D-Link DSL-2520U User Manual Download Page 7

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DSL-2520U

ADSL2/2+ Router with USB and Ethernet Ports

User Manual

Overview

Network Protocols and Functions:

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Static IP routing

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NAT

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DHCP server/client/relay

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DNS relay

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DDNS

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UPnP

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Support of VLAN

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IGMP proxy.

Firewall and Access Management Functions:

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NAT firewall

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Stateful Packet Inspection (SPI)

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URL filter

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Packet filtering (IP/ICMP/TCP/UDP)

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Virtual servers

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Prevention of DoS attacks

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Intrusion detection system

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DMZ

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Port Triggering.

QoS:

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Interface grouping

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3 priority queues.

Configuration and Management:

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Multilingual web-based interface for configuration and management

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Access via TELNET

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Firmware update via web-based interface

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Saving/restoring configuration to/from file

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Support of remote logging.

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of 67

Summary of Contents for DSL-2520U

Page 1: ...User Manual DSL 2520U ADSL2 2 Router with USB and Ethernet Ports August 2011 ...

Page 2: ...ore You Begin 12 Connecting to PC in OS Windows XP 13 PC with Ethernet Adapter 13 PC with USB Port 13 Obtaining IP Address Automatically 14 Connecting to Web based Interface 16 Saving and Restoring Settings 18 Chapter 4 Configuring via Web based Interface 19 Status 19 Network Statistics 19 DSL Status 20 WAN Status 21 DHCP 22 Routing Table 23 LAN Clients 24 Net 25 Connections 25 Editing Local Inter...

Page 3: ... Manual Firewall 48 IP Filters 48 Virtual Servers 50 DMZ 52 Application Rules 53 MAC Filter 56 Control 59 URL Filter 59 System 61 Administrator Password 61 Configuration 62 System Log 63 Firmware Upgrade 65 Chapter 5 Abbreviations and Acronyms 66 Page 3 of 67 ...

Page 4: ...Quick Installation Guide A reference to a document Change A name of a menu menu item control field checkbox drop down list button etc 192 168 1 1 Data that you should enter in the specified field Information An important note Document Structure Chapter 1 describes the purpose and structure of the document Chapter 2 gives an overview of the router s hardware and software features and describes its ...

Page 5: ...t in firewall the QoS engine and numerous additional features The router is equipped with an ADSL port to connect to an ADSL line and an Ethernet port which can be used to connect one computer or switch The device is also equipped with a USB port to which you can connect a single computer The router DSL 2520U includes a built in firewall The advanced security functions minimize threats of hacker a...

Page 6: ... 992 2 G lite Annex A ITU T G 994 1 G hs ADSL2 ITU T G 992 3 G dmt bis Annex A L M ITU T G 992 4 G lite bis Annex A ADSL2 ITU T G 992 5 Annex A M WAN Connection Types PPPoA PPPoE IPoE IPoA Bridge ATM PPP Protocols Bridged and routed Ethernet encapsulation VC based or LLC based multiplexing ATM Forum UNI3 1 4 0 PVC up to 8 PVCs ATM Adaptation Layer Type 5 AAL5 ITU T I 610 OAM F4 F5 loopback ATM QoS...

Page 7: ...irewall Stateful Packet Inspection SPI URL filter Packet filtering IP ICMP TCP UDP Virtual servers Prevention of DoS attacks Intrusion detection system DMZ Port Triggering QoS Interface grouping 3 priority queues Configuration and Management Multilingual web based interface for configuration and management Access via TELNET Firmware update via web based interface Saving restoring configuration to ...

Page 8: ...ew Power External power adapter DC 5V 1A ON OFF power switch Reset to Factory Defaults button Operating Temperature From 0 0 C to 40 0 C from 32 0 F to 104 0 F Storage Temperature From 20 0 C to 65 0 С from 4 0 F to 149 0 F Humidity From 5 to 95 non condensing Page 8 of 67 ...

Page 9: ...failure of the system LAN Solid green A device is connected to the port Blinking green The LAN port is active upstream or downstream traffic USB Solid green A device is connected to the port Blinking green The USB port is active upstream or downstream traffic DSL Solid green DSL has been synchronized Blinking green Detecting a carrier signal and synchronizing DSL No light No carrier signal Interne...

