-
TP-Link WR-842ND - page 1
TL-WR842ND 300Mbps Multi-Function Wireless N Router Rev: 1.0.0 1910010537 ...
-
TP-Link WR-842ND - page 2
COPYRIGHT & TRADEMARKS S pecifications ar e subject to change without notice. is a registered trademark of TP-LINK TECHNOLOGIES CO., L TD. Other br ands and product names are trademarks or registered trademarks of t heir respective holders. No part of th e specifications ma y be reproduced in any form or by any means or used to make any derivat ...
-
TP-Link WR-842ND - page 3
FCC RF Radiation Exposure S t atement This equipment complies with FCC RF radiatio n exposure limits set forth for an uncontrolled environment. This device and its antenna must not be co -located or operating in conjunction with any other antenna or transmitter . “T o comply with FCC RF exposure compliance r equirements, this grant is applicable ...
-
TP-Link WR-842ND - page 4
This device has been designed to operate with the antennas listed below , and having a maximum gain of 5 dBi. Antennas not included in this list or having a gain greater than 5 dBi are strictly prohibited for use with this device. T he required antenna impedance is 50 ohms. T o reduce potential radio interference to other use rs, the antenna type a ...
-
TP-Link WR-842ND - page 5
TP-LINK TECHNOLOGIES CO., L TD DECLARA TION OF CONFORMITY For the following equipment: Product Description: 300Mbps Multi-Function Wireless N Router Model No.: TL-WR842ND T rademark: TP-LINK We declare under our own respon sibility that the above products satisfy all the technical regulations applicable to the product with in the scope of Council D ...
-
TP-Link WR-842ND - page 6
CONTENTS Package Cont ent s..................................................................................................... 1 Chapter 1. Introducti on ......................................................................................... 2 1.1 Overview of the Router............................................................................ ...
-
TP-Link WR-842ND - page 7
4.7.2 DHCP Client s List ......................................................................................... 47 4.7.3 Address Rese rvation .................................................................................... 48 4.8 VPN ............................................................................................................. ...
-
TP-Link WR-842ND - page 8
4.16.2 ARP Li st........................................................................................................ 95 4.17 Dynamic DNS ........................................................................................................... 95 4.17.1 Comexe.c n DDNS ........................................................................... ...
-
TP-Link WR-842ND - page 9
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 - Package Contents The following items should be found in your package: ¾ TL-WR842ND 300Mbps Multi-Function Wireless N Router ¾ DC Power A dapter for TL-WR842ND 300Mbps Multi-Function Wireless N Router ¾ Quick Install ation Guide ¾ Resource CD for TL-WR842ND 300Mbps Mult i-Function Wireles ...
-
TP-Link WR-842ND - page 10
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 2 - Chapter 1. Introduction Thank you for choosing the TL-WR842ND 300M bps Multi-Function Wireless N Router. 1.1 Overview of the Router Th e TL-WR842ND 300M bps Multi-Function Wireless N Router in teg ra te s 4-port Switch, F ir ewa ll , NA T -Router and Wireless AP . Powered by 2x2 MIM O t ec h ...
-
TP-Link WR-842ND - page 11
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 3 - 1.2 Conventions The Router or TL-WR842ND m entioned in this g uide stands for TL- WR 84 2ND 3 0 0 M b p s M u l t i - F u n c t i o n Wireless N Router without any explanation. 1.3 Main Features ¾ Complies with IEEE 802.1 1n to provide a wireless data rate of up to 450Mbp s. ¾ One 10/100M ...
-
TP-Link WR-842ND - page 12
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 4 - 1.4 Panel Layout 1.4.1 The Front Panel Figure 1-1 Front Panel sketch The Router ’s LEDs are located on the front panel (View from lef t to right). Name Statu s Indication Off The device has a system error . On The device is initialising. （ SYS ） Flashing The device is working properly ...
-
TP-Link WR-842ND - page 13
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 5 - ) Note: After a device is successfully added to the network by WPS function, the WPS LED will keep on for about 5 minutes and then turn off. 1.4.2 The Rear Panel Figure 1-2 Rear Panel sketch The following parts are lo cated on the rear panel (View from left to right). ¾ POWER: The Power soc ...
-
TP-Link WR-842ND - page 14
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 6 - 2) Use the Factory Default WPS/RESET button: With the Router powered on, use a pin to press and hold the WPS/RESET button (approximately 8 seconds) until the SYS LED becomes quick-flash from slow-flash. And then release the button and wait the Router to reboot to its factory default settings ...
-
TP-Link WR-842ND - page 15
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 7 - Chapter 2. Connecting the Router 2.1 System Requirement s ¾ Broadband Internet Access Service (DSL/Cable/Ethernet) ¾ One DSL/Cable Modem that has an RJ45 connector (which is not necessary if the Router is connected directly to the Ethernet.) ¾ PCs with a working Ethernet Adapter and an Et ...
-
TP-Link WR-842ND - page 16
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 8 - ) Note: If you want to use the Router to share files or printer , plug the USB storage device to the USB port or connect the printer to the R outer with a matching cable. 6. Connect the power adapter to the power socket on the Router , and the other end into an electrical outlet. The Router ...
-
TP-Link WR-842ND - page 17
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 9 - Chapter 3. Quick Installation Guide This chapter will show you how to configure the basic functions of your 300Mbps Multi-Function Wireless N Router using Quick Setup Wiz ar d within minutes. 3.1 TCP/IP Configuration The default domain name of the Router is http://tplinklogin.net and the d e ...
