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Summary of Contents for D-Link DSL-2520U

• Page 1 User Manual DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports August 2011..

• Page 2: Table Of Contents

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Contents Chapter 1. Introduction.....4 Contents and Audience......4 Conventions.......4 Document Structure......4 Chapter 2. Overview.....5 General Information......5 Specifications.......6 Product Appearance......9 Front Panel........9 Back Panel........10 Delivery Package......11 Safety Instructions......11 Chapter 3. Installation and Connection...12 Before You Begin......12..
• Page 3 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User 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: Chapter 1. Introduction

  Chapter 2 gives an overview of the router's hardware and software features and describes its appearance and the package contents, and provides safety instructions. Chapter 3 explains how to install the router DSL-2520U and configure a PC in order to access its web-based interface.

• Page 5: Chapter 2. Overview

  LAN. You can configure and manage the settings of the router DSL-2520U via the user-friendly web- based interface (the interface is available in several languages).

• Page 6: Specifications

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Overview User Manual Specifications Interfaces: • ADSL: 1 RJ-11 port • LAN: 1 RJ-45 10/100BASE-TX Fast Ethernet port with auto-MDI/MDIX • USB: 1 port 1.1, type B. ADSL Standards: • ADSL: ◦ full rate ANSI T1.413 Issue 2, ITU-T G.992.1 (G.dmt) Annex A, ITU-T G.992.2 (G.lite) Annex A, ITU-T G.994.1 (G.hs).
• Page 7 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Overview User Manual Network Protocols and Functions: • Static IP routing • NAT • DHCP server/client/relay • DNS relay • DDNS • UPnP • Support of VLAN • IGMP proxy. Firewall and Access Management Functions: •..
• Page 8 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Overview User Manual Power: • External power adapter DC 5V/1A • ON/OFF power switch • Reset to Factory Defaults button. Operating Temperature: • From 0 C to 40 C (from 32 F to 104..

• Page 9: Product Appearance

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Overview User Manual Product Appearance Front Panel Figure 1. Front panel view. Mode Description The router is powered on. Solid green Power No light The router is powered off. The router is in the crash recovery mode.

• Page 10: Back Panel

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Overview User Manual Back Panel Figure 2. Back panel view. Port Description A DSL port to connect the router to the telephone line. A USB port to connect to a single computer.

• Page 11: Delivery Package

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Overview User Manual Delivery Package The following should be included: Router DSL-2520U • Power adapter DC 5V/1A • RJ-11 telephone cable • Straight-through Ethernet cable (CAT 5E) • USB cable • Splitter •..

• Page 12: Chapter 3. Installation And Connection

  Please, read this manual prior to installing the device. Make sure that you have all the necessary information and equipment. Operating System Configuration of the router DSL-2520U (hereinafter referred to as “the router”) is performed via the built-in web-based interface. The web-based interface is available from any operating system that supports a web browser.

• Page 13: Connecting To Pc (in Os Windows Xp)

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Installation and Connection User Manual Connecting to PC (in OS Windows XP) PC with Ethernet Adapter 1. Make sure that your PC is powered off. 2. Connect an Ethernet cable between the Ethernet port located on the back panel of the router and the Ethernet port of your PC.

• Page 14: Obtaining Ip Address Automatically

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Installation and Connection User Manual Obtaining IP Address Automatically 1. Click the Start button and proceed to the Control Panel > Network and Internet Connections > Network Connections window. 2. In the Network Connections window, right-click the relevant Local Area Connection icon and select the Properties line in the menu displayed.
• Page 15 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Installation and Connection User Manual 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 16: Connecting To Web-based Interface

  2. In the address bar of the web browser, enter the IP address of the router (by default, the 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).
• Page 17 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Installation and Connection User Manual Figure 8. The system statistics page. For security reasons, it is strongly recommended to change the administrator password upon initial configuration of the router. To do this, proceed to the System / Administrator password page.