Page 10: ...e telephone line USB A USB port to connect to a single computer LAN An Ethernet port to connect a computer switch RESET A button to restore the factory default settings To restore the factory defaults push the button with the device turned on hold it for 10 seconds and then release the button ON OFF A button to turn the router on off 5V 1A Power connector Page 10 of 67 ...

Page 11: ...al surface or mount the router on the wall the mounting holes are located on the bottom panel of the device Make sure that the router is provided with sufficient ventilation To prevent overheating do not obstruct the ventilation openings of the router Plug the router into a surge protector to reduce the risk of damage from power surges and lightning strikes Operate the router only from an electric...

Page 12: ...ed interface is available from any operating system that supports a web browser Web Browser The following web browsers are recommended Windows Internet Explorer Mozilla Firefox or Opera For successful operation JavaScript should be enabled on the web browser Make sure that JavaScript has not been disabled by other software such as virus protection or web user security packages running on your comp...

Page 13: ... system is completely loaded PC with USB Port Do not connect your router to your PC until the USB driver is installed 1 Turn on your computer and wait until the operating system is completely loaded Insert the CD from the router s delivery package into the CD ROM drive Open the disk and go to the USBDriver folder then run the setup exe file Wait until the USB driver is installed When the installat...

Page 14: ...dow 2 In the Network Connections window right click the relevant Local Area Connection icon and select the Properties line in the menu displayed Figure 3 The Network Connections window 3 In the Local Area Connection Properties window on the General tab in the This connection uses the following items section select the Internet Protocol TCP IP line Click the Properties button Figure 4 The Local Are...

Page 15: ...nstallation and Connection 4 Select the Obtain an IP address automatically radio button Click the OK button Figure 5 The Internet Protocol TCP IP Properties window Click the ОК button Now your computer is configured to obtain an IP address automatically Page 15 of 67 ...

Page 16: ... following IP address is specified 192 168 1 1 Press the Enter key Figure 6 Connecting to the web based interface of the DSL 2520U device 3 On the opened page enter the username login and password for the administrator account by default the following username and password are specified admin admin Then click the Enter button Figure 7 The login page If the error The page cannot be displayed or Una...

Page 17: ...assword upon initial configuration of the router To do this proceed to the System Administrator password page The web based interface of the router is multilingual Select a needed language from the menu displayed when the mouse pointer is over the Language caption You can change the language of the web based interface in any menu item Figure 9 Changing the language of the web based interface Page ...

Page 18: ...an save the device s parameters via the Save button on the System Configuration page Click the Backup line and follow the dialog box appeared to save the configuration all settings of the router to your PC Also you can save the router s configuration to your PC via the Backup button on the System Configuration page Click the Factory line to restore the factory default settings Also you can restore...

Page 19: ...k statistics and data on network devices connected to the router Network Statistics On the Status Network statistics page you can view statistics for all interfaces connections existing in the system For each connection the following data are displayed state IP address subnet mask and gateway if the connection is established MAC address MTU value and volume of data received and transmitted with in...

Page 20: ... Ports User Manual Configuring via Web based Interface DSL Status The information shown on the tabs of the Status DSL status page can be used for troubleshooting and diagnosing connection problems Figure 13 The Status DSL status page Page 20 of 67 ...

Page 21: ...ADSL2 2 Router with USB and Ethernet Ports User Manual Configuring via Web based Interface WAN Status The Status WAN status page displays active WAN connections Figure 14 The Status WAN status page Page 21 of 67 ...

Page 22: ...terface DHCP The Status DHCP page displays the information on computers that have been identified by hostnames and MAC addresses and have got IP addresses from the DHCP server of the device as well as the IP address expiration periods the lease time Figure 15 The Status DHCP page Page 22 of 67 ...

Page 23: ...r Manual Configuring via Web based Interface Routing Table The Status Routing table page displays the information on routes The table contains destination IP addresses gateways subnet masks and other data Figure 16 The Status Routing table page Page 23 of 67 ...

Page 24: ... view data on network devices connected to the router The page displays devices connected to the router s LAN and devices accessing the web based interface of the router Figure 17 The Status LAN clients page For each device the following data are displayed the IP address the MAC address and the interface to which the device is connected Page 24 of 67 ...