-
TP-Link WR-842ND - page 18
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 10 - ¾ If the result displayed is similar to Figure 3-2 , it means the connection between your PC and the Router failed. Figure 3-2 Failure result of Ping command Please check the connection following these step s: 1. Is the connection bet ween your PC and the Router correct? ) Note: The 1/2/3/ ...
-
TP-Link WR-842ND - page 19
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 1 - Settings interface may not be opened with some w eb browsers, it is strongly recommended that you use Internet Explorer . 1. T o access the configurat ion utility , open a web-browser and type in the def ault domain name http://tplinklogin.net in the address field. Figure 3-3 Log in the R ...
-
TP-Link WR-842ND - page 20
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 12 - Figure 3-5 Quick Setup 3. Click Next , and then WAN Connection Type page will appear as shown in Figure 3-6 . Figure 3-6 WAN Connection Type The Router provides Auto-Detect function and supports three popular ways PPPoE , Dyn amic IP and Static IP to connect to the Internet. It’s recommen ...
-
TP-Link WR-842ND - page 21
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 13 - Figure 3-7 Quick Setup - PPPoE ¾ User Name / Password - Enter the User Name and Passw ord provided by your ISP. These fields are case-sensitive. If you have difficulty with this process, please contact your ISP. ¾ Confirm Password - Enter the password again to make sure that the password ...
-
TP-Link WR-842ND - page 22
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 14 - Figure 3-9 Quick Setup – MAC Clone z If you are visiting the Router from another co mputer, rather than the main computer, please select No , and then enter the main computer’s MAC in the field WAN MAC Address . Figure 3-10 Quick Setup – MAC Clone ) Note: 1. It’s strongly recommende ...
-
TP-Link WR-842ND - page 23
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 15 - Figure 3-1 1 Find MAC Address 3) If the connection type detect ed is S tatic IP , the next screen will appear as shown in Figure 3-12 . Figure 3-12 Quick Setup - S tatic IP ¾ IP Address - This is the WAN IP address as seen by external users on the Internet (including your ISP). Your ISP wi ...
-
TP-Link WR-842ND - page 24
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 16 - ¾ Secondary DNS - If your ISP provides another DNS se rver, enter it into this field. 5. Click Next to continue, the Wireless setti ngs p age will appear as shown in Figure 3-13 . Figure 3-13 Quick Setup – Wireless ¾ Wireless Radio - Choose from the drop-down list to enable or disable t ...
-
TP-Link WR-842ND - page 25
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 17 - ¾ Channel - This field determines which operat ing frequency will be used. It is not necessary to change the wireless channel unle ss you notice interference problems with another nearby access point. If you select auto, then the AP will select the best channel automatically. ¾ Mode - Thi ...
-
TP-Link WR-842ND - page 26
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 18 - Figure 3-14 Quick Setup - Finish If there is anything changed on the Wireless page, you will see the Finish page as shown in Figure 3-15 . Click the Reboot button to make your wireless configuration take effect and finish the Quick Setup . Figure 3-15 Quick Setup – Finish ...
-
TP-Link WR-842ND - page 27
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 19 - Chapter 4. Configuring the Router This chapter will show each Web p age's ke y functions and the c onfiguration way . 4.1 Login After your successful login, you will see the sixt een main menus on the lef t of the Web-based utility . On the right, there are the corres ponding explanati ...
-
TP-Link WR-842ND - page 28
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 20 - Figure 4-1 Router S tatus 4.3 Quick Setup Please refer to 3.2 Quick Installation Guide . ...
-
TP-Link WR-842ND - page 29
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 21 - 4.4 WPS This section will guide you to add a new wirele ss device to an existing network quickly by WPS (Wi-Fi Protected Setup) function. a). Choose menu “WPS”, and you will see the next screen (shown in Figure 4-2 ). Figure 4-2 WPS ¾ WPS St atus - Enable or disable the WPS function he ...
-
TP-Link WR-842ND - page 30
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 22 - Y ou can also keep the de fault WPS Status as Enabled and click the Add device button in Figure 4-2 , then Choose “ Press the button of the new device in two minutes ” and click Connect . (Shown in the following figure) Figure 4-3 Add A New Device Step 2: Press and hold the WPS button o ...
-
TP-Link WR-842ND - page 31
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 23 - III. Enter the Router’s PIN on your client device Use this method if your client devic e asks for the Router’s PIN number . Step 1: On the client device, enter the PIN nu mber listed on the R outer ’s Wi-Fi Protected Setup screen. (It is also labeled on the bottom of the Router .) Ste ...
-
TP-Link WR-842ND - page 32
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 24 - Figure 4-6 WAN – Dynamic IP This page displays the W AN IP parameters assigned dynamic ally by your ISP , including IP address, Subnet Mask, Default Gateway , etc. Click the Renew button to renew the IP parameters from your ISP . Click the Release button to release the IP parameters. ¾ M ...
-
TP-Link WR-842ND - page 33
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 25 - Click the Save button to save your settings. 2. If your ISP provides a static or fixed IP Address, Subnet Mask, Gateway and DNS setting, select Static IP . The Static IP settings page will appear, shown in Figure 4-7 . Figure 4-7 WAN - S tatic IP ¾ IP Address - Enter the IP address in dott ...