• Page 18: Saving And Restoring Settings

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Installation and Connection User Manual Saving and Restoring Settings Note that you should regularly save the changes of the router's settings to the non- volatile memory. The router's web-based interface displays the notification on unsaved changes at the top of the page.

• Page 19: Chapter 4. Configuring Via Web-based Interface

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual CHAPTER 4. CONFIGURING WEB-BASED INTERFACE Status This menu displays data on the current state of the router. The following data are represented: connection status, active WAN connections, IP addresses leased by DHCP server, the routing table, network statistics, and data on network devices connected to the router.

• Page 20: Dsl Status

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual 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 21: Wan Status

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual WAN Status The Status / WAN status page displays active WAN connections. Figure 14. The Status / WAN status page. Page 21 of 67..

• Page 22: Dhcp

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual 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).

• Page 23: Routing Table

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual 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 24: Lan Clients

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual LAN Clients On the Status / LAN clients page, you can 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.

• Page 25: Net

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual In this menu you can configure basic parameters of the router's local area network and configure connection to the Internet (a WAN connection). Connections On the Net / Connections page, you can create and edit connections used by the router.

• Page 26: Editing Local Interface Parameters

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual 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.

• Page 27: Physical Layer

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description General settings Name A name for this connection. Connection Type The type of network protocol used by this connection – IPoE. Enable The checkbox enabling this connection.
• Page 28 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description An operating mode of the router's DHCP server. Enable: the router assigns IP addresses to clients automatically in accordance with specified parameters. When this value is selected, the Start IP, End IP, and the Lease time fields are displayed on the tab.
• Page 29 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual On the Static DHCP tab, you can specify MAC address and IP address pairs. The tab is active when the router's DHCP server is enabled. Figure 21. The tab for configuring MAC-IP pairs.

• Page 30: Creating Adsl Wan Connection

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual 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 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description General settings Name A name for connection for easier identification. A type of network protocol to be used by the connection. Available values: PPPoA •..
• Page 32 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description A class of traffic for this connection. (Unspecified Bit Rate): The UBR service is used for applications that allow various delays and losses of packets. It is appropriate to..
• Page 33 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description VLAN settings Use VLAN Select the checkbox to allow the router to apply VLAN tagging. VLAN priority A priority tag for the type of traffic transmitted.
• Page 34 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual The PPP settings section is displayed for the PPPoE and PPPoA connection types. Figure 24. The page for creating a new connection. The PPP settings section.
• Page 35 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description Select the checkbox if you want the router to establish connection to the Internet on demand. In the Maximum idle time field, specify Dial on demand a period of inactivity (in seconds) after which the connection should be terminated.
• Page 36 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual The IP settings section is displayed for the IPoE and IPoA connection types. Figure 25. The page for creating a new connection. The IP settings section.

• Page 37: Advanced

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Advanced This menu provides advanced settings of the router. On the pages of this menu, you can define static routes and rules for remote access to the web-based interface, add name servers, enable the UPnP function, define interface groups, configure a DDNS service, and edit the ADSL connection parameters.

• Page 38: Interface Grouping

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Interface Grouping On the Advanced / Interface grouping page, you can assign virtual PVC connections to the router's ports (create groups of interfaces), which allows distinguishing different types of traffic.
• Page 39 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual You can specify the following parameters: Parameter Description A name for the group for easier identification. You can specify any Name name. The list of available internal interfaces is displayed in the left LANs column of the line.

• Page 40: Ddns

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual 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.
• Page 41 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Figure 30. The page for adding a DDNS service. You can specify the following parameters: Parameter Description DDNS Service Select a DDNS provider from the drop-down list.

• Page 42: Dns

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual On the Advanced / DNS page, you can add DNS servers to the system. Figure 31. The Advanced / DNS page. DNS servers are used to determine the IP address from the name of a server in Intranets or the Internet (as a rule, they are specified by an ISP or assigned by a network administrator).

• Page 43: Routing

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual 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.
• Page 44 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Figure 33. The page for adding a static route. You can specify the following parameters: Parameter Description Destination network A destination network to which this route is assigned.