Page 25: ...face of the router br0 You cannot delete this connection Figure 18 The Net Connections page To create a new connection click the Add button On the page displayed specify the relevant values To edit an existing connection left click the relevant line in the table On the page displayed change the parameters and click the Save button To delete an existing connection left click the relevant line in th...

Page 26: ...Interface Editing Local Interface Parameters To edit the parameters of the router s local area network left click the LAN connection on the Net Connections page On the Main tab you can configure basic parameters of the router s LAN Figure 19 Basic parameters of the router s LAN Page 26 of 67 ...

Page 27: ...al layer Physical interface The physical interface to which this connection is assigned br0 IP settings IP Address The router s IP address By default the following value is specified 192 168 1 1 Netmask The subnet mask By default the following value is specified 255 255 255 0 Interface The name assigned to the connection by the system When all needed settings are configured click the Save button O...

Page 28: ...er is used to assign IP addresses to clients When this value is selected the External DHCP server IP field is displayed on the tab Start IP The start IP address of the address pool used by the DHCP server to distribute IP addresses to clients End IP The end IP address of the address pool used by the DHCP server to distribute IP addresses to clients Lease time The lifetime of IP addresses leased by...

Page 29: ...tab for configuring MAC IP pairs To create a MAC IP pair set a fixed IP address in the local area network for a device with a certain MAC address click the Add button Then enter the needed IP address and MAC address in the relevant fields and click the Save button Existing MAC IP pairs are displayed on the Static DHCP tab To remove a pair select the relevant line in the table and click the Remove ...

Page 30: ...th USB and Ethernet Ports User Manual Configuring via Web based Interface Creating ADSL WAN Connection Figure 22 The page for creating a new connection The General settings Physical layer and VLAN settings sections Page 30 of 67 ...

Page 31: ...IPoE IPoA Bridge Enable Select the checkbox to enable the connection Direction The direction of this connection Physical layer Physical interface A physical or virtual interface to which the new connection will be assigned Leave the Create value to create a new interface at the physical layer VPI Virtual Path Identifier The valid range is from 0 to 250 VCI Virtual Circuit Identifier The valid rang...

Page 32: ...ns that require a constant data rate It is mostly used for transferring uncompressed audio and video e g videoconferencing interactive audio telephony audio video distribution television distance education e shops and retrieval video on demand audio libraries When you select this value from the drop down list the Peak Cell Rate field is displayed Specify a required value in cells per second Non Re...

Page 33: ...he Miscellaneous section is displayed for all connection types except for Bridge Figure 23 The page for creating a new connection The Miscellaneous section Parameter Description Miscellaneous Enable IGMP Multicast Select the checkbox to allow multicast traffic from the external network e g video streaming to be received NAT Select the checkbox if you want one WAN IP address to be used for all comp...

Page 34: ...ttings PPP Username A username login to access the Internet Without authorization Select the checkbox if you don t need to enter a username and password to access the Internet Password A password to access the Internet Password confirmation The confirmation of the entered password to avoid mistypes Authentication algorithm Select a required authentication method from the drop down list or leave th...

Page 35: ... to keep you connected to your ISP even when the connection has been inactive for a specified period of time When the checkbox is selected the LCP interval and LCP fails fields are available Specify the required values Use Static IP Address Select the checkbox if you want to use a static IP address to access the Internet In the IP Address field displayed when the checkbox is selected specify a sta...

Page 36: ... for this connection When the checkbox is selected the IP Address Netmask and Gateway IP Address fields are not displayed IP Address Enter an IP address for this WAN connection Netmask Enter a subnet mask for this WAN connection Gateway IP Address Enter an IP address of the gateway used by this WAN connection Vendor ID Displayed for the IPoE type only The identifier of your ISP This field is speci...

Page 37: ... UPnP On the Advanced UPnP page you can enable the UPnP function UPnP is a set of networking protocols designed for automatic configuration of network devices The UPnP function performs automatic configuration of the device s parameters for network applications requiring an incoming connection to the router Figure 26 The Advanced UPnP page If you want to manually specify all parameters needed for ...

Page 38: ...s ports create groups of interfaces which allows distinguishing different types of traffic This function is mostly used in Triple play networks Figure 27 The Advanced Interface grouping page To create a new rule for interface grouping a group of ports click the Add group button the button is not displayed if there is no WAN connection in the system Figure 28 The page for adding a new group of port...

