User Manual DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports August 2011
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................................................
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.....................................................
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Introduction User Manual CHAPTER 1. INTRODUCTION Contents and Audience This manual describes the router DSL-2520U and explains how to configure and operate it. This manual is intended for users familiar with basic networking concepts, who create an in-home local area network, and system administrators, who install and configure networks in offices. Conventions Example Description text The body text of the manual.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual CHAPTER 2. Overview OVERVIEW General Information The DSL-2520U device is an affordable high-end ADSL router developed for home and SOHO (Small Office/Home Office) networks. It provides fast and simple broadband access to the Internet and a shared connection for multi users.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Overview 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). • 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports 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: • NAT firewall • Stateful Packet Inspection (SPI) • URL filter • Packet filtering (IP/ICMP/TCP/UDP) • Virtual servers • Prevention of DoS attacks • Intrusion detection system • DMZ • Port Triggering.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Power: • External power adapter DC 5V/1A • ON/OFF power switch • Reset to Factory Defaults button. Operating Temperature: • From 0 0C to 40 0C (from 32 0F to 104 0F). Storage Temperature: • From -20 0C to 65 0С (from -4 0F to 149 0F). Humidity: • From 5% to 95% non-condensing.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Overview User Manual Product Appearance Front Panel Figure 1. Front panel view. LED Power Status LAN USB DSL Internet Mode Description Solid green The router is powered on. No light The router is powered off. Solid red The router is in the crash recovery mode. Blinking green Traffic (Internet traffic) is passing through the router. No light A failure of the system. Solid green A device is connected to the port.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Overview User Manual Back Panel Figure 2. Back panel view. Port Description DSL A DSL port to connect the router to the telephone line. USB A USB port to connect to a single computer. LAN An Ethernet port to connect a computer/switch. A button to restore the factory default settings. RESET To restore the factory defaults, push the button (with the device turned on), hold it for 10 seconds, and then release the button.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Overview 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 • CD-ROM with “User Manual” and “Quick Installation Guide” • “Quick Installation Guide” (brochure).
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual CHAPTER 3. Installation and Connection INSTALLATION AND CONNECTION Before You Begin 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Installation and Connection 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. 3. Connect a phone cable between the DSL port of the router and the ADSL OUT port of the splitter. Connect your phone to the PHONE port of the splitter.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Installation and Connection 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. Figure 3. The Network Connections window. 3.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Installation 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Installation and Connection Connecting to Web-based Interface When you have configured your computer, you can access the web-based interface and configure needed parameters (for example, create an interface to connect to the Internet, specify the settings of the firewall, edit the password for the administrator account, etc.) 1. Start a web browser (see the Before You Begin section, page 12). 2.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Installation and Connection 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. 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Installation and Connection Saving and Restoring Settings ! Note that you should regularly save the changes of the router's settings to the nonvolatile memory. The router's web-based interface displays the notification on unsaved changes at the top of the page. Figure 10. The notification on unsaved changes. You can save the router's settings via the top-page menu displayed when the mouse pointer is over the System caption. Figure 11.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual CHAPTER 4. CONFIGURING INTERFACE VIA WEB-BASED Status This menu displays data on the current state of the router. The following data are represented: DSL 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual WAN Status The Status / WAN status page displays active WAN connections. Figure 14. The Status / WAN status page.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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. 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface Net 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. By default, the LAN connection is configured in the system. It corresponds to the local interface of the router (br0). You cannot delete this connection.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description General settings Name Connection Type Enable Direction A name for this connection. The type of network protocol used by this connection – IPoE. The checkbox enabling this connection. The direction of this connection. Physical layer Physical interface The physical interface to which this connection is assigned – br0. IP settings IP Address The router's IP address.
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. Mode 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. If the DHCP server is enabled, you can also specify MACIP pairs on the Static DHCP tab.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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. 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.
DSL-2520U ADSL2/2+ Router with 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.
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: Connection Type Enable Direction • PPPoA • PPPoE • IPoE • IPoA • Bridge. Select the checkbox to enable the connection. The direction of this connection.
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. UBR (Unspecified Bit Rate): The UBR service is used for applications that allow various delays and losses of packets. It is appropriate to use the UBR service for text/data/image transfer applications, as well as messaging, distribution, retrieval, and remote terminal applications.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description VLAN settings Use VLAN VLAN priority VLAN ID Select the checkbox to allow the router to apply VLAN tagging. A priority tag for the type of traffic transmitted. An identifier for the VLAN. The Miscellaneous section is displayed for all connection types except for Bridge. Figure 23. The page for creating a new connection. The Miscellaneous section.