-
TP-Link WR-842ND - page 34
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 26 - Figure 4-8 W AN - PPPoE ¾ User Name/Password - Enter the User Name and Password provided by your ISP . These fields are case-sensitive. ¾ Secondary Connection - It’ s available only for P PPoE Connection. If your ISP provides an extra Connection type such as Dynamic/S tatic IP to connec ...
-
TP-Link WR-842ND - page 35
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 27 - down. ¾ Time-based Connecting - The connection will only be est ablished in the period from the start time to the end time (both are in HH:MM format). ) Note: Only when you have configured the s ystem time on “ System Tools → Time ” page, will the Time-based Connecting function take ...
-
TP-Link WR-842ND - page 36
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 28 - these fields blank will work. ¾ ISP S pecified IP Address - If your ISP does not automatically assign IP addresses to the Router during login, please click “ Use IP address specified by ISP ” check box and enter the IP address provided by your ISP in dotted-decimal notation. ¾ Detect ...
-
TP-Link WR-842ND - page 37
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 29 - e.g. NSW / ACT - ns w.bigpond.net.au VIC / T AS / W A / SA / NT - vic.bigpond.net.au QLD - qld.bigpond.net.au ¾ MTU Size - The normal MTU (Maximum T ransmission Unit) va lue for most Ethernet networks is 1500 Bytes. It is not recomm ended that you change the default MTU Size unless require ...
-
TP-Link WR-842ND - page 38
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 30 - Figure 4-1 1 W AN - L2TP/Russia L2TP ¾ User Name/Password - Enter the User Name and Password provided by your ISP . These fields are case-sensitive. ¾ Dynamic IP/ S tatic IP - Choose either as you are given by your ISP . Click the Connect button to connect immediately . Click the Disconne ...
-
TP-Link WR-842ND - page 39
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 31 - ¾ Connect Automatically - Connect automatically after the Rout er is disconnected. T o use this option, check the radio button. ¾ Connect Manually - Y ou can configure the Router to ma ke it connect or disconnect manually . After a specified period of inactivity ( Max Idle T ime ), the Ro ...
-
TP-Link WR-842ND - page 40
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 32 - Figure 4-12 PPTP Settings ¾ User Name/Password - Enter the User Name and Password provided by your ISP . These fields are case-sensitive. ¾ Dynamic IP/ S tatic IP - Choose either as you ar e given by your ISP and enter the ISP’ s IP address or the domain name. If you choose static IP an ...
-
TP-Link WR-842ND - page 41
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 33 - automatically re-establish your connection as soon as you attempt to access the Internet again. If you wish to activate Connect on Demand , check the radio button. If you want your Internet connection to remain active at all times, enter “0” in the Max Idle T ime field. Otherwise, enter ...
-
TP-Link WR-842ND - page 42
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 34 - Figure 4-13 LAN ¾ MAC Address - The physical address of the Router , as seen from the LAN. The value can't be changed. ¾ IP Address - Enter the IP address of your Router or reset it in dotted-decimal not ation (factory default: 192.168.0.1). ¾ Subnet Mask - An address code that dete ...
-
TP-Link WR-842ND - page 43
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 35 - ¾ Your PC's MAC Address - This field displays the MAC addr ess of the PC that is ma naging the Router. If the MAC address is required, you can click the Clone MAC Address To button and this MAC addre ss will fill in the WAN MAC Address field. Click Restore Factor y MAC to restore the ...
-
TP-Link WR-842ND - page 44
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 36 - Figure 4-16 Wireless Settings ¾ SSID (1-4) - Up to four SSIDs for each BSS (Basic Se rvice Set) can be entered in the filed SSID1 ~ SSID4. The name can be up to 32 c haracters. The same name (SSID) must be assigned to all wireless devices in your network. Check the Enable box to enable the ...
-
TP-Link WR-842ND - page 45
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 37 - Note Dialog ) Note: Limited by local law regulations, version for Nort h Ame rica does not have region selection opt i on . ¾ Channel - This field determines which operating frequency will be used. The default channel is set to Auto , so the Router will choose the best c hannel automatical ...
-
TP-Link WR-842ND - page 46
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 38 - or more Wlans. If this checkbox is selected, you will have to set the following p arameters as shown in Figure 4-17 . Make sure the following settings are correct. Figure 4-17 ¾ SSID(to be bridged) - The SSID of the AP your Router is going to connect to as a client. You can also use the se ...
-
TP-Link WR-842ND - page 47
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 39 - Figure 4-18 Wireless Security ¾ SSID - Select the desired SSID from the drop-down list. ¾ Disable Security - If you do not want to use wireless securi ty, check this radio button. But it’s strongly recommended to choose one of t he following modes to enable security. ¾ WEP - It is base ...
-
TP-Link WR-842ND - page 48
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 40 - Figure 4-19 WEP • Typ e - you can choose the type fo r the WEP security on the drop-do wn list. The default setting is Automatic , which can select Shared Key or Open System authentication type automatically based on the wirele ss station's capability and request. • WEP Key Format ...
-
TP-Link WR-842ND - page 49
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 41 - notice in red as shown in Figure 4-20 . Figure 4-20 WP A/WP A2 - Enterprise • Radius Server IP - Enter the IP address of the Radius server. • Radius Port - Enter the port number of the Radius server. • Radius Password - Enter the password for the Radius server. • Group Key Up date P ...