Page 39: ...lumn of the field WANs WAN connections to which the new group will be assigned Use the button to select WAN connections The selected connections will be displayed in the right column of the field Click the Save button When you add an interface to the new group it is excluded from the group to which it has been assigned before To edit or remove an existing group select the relevant group on the Adv...

Page 40: ...nfiguring via Web based Interface DDNS On the Advanced DDNS page you can define parameters of the DDNS service which allows associating a domain name with dynamic IP addresses Figure 29 The Advanced DDNS page To add a new DDNS service click the Add button Page 40 of 67 ...

Page 41: ...ovider User name The username to authorize for your DDNS provider User password The password to authorize for your DDNS provider Interface Select a WAN connection which IP address will be used to access the DDNS service Click the Change button To edit parameters of the existing DDNS service click the relevant service link On the opened page change the needed parameters and click the Change button ...

Page 42: ...tomatically from your ISP upon installing a connection When you use the built in DHCP server the network parameters including DNS servers are distributed to clients automatically If you want to configure automatic obtainment of DNS servers addresses deselect the Manual checkbox select a WAN connection which will be used to obtain addresses of DNS servers automatically from the Interface drop down ...

Page 43: ...face Routing On the Advanced Routing page you can add static routes routes for networks that are not connected directly to the device but are available through the interfaces of the device into the system Figure 32 The Advanced Routing page To create a new route click the Add button Page 43 of 67 ...

Page 44: ...ric for the route The lower the value the higher is the route priority Optional Via Interface Select an interface connection through which the destination network can be accessed from the drop down list If you have selected the Auto value of this drop down list the router itself sets the interface on the basis of data on connected networks Click the Save button To edit an existing route select the...

Page 45: ...guring via Web based Interface ADSL The Advanced ADSL page includes the set of ADSL standards that should be defined by an ISP Contact your ISP to set proper parameters Select the relevant options and click the Change button Figure 34 The Advanced ADSL page Page 45 of 67 ...

Page 46: ...ccess page you can configure remote access to the web based interface of the router By default the access from external networks to the router is closed If you need to allow access to the router from the external network create relevant rules Figure 35 The Advanced Remote access page To create a new rule click the Add button Page 46 of 67 ...

Page 47: ...l interface through which the web based interface of the router is accessed IP address A host or a subnet to which the rule is applied Mask The mask of the subnet Protocol The protocol available for remote management of the router HTTP ICMP TELNET Click the Change button To edit a rule for remote access click the relevant link On the opened page change the needed parameters and click the Change bu...

Page 48: ...f the router add rules for IP filtering define a DMZ zone create virtual servers configure MAC filters and the Port Triggering function IP Filters On the Firewall IP filters page you can create new rules for filtering IP packets and edit or remove existing rules Figure 37 The Firewall IP filters page To create a new rule click the Add button Page 48 of 67 ...

Page 49: ...Protocol A protocol for network packet transmission Select a value from the drop down list IP Addresses IP address range Select the checkbox if you want to specify a range of IP addresses as the source or destination IP address Source The source host subnet IP address To specify an IP address leave 32 in the field following the slash character Destination The destination host subnet IP address To ...

Page 50: ...separated by a colon Click the Change button To edit a rule for IP filtering select the relevant rule in the table On the opened page change the needed parameters and click the Change button To remove a rule for IP filtering select the relevant rule in the table On the opened page click the Delete button Virtual Servers On the Firewall Virtual servers page you can create virtual servers for redire...

Page 51: ...virtual server for easier identification You can specify any name Interface A WAN connection to which this virtual server will be assigned Protocol A protocol that will be used by the new virtual server Select a value from the drop down list Public port begin Public port end A port of the router from which traffic is directed to the IP address specified in the Private IP field Specify the start an...

Page 52: ...sting server select the relevant server in the table On the opened page change the needed parameters and click the Change button To remove an existing server select the relevant server in the table On the opened page click the Delete button DMZ A DMZ is a host or network segment located between internal local and external global networks In the router the DMZ implements the capability to transfer ...

Page 53: ...to a port of the device from the router s local network then entering http router_WAN_IP in the address bar users of the external network are directed to the specified port and IP address configured for the virtual server but not to port 80 of the device with the IP address specified on the Firewall DMZ page To disable the DMZ deselect the Enabled checkbox and click the Change button Application R...