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. Parameter Description PPP settings PPP Username Without authorization Password Password confirmation A username (login) to access the Internet. Select the checkbox if you don't need to enter a username and password to access the Internet.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Description Dial on demand Select the checkbox if you want the router to establish connection to the Internet on demand. In the Maximum idle time field, specify a period of inactivity (in seconds) after which the connection should be terminated. MTU The maximum size of units transmitted by the interface. PPP IP extension This option is used by some ISPs.
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. Parameter Description IP settings Displayed for the IPoE type only. Obtain an IP address automatically Select the checkbox to configure automatic IP address assignment for this connection.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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. UPnP On the Advanced / UPnP page, you can enable the UPnP function.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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. This function is mostly used in Triple-play networks. Figure 27. The Advanced / Interface grouping page.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface You can specify the following parameters: Parameter Description Name A name for the group for easier identification. You can specify any name. LANs The list of available internal interfaces is displayed in the left column of the line. Use the button ==> to select interfaces. The selected interfaces will be displayed in the right column of the field.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface Figure 30. The page for adding a DDNS service. You can specify the following parameters: Parameter DDNS Service Description Select a DDNS provider from the drop-down list. Host name The domain name registered at your DDNS provider. User name The username to authorize for your DDNS provider. User password The password to authorize for your DDNS provider.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface DNS 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). The device performs the DNS relay function, i.e., it redirects the DNS requests of users to external DNS servers.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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.
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. Destination netmask The destination network mask. Gateway An IP address through which the destination network can be accessed. Metric A metric for the route.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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. Figure 35. The Advanced / Remote access page. To create a new rule, click the Add button.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface Figure 36. The page for adding a rule for remote management. You can specify the following parameters: Parameter Description Name A name for the rule for easier identification. You can specify any name. Interface A physical interface through which the web-based interface of the router is accessed. IP address Mask Protocol A host or a subnet to which the rule is applied. The mask of the subnet.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface Firewall In this menu you can configure the firewall of the router: add rules for IP filtering, define a DMZzone, 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.
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 Protocol A name for the rule for easier identification. A protocol for network packet transmission. Select a value from the drop-down list.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface Parameter Description Source A port of the source IP address. You can specify one port, several ports separated by a comma, or a range of ports separated by a colon. Destination A port of the destination IP address. You can specify one port, several ports separated by a comma, or a range of ports separated by a colon. Click the Change button.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface Figure 40. The page for adding a virtual server. You can specify the following parameters: Parameter Description Template Select a virtual server template from the drop-down list, or select Custom to specify all parameters of the new virtual server manually. Name A name for the virtual server for easier identification. You can specify any name.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Parameter Private port (begin)/ Private port (end) Private IP 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 end value for the port range. If you need to specify one port, enter the needed value in the Private port (begin) field and leave the Private port (end) field blank.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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.
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.
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 Interface A name for the rule for easier identification. A WAN connection to which this rule will be assigned. Incoming port and protocol settings Protocol Starting port/ Ending port A protocol to which this rule will be applied upon receiving data to the specified port or port range.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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). On the Configuration tab, you can select the operating mode of the MAC filter.
DSL-2520U ADSL2/2+ Router with USB and Ethernet 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Parameter Source MAC-address Configuring via Web-based Interface Description 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. Protocol Select a protocol for which the rule will be applied. The value means any protocol from those displayed in the list.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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. Figure 47. The Control / URL-filter page. The Configuration tab.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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. 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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.
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. Figure 51. The System / Configuration page.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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. Figure 52. The System / System log page. The Configuration tab. To enable logging of the system events, select the Logging checkbox on the Configuration tab. Then specify the needed parameters. Control Description Select a type of logging from the drop-down list.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports Configuring via Web-based Interface User Manual Control Description Remote logging level Select a type of messages and alerts/notifications to be sent to the remote host specified in the Server field. The field is available, when the Remote or Local and remote value is selected from the Logging type drop-down list.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual Configuring via Web-based Interface 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.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual CHAPTER 5.
DSL-2520U ADSL2/2+ Router with USB and Ethernet Ports User Manual VC Virtual Circuit VCI Virtual Circuit Identifier VLAN Virtual Local Area Network VPI Virtual Path Identifier WAN Wide Area Network Page 67 of 67 Abbreviations and Acronyms