-
TP-Link WR-842ND - page 50
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 42 - Be sure to click the Save button to save your settings on this page. 4.6.3 Wireless MAC Filtering Choose menu “ Wireless → MAC Filtering ”, you can control the wire less access by co nfiguring the Wireless MAC Filtering function, shown in Figure 4-22 . Figure 4-22 Wireless MAC Filteri ...
-
TP-Link WR-842ND - page 51
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 43 - 2. Give a simple description for the wireless station in the Description field. For example: Wireless station A. 3. Select Enabled or Disabled for this entry on the Status d rop-down list. 4. Click the Save button to save this entry . T o modify or delete an existing entry: 1. Click the Mod ...
-
TP-Link WR-842ND - page 52
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 44 - 4.6.4 Wireless Advanced Choose menu “ Wireless → Wireless Advanced ”, you can configure the advanced se ttings of your wireless network. Figure 4-24 Wireless Advanced ¾ Transmit Power - Here you can specify the transmit power of Router. You can select High, Middle or Low which you wo ...
-
TP-Link WR-842ND - page 53
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 45 - ¾ DTIM Interval - This value determines the interval of the Delivery Traffic Indication Message (DTIM). A DTIM field is a countdown field informing clients of the next window for listening to broadcast and multicast messages . When the Router has buffered broadcast or multicast messages fo ...
-
TP-Link WR-842ND - page 54
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 46 - If the numbers of connected wireless st ations go beyond one page, click the Next button to go to the next page and click the Previous button to return the previous page. ) Note: This page will be refreshed autom atically every 5 seconds. 4.7 DHCP Figure 4-26 The DHCP menu There are three s ...
-
TP-Link WR-842ND - page 55
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 47 - ¾ End IP Address - S pecify an IP address for the DHCP Server to end with when assigning IP addresses. 192.168.0.199 is the default end address. ¾ Address Lease Time - The Address Lease Time is the amount of time a ne twork user will be allowed connection to the Rout er with their current ...
-
TP-Link WR-842ND - page 56
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 48 - 4.7.3 Address Reservation Choose menu “ DHCP → Address Reservation ”, you can view and add a reserved ad dress for clients via the next screen (shown in Figure 4-29 ).When you specify a reserved IP address for a PC on the LAN, that PC will always receive the same IP address each time ...
-
TP-Link WR-842ND - page 57
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 49 - 2. Modify the information. 3. Click the Save button. Click the Enable/Disabled All button to make all entries enabled/disabled. Click the Delete All button to delete all entries. Click the Next button to go to the next page and Click the Previous button to return the previous page. 4.8 VPN ...
-
TP-Link WR-842ND - page 58
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 50 - Figure 4-33 IKE Policy Settings ¾ Policy Name - Specify a unique name to the IKE po licy for identificat ion and management purposes. ¾ Exchanged Mode - Select the IKE Exchange Mode in phase 1, and ensure the remote V PN peer uses the same mode. z Main mode - Provides identity protection ...
-
TP-Link WR-842ND - page 59
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 51 - ¾ DPD - Enable or disable DPD (Dead Peer Detect) function. If enabled, a Dead Peer Detection (DPD) packet is sent from the VPN Concentrator to the VPN Client to ensure its peer is still there. ¾ DPD Interval - Manually enter the number of seconds fo r the DPD Interval. The default value i ...
-
TP-Link WR-842ND - page 60
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 52 - Figure 4-35 IPsec Policy Settings ¾ Policy Name - Enter the name for the IPsec Policy. ¾ Local Subnet - Enter the local (LAN) subnet and mask.(ex. 192.168.0.0/24) ¾ Peer Subnet - Enter the Peer subnet and mask. ¾ Peer Gateway - Enter the Peer gateway or domain. ¾ Negotiation Mode - Her ...
-
TP-Link WR-842ND - page 61
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 53 - ¾ Out Authentication Key - It is for direction out authenticat ion key set in manual mode, and the key must be same as peer In Authentication Key . ¾ PFS Group - Select the PFS property from the drop-dow n list that should be the same for the local and remote endpoints. If you select &quo ...
-
TP-Link WR-842ND - page 62
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 54 - 10.0.0.10 and 10.0.0.1 respectively . Security protoc ol and other parameters for IPsec tunnel and the remote router should be configured the same. As Security Association is unidirectional, an i ngoing SA and an outgoing SA are created to protect data flows for each tunnel af ter IP sec tu ...
-
TP-Link WR-842ND - page 63
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 55 - ¾ Used - The used space of the USB driver. ¾ Free - The available space of the USB driver. ¾ Use% - The percentage of the used space. ¾ Shared - Indicates the shared or non-shared stat us of the volume. When the volume is shared, you can click the Disable to stop sharing the volume; whe ...
-
TP-Link WR-842ND - page 64
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 56 - 4.9.2 FTP Server Choose menu “ USB Settings → FTP Server ”, you can create an FTP server that can be accessed from the Internet or your local network. Figure 4-40 FTP Server Configuration ¾ Server Status - Indicates the FTP Server's current status. ¾ Internet Access - Select en ...
-
TP-Link WR-842ND - page 65
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 57 - To add a new folder, follow the instructions below. 1. Click Add New Folder in Figure 4-40 . Figure 4-41 Add or Modify Share Folder 2. Select the Share entire partition or a specific folder option. 3. Enter display name of the share folder i n Display Name filed. 4. Click the Save button to ...