Page 54: ...DSL 2520U ADSL2 2 Router with USB and Ethernet Ports User Manual Configuring via Web based Interface Figure 43 The page for adding a rule for the Port Triggering function Page 54 of 67 ...

Page 55: ...e needed value in the Starting port field and leave the Ending port field blank Outgoing port and protocol settings Protocol A protocol to which this rule will be applied upon transferring data from the specified port or port range Starting port Ending port A range of the router s ports from which data are transferred to the external network outgoing traffic Specify the start and the end value for...

Page 56: ...ent bridge the Bridge mode On the Configuration tab you can select the operating mode of the MAC filter Select the Allow value from the Action drop down list to allow traffic affected by the rules from the MAC addresses tab and block the other traffic Select the Deny value from the drop down list to block only traffic affected by the rules from the MAC addresses tab Figure 44 The Firewall MAC filt...

Page 57: ... Ports User Manual Configuring via Web based Interface Figure 45 The Firewall MAC filter page The MAC addresses tab On the opened page specify the needed parameters Figure 46 The page for adding a rule for MAC address based filtering Page 57 of 67 ...

Page 58: ...ocol for which the rule will be applied The Any value means any protocol from those displayed in the list Interface Select a WAN connection with the Bridge connection type only for which the rule will be applied Click the Change button To edit a rule for filtering select the relevant rule on the MAC addresses tab On the opened page change the needed parameters and click the Change button To remove...

Page 59: ...isable URL filter checkbox on the Configuration tab then select a needed mode from the URL filter type drop down list Block listed URLs when this value is selected the router blocks access to all addresses specified on the URL addresses tab Block all URLs except listed when this value is selected the router allows access to addresses specified on the URL addresses tab and blocks access to all othe...

Page 60: ...ddress for the URL filter Enter a URL address in the URL address field specify a port as usual you need to specify port 80 for HTTP then click the Save button To remove an address from the list of URL addresses select the relevant address in the table on the URL addresses tab and click the Delete button To disable the URL filter deselect the Enable Disable URL filter checkbox on the Configuration ...

Page 61: ...irmware of the router and change the password used to access its settings Administrator Password On the System Administrator password page you can change the password for the administrator account used to access the web based interface of the router and to access the device via TELNET For security reasons it is strongly recommended to change the administrator password upon initial configuration of...

Page 62: ...s will be lost upon reboot of the router Factory Click the button to restore the factory default settings Also you can restore the factory defaults via the hardware Reset button see the Saving and Restoring Settings section page 18 Backup Click the button and follow the dialog box appeared to save the configuration all settings of the router to your PC Restore Click the button to upload a previous...

Page 63: ...g from the drop down list Local the system log is stored in the router s memory and displayed on the Log tab When this value is selected the Server address type Server and Port fields are not displayed Remote the system log is sent to the remote host specified in the Server field Local and remote the system log is stored in the router s memory and displayed on the Log tab and sent to the remote ho...

Page 64: ... value to specify a URL address of a remote server Server The IP or URL address of the host from the local or global network to which the system log will be sent Port A port of the host specified in the Server field By default the value 514 is specified After specifying the needed parameters click the Change button To disable logging of the system events deselect the Logging checkbox and click the...

Page 65: ...evice breakdown 1 Download a new version of the firmware from www dlink ru 2 Click the Choose Browse2 button on the System Firmware upgrade page to locate the new firmware file 3 Click the Update button to upgrade the firmware of the router 4 Wait until the router is rebooted about one and a half or two minutes 5 Log into the web based interface using the login admin and the current password 6 Sel...

Page 66: ...tocol IP Internet Protocol IPoA Internet Protocol over ATM IPoE Internet Protocol over Ethernet LAN Local Area Network LCC Logical Link Control LCP Link Control Protocol MAC Media Access Control MTU Maximum Transmission Unit NAT Network Address Translation PBC Push Button Configuration PIN Personal Identification Number PPPoA Point to Point Protocol over ATM PPPoE Point to point protocol over Ethe...

Page 67: ...Router with USB and Ethernet Ports User Manual Abbreviations and Acronyms VC Virtual Circuit VCI Virtual Circuit Identifier VLAN Virtual Local Area Network VPI Virtual Path Identifier WAN Wide Area Network Page 67 of 67 ...

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