser window and reopen it to test your Internet connection.
It may take a few tries to initially connect to the Internet.
18D-Link DIR-855 User Manual
Section 3 - Configuration
Manual Configuration
Dynamic (Cable)
My Internet
Connection:
Host Name:
Use Unicasting:
DNS Addresses:
MTU:
MAC Address:
Select Dynamic IP (DHCP) to obtain IP Address
information automatically from your ISP. Select
this option if your ISP does not give you any IP
numbers to use. This option is commonly used
for Cable modem services.
The Host Name is optional but may be required
by some ISPs.
Check the box if you are having problems
obtaining an IP address from your ISP.
Enter the Primary DNS server IP address
assigned by your ISP.
Maximum Transmission Unit - you may need to
change the MTU for optimal performance with
your specic ISP. 1500 is the default MTU.
The default MAC Address is set to the Internet
port’s physical interface MAC address on the
Broadband Router. It is not recommended that
you change the default MAC address unless
required by your ISP. You can use the Clone
Your PC’s MAC Address button to replace
the Internet port’s MAC address with the MAC
address of your Ethernet card.
19D-Link DIR-855 User Manual
Section 3 - Configuration
Internet Setup
PPPoE (DSL)
Choose PPPoE (Point to Point Protocol over Ethernet) if your ISP uses a PPPoE connection. Your ISP will provide
you with a username and password. This option is typically used for DSL services. Make sure to remove your PPPoE
software from your computer. The software is no longer needed and will not work through a router.
My Internet
Connection:
Address Mode:
IP Address:
User Name:
Password:
Service Name:
Reconnection Mode:
Maximum Idle
Time:
DNS Addresses:
Select PPPoE (Username/Password) from the drop-down menu.
Select Static if your ISP assigned you the IP address, subnet mask,
gateway, and DNS server addresses. In most cases, select Dynamic.
Enter the IP address (Static PPPoE only).
Enter your PPPoE user name.
Enter your PPPoE password and then retype the password in the next
box.
Enter the ISP Service Name (optional).
Select either Always-on, On-Demand, or Manual.
Enter the Primary and Secondary DNS Server Addresses (Static PPPoE
only).
Enter a maximum idle time during which the Internet connection is maintained during inactivity. To disable this feature,
enable Auto-reconnect.
MTU:
MAC Address:
Maximum Transmission Unit - you may need to change the MTU for optimal performance with your specic ISP. 1492 is
the default MTU.
The default MAC Address is set to the Internet port’s physical interface MAC address on the Broadband Router. It is not
recommended that you change the default MAC address unless required by your ISP. You can use the Clone Your PC’s
MAC Address button to replace the Internet port’s MAC address with the MAC address of your Ethernet card.
20D-Link DIR-855 User Manual
Section 3 - Configuration
Internet Setup
PPTP
Choose PPTP (Point-to-Point-Tunneling Protocol ) if your ISP uses a PPTP connection. Your ISP will provide you with
a username and password. This option is typically used for DSL services.
Address Mode:
PPTP IP Address:
PPTP Subnet Mask:
PPTP Gateway:
PPTP Server IP:
Username:
Password:
Reconnect Mode:
Select Static if your ISP assigned you the IP
address, subnet mask, gateway, and DNS server
addresses. In most cases, select Dynamic.
Enter the IP address (Static PPTP only).
Enter the Primary and Secondary DNS Server
Addresses (Static PPTP only).
Enter the Gateway IP Address provided by your
ISP.
Enter the Server IP provided by your ISP
(optional).
Enter your PPTP username.
Enter your PPTP password and then retype the
password in the next box.
Select either Always-on, On-Demand, or
Manual.
Maximum Idle Time:
Enter a maximum idle time during which the
Internet connection is maintained during inactivity. To disable this feature, enable Auto-reconnect.
21D-Link DIR-855 User Manual
Section 3 - Configuration
DNS Servers:
MTU:
MAC Address:
The DNS server information will be supplied by your ISP (Internet Service Provider.)
Maximum Transmission Unit - you may need to change the MTU for optimal performance with your specic ISP. 1400 is
the default MTU.
The default MAC Address is set to the Internet port’s physical interface MAC address on the Broadband Router. It is not
recommended that you change the default MAC address unless required by your ISP. You can use the Clone Your PC’s
MAC Address button to replace the Internet port’s MAC address with the MAC address of your Ethernet card.
22D-Link DIR-855 User Manual
Section 3 - Configuration
Internet Setup
L2TP
Choose L2TP (Layer 2 Tunneling Protocol) if your ISP uses a L2TP connection. Your ISP will provide you with a
username and password. This option is typically used for DSL services.
Address Mode:
L2TP IP Address:
L2TP Subnet Mask:
L2TP Gateway:
L2TP Server IP:
Username:
Password:
Reconnect Mode:
Maximum Idle Time:
Select Static if your ISP assigned you the IP address, subnet
mask, gateway, and DNS server addresses. In most cases,
select Dynamic.
Enter the L2TP IP address supplied by your ISP (Static
only).
Enter the Subnet Mask supplied by your ISP (Static only).
Enter the Gateway IP Address provided by your ISP.
Enter the Server IP provided by your ISP (optional).
Enter your L2TP username.
Enter your L2TP password and then retype the password
in the next box.
Select either Always-on, On-Demand, or Manual.
Enter a maximum idle time during which the Internet
connection is maintained during inactivity. To disable this
feature, enable Auto-reconnect.
DNS Servers:
Enter the Primary and Secondary DNS Server Addresses
(Static L2TP only).
23D-Link DIR-855 User Manual
Section 3 - Configuration
MTU:
Clone MAC
Address:
Maximum Transmission Unit - you may need to change the MTU for optimal performance with your specic ISP. 1400 is
the default MTU.
The default MAC Address is set to the Internet port’s physical interface MAC address on the Broadband Router. It is not
recommended that you change the default MAC address unless required by your ISP. You can use the Clone Your PC’s
MAC Address button to replace the Internet port’s MAC address with the MAC address of your Ethernet card.
24D-Link DIR-855 User Manual
Section 3 - Configuration
Internet Setup
Static (assigned by ISP)
Select Static IP Address if all the Internet port’s IP information is provided to you by your ISP. You will need to enter in the IP address,
subnet mask, gateway address, and DNS address(es) provided to you by your ISP. Each IP address entered in the elds must be in the
appropriate IP form, which are four octets separated by a dot (x.x.x.x). The Router will not accept the IP address if it is not in this format.
IP Address:
Subnet Mask:
Default Gateway:
DNS Servers:
MTU:
MAC Address:
Enter the IP address assigned by your ISP.
Enter the Subnet Mask assigned by your ISP.
Enter the Gateway assigned by your ISP.
The DNS server information will be supplied by your
ISP (Internet Service Provider.)
Maximum Transmission Unit - you may need to
change the MTU for optimal performance with your
specic ISP. 1500 is the default MTU.
The default MAC Address is set to the Internet port’s
physical interface MAC address on the Broadband
Router. It is not recommended that you change the
default MAC address unless required by your ISP.
You can use the Clone Your PC’s MAC Address
button to replace the Internet port’s MAC address
with the MAC address of your Ethernet card.
25D-Link DIR-855 User Manual
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