-
TP-Link WR-842ND - page 66
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 58 - Figure 4-42 Media Server Setting ¾ Server Name – The name of this Media Server. ¾ Server Status - Indicates the Media Server’s current status, started or stopped. You can click the Start button to start the Media Server and click the Stop button to stop it. ¾ Name - The display name ...
-
TP-Link WR-842ND - page 67
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 59 - Figure 4-44 Media Server Setting 3. Click the Add share fold er button to specify a folder as t he search path of media server. The screen will then appear as shown in Figure 4-45 . Figure 4-45 Add New Folder ¾ Display Name - You can enter a display name for the share folder. ¾ Share enti ...
-
TP-Link WR-842ND - page 68
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 60 - a) Select the Share entire partition or a specified folder option. b) Enter the display name of the share folder in Display Name edit box. c) Click the Save button to save the configuration a nd the page will be redirected to the media server configur ation page as shown in Figure 4-46 . Fi ...
-
TP-Link WR-842ND - page 69
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 61 - print service. ¾ Busy - Indicates the print service has been turned on, but at this mom ent other users are using print services. 4.9.5 User Accounts Y ou can specify the user name and password for S torage Sharing and FTP Server users on this page. Storage Sharing users can use Internet E ...
-
TP-Link WR-842ND - page 70
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 62 - Figure 4-49 Add or Modify User Account ¾ User Name - Type the user name that you want to give access to the USB drive. The user name must be composed of alphanumeric symbols not exceeding 15 charac ters in length. ¾ Password - Enter the password in the Password fiel d. The password must b ...
-
TP-Link WR-842ND - page 71
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 63 - 4.10 Forwarding Figure 4-50 T he Forwarding menu There are four submenus under the Forwar ding menu (shown in Figure 4-50 ): Virtual Servers , Port T riggering , DMZ and UPnP . Click any of them, and you will be able to configure the corresponding function. 4.10.1 Virtual Servers Choose men ...
-
TP-Link WR-842ND - page 72
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 64 - supported by the Router). ¾ Statu s - The status of this entry , "Enabled" m eans the virtual server entry is enabled. ¾ Common Service Port - Some common services already exist in the drop-down list. ¾ Modify - T o modify or del ete an existing entry . To set up a virtual serv ...
-
TP-Link WR-842ND - page 73
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 65 - Click the Next button to go to the next page and click the Previous button to return to the previous page. ) Note: If you set the service port of the virtual server as 80, you must set the Web management port on System Tools –> Remote Management page to be any other value except 80 suc ...
-
TP-Link WR-842ND - page 74
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 66 - Figure 4-54 Add or Modify a T r iggering Entry ¾ T rigger Port - The port for outgoing traffic. An out going connection using this port will trigger this rule. ¾ T rigger Protocol - The protocol used for Trigger Port s, either TCP , UDP , or All (all protocols supported by the Router). ¾ ...
-
TP-Link WR-842ND - page 75
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 67 - Once the Router is configured, the operation is as follows: 1. A local host makes an outgoing co nnection to an external host using a destination port number defined in the T rigger Port field. 2. The Router r ecords this connection, opens t he incoming port or ports associated with this en ...
-
TP-Link WR-842ND - page 76
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 68 - such as Internet computers, to access the local host resources or devices as needed. UPnP devices can be automatically discovered by the UPnP serv ice application on the LAN. Figure 4-56 UPnP Setting ¾ Current UPnP Status - UPnP can be enabled or disabled by clicking the Enable or Dis able ...
-
TP-Link WR-842ND - page 77
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 69 - 4.11 Security Figure 4-57 The Security menu There are four submenus under t he Security menu as shown in Figure 4-57 : Basic Securit y , Advanced Security , Lo cal Management and Remote Management. Click any of them, and you will be able to configure t he corresponding function. 4.11.1 Basi ...
-
TP-Link WR-842ND - page 78
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 70 - ¾ VPN - VPN Passthrough must be enabled if you want to allow VPN tunnels using VPN protocols to pass through the Router. • PPTP Passthrough - Point-to-Point Tunneling Protocol (PPTP) allows the Point-to-Point Protocol (PPP) to be t unneled through an IP network. To allow PPTP tunnels to ...
-
TP-Link WR-842ND - page 79
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 71 - Figure 4-59 Advanced Security ¾ Packets Statistics Interval (5~60) - The default value is 10. Se lect a value between 5 and 60 seconds from the drop-down list. The Packets S tatistics Interval value indicates the time section of the p ackets statistics. The result of the statistics is used ...
-
TP-Link WR-842ND - page 80
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 72 - ¾ Enable TCP-SYN-FLOOD Attack Filtering - Enable or Disable the TCP-SYN-FLOOD Attack Filtering. ¾ TCP-SYN-FLOOD Packets Threshold (5~3600) - The default value is 50. Enter a value between 5 ~ 3600. When the current TCP-SYN-FLOOD Packets numbers is beyond the set value, the Router will sta ...
-
TP-Link WR-842ND - page 81
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 73 - use the password to browse the built-in web pages to perform Administrator tasks while all the others will be blocked. After click the Add button, your PC's MAC Addre ss will be placed in the list above. Click the Save button to save your settings. ) Note: If your PC is blocked but you ...
-
TP-Link WR-842ND - page 82
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 74 - 2. Be sure to chang e the Router's default password to a very secure password . 4.12 Parent al Control Choose menu “ Parent al Control ”, and then you c an configure the parental control in the screen as shown in Figure 4-62 . The Parental Control function c an be used to control t ...