• Page 45: Adsl

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual 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.

• Page 46: Remote Access

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Remote Access On the Advanced / Remote access 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.
• Page 47 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Figure 36. The page for adding a rule for remote management. You can specify the following parameters: Parameter Description A name for the rule for easier identification. You can specify any Name name.

• Page 48: Firewall

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Firewall In this menu you can configure the firewall of the router: add rules for IP filtering, define a DMZ- zone, create virtual servers, configure MAC-filters and the Port Triggering function.
• Page 49 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Figure 38. The page for adding a rule for IP filtering. You can specify the following parameters: Parameter Description IP-filter rule editing Name A name for the rule for easier identification.

• Page 50: Virtual Servers

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description A port of the source IP address. You can specify one port, several Source ports separated by a comma, or a range of ports separated by a colon.
• Page 51 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Figure 40. The page for adding a virtual server. You can specify the following parameters: Parameter Description Select a virtual server template from the drop-down list, or select..

• Page 52: Dmz

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description A port of the IP address specified in the Private IP field to which traffic is directed from the Public port. Specify the start and the Private port (begin)/ end value for the port range.

• Page 53: Application Rules

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Note that when the DMZ is enabled, all traffic coming to a port of the WAN interface of the router is directed to the same port of the specified IP address. Also note that virtual servers have higher priority than the DMZ host.
• Page 54 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Figure 43. The page for adding a rule for the Port Triggering function. Page 54 of 67..
• Page 55 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual You can specify the following parameters: Parameter Description Application rule editing Rules name A name for the rule for easier identification. Interface A WAN connection to which this rule will be assigned.

• Page 56: Mac Filter

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual MAC Filter The MAC-address-based filtering allows forwarding and blocking traffic subject to the source and destination MAC addresses. MAC-address-based filtering is active only when the device is configured as a transparent bridge (the Bridge mode).
• Page 57 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual 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 58 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description Source MAC-address The MAC address of the source host. Destination MAC-address The MAC address of the destination host. Direction Select a direction for which the rule will be applied.

• Page 59: Control

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Control This menu is designed to limit access to certain web sites. URL Filter On the Control / URL-filter page, you can specify restrictions on access to certain web sites.
• Page 60 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Figure 48. The Control / URL-filter page. The URL-addresses tab. On the opened page, specify the needed parameters. Figure 49. The page for adding an address for the URL filter.

• Page 61: System

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual System In this menu you can save the changed settings to the non-volatile memory, create a backup of the router's configuration, restore the router's configuration from a previously saved file, restore the factory default settings, view the system log, update the firmware of the router, and change the password used to access its settings.

• Page 62: Configuration

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Configuration On the System / Configuration page, you can save the changed settings to the non-volatile memory, restore the factory defaults, backup the current configuration, or restore the router's configuration from a previously created file.

• Page 63: System Log

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual System Log On the System / System log page, you can set the system log options and configure sending the system log to a remote host.
• Page 64 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Control Description Select a type of messages and alerts/notifications to be sent to the remote host specified in the Server field. The field is available, Remote logging level when the Remote or Local and remote value is selected from the Logging type drop-down list.

• Page 65: Firmware Upgrade

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Firmware Upgrade On the System / Firmware upgrade page, you can upgrade the firmware of the router. Figure 54. The System / Firmware upgrade page. The current version of the router's firmware is displayed in the Firmware version field on the Start page.

• Page 66: Chapter 5. Abbreviations And Acronyms

  DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Abbreviations and Acronyms User Manual CHAPTER 5. ABBREVIATIONS AND ACRONYMS Address Resolution Protocol DDNS Dynamic Domain Name System DDoS Distributed Denial of Service DHCP Dynamic Host Configuration Protocol DeMilitarized Zone Domain Name System..
• Page 67 DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Abbreviations and Acronyms User Manual Virtual Circuit Virtual Circuit Identifier VLAN Virtual Local Area Network Virtual Path Identifier Wide Area Network Page 67 of 67..