-
TP-Link WR-842ND - page 83
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 75 - Figure 4-63 Add or Modify Parental Control Entry ¾ Parental Control - Check Enable if you w ant this function to take effect; otherwise, check Disable . ¾ MAC Address of Parental PC - In this field, enter the MAC address of the controlling PC, or you can make use of the Copy To Above butt ...
-
TP-Link WR-842ND - page 84
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 76 - 3. Give a description (e.g. Allow Google) fo r the website allowed to be accessed in the Website Description field. 4. Enter the allowed domai n name of the websit e, either the full name or the keywords (e.g. google) in the Allowed Domain Name field. Any domain name with keywords in it ( w ...
-
TP-Link WR-842ND - page 85
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 77 - Figure 4-64 Parental Control Settings 4.13 Access Control Figure 4-65 Access Control There are four submenus under the A ccess Control menu as shown in Figure 4-59 : Rule , Host , Ta r g e t and Schedule . Click any of them, and you will be able to configure the corresponding function. 4.13 ...
-
TP-Link WR-842ND - page 86
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 78 - ¾ Enable Internet Access Control - Select the check box to enable the Internet Access Control function, so the Default Filter Policy can take effect. ¾ Rule Name - Here displays the name of the rule and this name is unique. ¾ Host - Here displays the host selected in the corresponding ru ...
-
TP-Link WR-842ND - page 87
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 79 - ¾ Mode - Here are two options, IP Address and MAC Address . You can select either of them from the drop-down list. If the IP Address is selected, you can see the following item: ¾ LAN IP Address - Enter the IP address or address range of the host in dotted-decimal format (e.g. 192.168.0.2 ...
-
TP-Link WR-842ND - page 88
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 80 - ¾ Protocol - Here are four options, All, TCP, UDP , and ICMP. Select one of them from the drop-down list for the target. ¾ Common Service Port - Here lists some common serv ice ports. Select one from the drop-down list, and the corresponding port number will be filled in the Target Port f ...
-
TP-Link WR-842ND - page 89
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 81 - 4. Click Next when finishing creating the advanced schedule entry, and the next screen will appear as shown in Figure 4-70 . Figure 4-70 Quick Setup – Create an Internet Access Control Entry ¾ Rule - In this field, create a name for the rule. Note that this name should be unique (e.g. Ru ...
-
TP-Link WR-842ND - page 90
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 82 - 7. Click the Save button. Figure 4-71 Add Internet Access Control Entry For example : If you desire to allow the host with MAC address 00-1 1-22-33-44-AA to access www .googl e.com only from 18:00 to 20:00 on Saturday and Sunday , and forbid other hosts in the LAN to access the Internet, yo ...
-
TP-Link WR-842ND - page 91
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 83 - 4.13.2 Host Choose menu “ Access Control → Host ”, and then you can view and set a Host list in the screen as shown in Figure 4-72 . The host list is necessary fo r the Access Control Rule. Figure 4-72 Host Settings ¾ Host Description - Here displays the description of t he host and ...
-
TP-Link WR-842ND - page 92
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 84 - Figure 4-73 Add or Modify a Host Entry Figure 4-74 Add or Modify a Host Entry For example : If you desire to restrict the inter net activities of host with MAC address 00-11-22-33-44-AA, you should first follow the settings below: 1. Click Add New... button in Figure 4-7 2 to enter the Add ...
-
TP-Link WR-842ND - page 93
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 85 - Figure 4-75 T arget Settings ¾ Target Description - Here displays the description about the target and this description is unique. ¾ Information - The target can be IP address, port, or domain name. ¾ Modify - To modify or delete an existing entry. To add a new entry, please follow the s ...
-
TP-Link WR-842ND - page 94
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 86 - Figure 4-77 Add or Modify an Access T arget Entry 1) In Target Description field, create a unique description for the target (e.g. Target_1). 2) In Domain Name field, enter the domain name, eit her the full name or the keywords (for example, google) in the blank. Any domain name with keywor ...
-
TP-Link WR-842ND - page 95
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 87 - 4.13.4 Schedule Choose menu “ Access Control → Schedule ”, and then you can view and set a Schedule list in the next screen as shown in Figure 4-78 . The Schedule list is necessary for the Access Control Rule. Figure 4-78 Schedule Settings ¾ Schedule Description - Here displays the d ...
-
TP-Link WR-842ND - page 96
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 88 - Figure 4-79 Advanced Schedule Settings For example : If you desire to restrict the inter net activities of host with MAC address 00-11-22-33-44-AA to access www.google.com only from 18:00 to 20:00 on Saturday and Sunday , you should first follow the settings below: 1) Click Add New... butto ...
-
TP-Link WR-842ND - page 97
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 89 - corresponding function. 4.14.1 Static Routing List Choose menu “ Advanced Routing → St atic Routing List ”, and then you can configure the static route in the next screen (shown in Figure 4-81 ). A static route is a pre-determined path that network information must travel to reach a s ...
-
TP-Link WR-842ND - page 98
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 90 - 4. Click the Save button to make the entry take effect. Other configurations for the entries: Click the Delete button to delete the entry . Click the Enable All button to enable all the entries. Click the Disable All button to disable all the entries. Click the Delete All button to delete a ...
-
TP-Link WR-842ND - page 99
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 91 - 4.15 Bandwid th Control Figure 4-84 Bandwidt h Control There are two submenus under the Bandw idth Control menu as shown in Figure 4-84 : Control Settings and Rules List . Click any of them, and you will be able to configure the corresponding function. The detailed explanations for each sub ...
-
TP-Link WR-842ND - page 100
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 92 - Figure 4-86 Bandwidt h Control Rules List ¾ Description - This is the information about the rules such as ad dress range. ¾ Egress bandwidth - This field displays the max and mix upload bandwidth through the W AN port, the default is 0. ¾ Ingress bandwidth - This field displa ys the max ...
-
TP-Link WR-842ND - page 101
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 93 - 4.16 IP & MAC Binding Setting Figure 4-88 the IP & MAC Binding menu There are two submenu s under the IP &MAC Binding menu (shown in Figure 4-88 ): Binding Settings and ARP List . Click any of them, and you will be able to scan or configure the corresponding function. The detail ...
-
TP-Link WR-842ND - page 102
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 94 - Figure 4-90 IP & MAC Binding Setting (Add & Modify) To add IP & MAC Binding entries, follo w the steps below. 1. Click the Add New ... button as shown in Figure 4-89 . 2. Enter the MAC Address and IP Address. 3. Select the Bind checkbox. 4. Click the Save button to save it. To m ...
-
TP-Link WR-842ND - page 103
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 95 - 4.16.2 ARP List T o manage the computer , you could observe the computers in the LAN by checking the relationship of MAC address and IP address on the ARP list, and you could also configure the items on the ARP list. This page displays the ARP Li st; it shows all the existing IP & MAC B ...
-
TP-Link WR-842ND - page 104
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 96 - service providers such as www.comexe.cn , ww w .dynd ns.org , or www.no-ip.com . The Dynamic DNS client service provider w ill give you a password or key. 4.17.1 Comexe.c n DDNS If the dynamic DNS Service Provider you select is www.comexe.cn , the page will appear as shown in Figure 4-93 . ...
-
TP-Link WR-842ND - page 105
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 97 - ) Note: If you want to login again with another account after a successful login, please click the Logout button, then input your new us ername and password and click the Login button. 4.17.2 Dyndns.or g DDNS If the dynamic DNS Service Provider you select is www .dyndns.org , the page will ...
-
TP-Link WR-842ND - page 106
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 98 - 4.17.3 No-ip.com DDNS If the dynamic DNS Service Provider you select is www.no-ip.com , the page will appear as shown in Figure 4-95 . Figure 4-95 No-ip.com DDNS Settings To set up for DDNS, follow these instructions: 1. Enter the User Name for your DDNS account. 2. Enter the Password for y ...
-
TP-Link WR-842ND - page 107
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 99 - 4.18 System T ools Figure 4-96 The System T ools menu Choose menu “ System T ools ”, and you can see the submen us under the main menu: Ti me Settings , Diagnostic , Firmw are Upgrade , Factory Default s, Backup & Restore, Reboot, Password, System Log and St atistics. Click any of t ...
-
TP-Link WR-842ND - page 108
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 100 - ¾ Time Zone - Select your local time zone from this pull down list. ¾ Date - Enter your local date in MM/ DD/YY into the right blanks. ¾ Tim e - Enter your local time in HH/MM/SS into the right blanks. ¾ NTP Server I / NTP Server II - Enter the address or domain of the NTP Server I or ...
-
TP-Link WR-842ND - page 109
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 101 - ) Note: 1. This setting will be used for some time-based fu nctions such as firewall. Y ou must specify your time zone once you login to the router successfully , otherwise, these functions will not take ef fect. 2. The time will be lost if the router is turned off. 3. The Router will auto ...
-
TP-Link WR-842ND - page 110
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 102 - pinging/tracerouting the IP address is successf ul, but pinging/tracerout ing the domain name is not, you might have a name resolution problem . In this case, ensure that the domain name you are specifying can be resolved by usi ng Domai n Name System (DNS) queries. ¾ IP Address/Domain Na ...
-
TP-Link WR-842ND - page 111
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 103 - Figure 4-101 Firmware Upgrade ¾ Firmware Version - Displays the current firmware version. ¾ Hardware Version - Displays the current hardware vers ion. The hardwar e version of the upgrade file must accord with the R outer’s current hardware version. T o upgrade the Router's firmwa ...
-
TP-Link WR-842ND - page 112
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 104 - 6) The upgra de process takes a few moments and the Router restarts automatically when the upgrade is complete. 4.18.4 Factor y Defaults Choose menu “ System T ools → Factor y Default s ”, and then and you can restore the configurations of the Router to factory defaults on the follow ...
-
TP-Link WR-842ND - page 113
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 105 - • Click the Restore button to update the configuration with the file whose path is the one you have input or selected in the blank. ) Note: The current configuration will be covered with the uploading configuration file. Wrong process will lead the device unmanaged. The restoring process ...
-
TP-Link WR-842ND - page 114
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 106 - Figure 4-105 Password It is strongly recommended that you should change the factor y default user name and passwor d of the Router, because all users who try to access the Router's Web-based utility or Quick Setup will be prompted for the Router's default user name and password. ...
-
TP-Link WR-842ND - page 115
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 107 - Figure 4-106 System Log ¾ Auto Mail Feature - Indicates whether auto mail feature is enabled or not. ¾ Mail Settings - Set the receiving and sending mailbox address, server ad dress, validation information as well as the timetable for Auto Mail Feature, as shown in Figure 4-107 . Figure ...
-
TP-Link WR-842ND - page 116
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 108 - • Authentication - Most SMTP Server requires Authent ication. It is required by most mailboxes that need User Name and Password to log in. ) Note: Only when you select Authentication , do you have to enter th e User Name and Password in the following fields. • User Name - Your mail acc ...
-
TP-Link WR-842ND - page 117
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 109 - Figure 4-108 S tatistics ¾ Current Statistics Status - Enable or Disable. The default value is disabled. To enable it, click the Enable button. If it is disabled, the function of DoS protecti on in Security settings will be disabled. ¾ Packets Statistics Interval （ 5-60 ） - The defau ...
-
TP-Link WR-842ND - page 118
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 10 - Statistics Table: IP/MAC A ddress T he IP and MAC address are displa yed with related statistics. Packets The total number of packets received a nd transmitted by the Router. Total Bytes The total number of bytes received and transmitted b y the Router. Packets The total number of packets ...
-
TP-Link WR-842ND - page 119
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 1 1 - Appendix A: FAQ 1. How do I configure the Router to access Internet by ADSL users? 1) First, configure the ADSL Modem configured in RFC1483 bridge model. 2) Connect the Ethernet cable from your AD SL Modem to the W AN port on the Router . The telephone cord plugs into the Line port of th ...
-
TP-Link WR-842ND - page 120
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 12 - ) Note: 1) Sometimes the connection cannot be di sconnected although you specify a time to Max Idle T ime, since some applications is visiting the Internet continually in the background. 2) If you are a Cable user , please confi gure the Rout er following the above steps. 2. How do I conf ...
-
TP-Link WR-842ND - page 121
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 13 - Figure A-4 Virtual Servers Figure A-5 Add or Modify a V irtual server Entry ) Note: Your opposite side should call your WAN IP , which is displayed on the “Status” page. 4) How to enable DMZ Host: Log in to the Route r , click the “ Forwarding ” menu on the left of your browser , ...
-
TP-Link WR-842ND - page 122
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 14 - check the Enable radio button next to H323 ALG . Remember to click the Save button. Figure A-7 Basic Security 4. I w ant to build a WEB Server on the LAN, w hat should I do? 1) Because the WEB Server port 80 will inte rfere with the WEB management port 80 on the Router , you must change t ...
-
TP-Link WR-842ND - page 123
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 15 - F igure A-8 Remote Management ) Note: If the above configuration takes effect, you c an visit and configure the Router by typing http://192.168.0.1:88 (the Router’s LAN IP address: W eb Management Port) in the address field of the Web browser. If the LAN IP of the modem connected with y ...
-
TP-Link WR-842ND - page 124
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 16 - Figure A-10 Add or Modify a Virtual server Entry 5. The w ireless st ations cannot connect to the Router . 1) Make sure the " Wireless Router Radio " is enabled. 2) Make sure that the wireless stations' SSID accord with the Router's SSID. 3) Make sure the wireless st a ...
-
TP-Link WR-842ND - page 125
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 17 - Appendix B: Configuring the PCs In this section, we’ll introduce how to inst all and configure the TCP/IP correctly in Windows XP . First make sure your Ethernet Adapter is wo rking, refer to the adapter ’s manual if needed. 1. Install TCP/IP compone nt 1) On the Windows taskbar , cli ...
-
TP-Link WR-842ND - page 126
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 18 - 4) In the prompt page that showed below , double click on the Internet Protocol (TCP/IP) . Figure B-2 5) The following TCP/IP Properties window will display and the IP Address tab is open on this window by default. ...
-
TP-Link WR-842ND - page 127
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 1 19 - 6) Select Obt ain an IP address automatically and Obt ain DNS server au tomatically , as shown in the Figure below: Figure B-3 ...
-
TP-Link WR-842ND - page 128
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 120 - Appendix C: Specifications General S tanda rds IEEE 802.1 1n, IEEE 802.1 1g, IEEE 802.1 1b, IEEE 802.1 1a, IEEE 802.1 1e, IEEE 802.1 1i, IEEE 802.1X, IEEE 802.3X, IEEE 802.3, IEEE 802.3u, IEEE 802.3ab Protocols TCP/IP , PPPoE, DHCP , ICMP , NA T , SNTP Ports One 10/100M Auto-Negotiation In ...
-
TP-Link WR-842ND - page 129
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 121 - Appendix D: Glossary ¾ 802.11n - 802.11n builds upon previous 802.11 standards by adding MIMO (multiple-input multiple-output). MIMO uses multiple transmi tter and receiver an tennas to allow for increased data throughput via spatial multiplexing and increa sed range by exploiting the spa ...
-
TP-Link WR-842ND - page 130
TL-WR842ND 300Mbps Multi-Function Wireless N Router - 122 - hosts to the Internet over an always-on connection by simulating a dial-up connection. ¾ SSID - A S ervice S et Id entification is a thirty-two char acter (maximum) alphanumeri c key identifying a wireless local area network. Fo r the wireless devices in a network to communicate with each ...
Do you have a question concerning TP-Link WR-842ND?
Use the form below
If you did not solve your problem by using a manual TP-Link WR-842ND, ask a question using the form below. If a user had a similar problem with TP-Link WR-842ND it is likely that he will want to share the way to solve it.