TP-Link TL-ER5120 User Manual
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TP-Link TL-ER5120 User Manual

Gigabit load balance broadband router
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TL-ER5120
Gigabit Load Balance Broadband Router
REV2.0.0
1910010931

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Summary of Contents for TP-Link TL-ER5120

  • Page 1 TL-ER5120 Gigabit Load Balance Broadband Router REV2.0.0 1910010931...

  • Page 2: Fcc Statement

    No part of the specifications may be reproduced in any form or by any means or used to make any derivative such as translation, transformation, or adaptation without permission from TP-LINK TECHNOLOGIES CO., LTD. Copyright © 2013 TP-LINK TECHNOLOGIES CO., LTD. All rights reserved. http://www.tp-link.com FCC STATEMENT This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules.

  • Page 3: Safety Information

    Продукт сертифіковано згідно с правилами системи УкрСЕПРО на відповідність вимогам нормативних документів та вимогам, що передбачені чинними законодавчими актами України. Safety Information When product has power button, the power button is one of the way to shut off the product; When there is no power button, the only way to completely shut off power is to disconnect the product or the power adapter from the power source.

  • Page 4: Table Of Contents

    CONTENTS ........................1 Package Contents ....................2 Chapter 1 About this Guide Intended Readers ........................2 Conventions ...........................2 Overview of this Guide ......................2 ......................4 Chapter 2 Introduction Overview of the Router ......................4 Features..........................5 Appearance..........................6 2.3.1 Front Panel ........................6 2.3.2 Rear Panel.........................7 ......................8 Chapter 3 Configuration Network..........................8 3.1.1 Status.........................8...
  • Page 5 3.3.3 Session Limit ......................58 3.3.4 Load Balance......................59 3.3.5 Routing ........................64 Firewall..........................70 3.4.1 Anti ARP Spoofing ....................70 3.4.2 Attack Defense ......................73 3.4.3 MAC Filtering ......................75 3.4.4 Access Control......................76 3.4.5 App Control......................82 Services ..........................84 3.5.1 PPPoE Server......................84 3.5.2 E-Bulletin .........................90 3.5.3 Dynamic DNS ......................91 3.5.4 UPnP ........................97 Maintenance ........................99...
  • Page 6 Configuration........................125 Interface Mode ........................128 Online Help ........................129 Command Introduction.......................131 5.4.1 ip..........................131 5.4.2 ip-mac ........................131 5.4.3 sys .........................132 5.4.4 user........................133 5.4.5 history ........................134 5.4.6 exit .........................135 ................136 Appendix A Hardware Specifications ......................137 Appendix B ....................139 Appendix C Glossary...

  • Page 7: Package Contents

    Package Contents The following items should be found in your box: One TL-ER5120 Router One Power Cord One Console Cable Two mounting brackets and other fittings Quick Installation Guide Resource CD Note: Make sure that the package contains the above items. If any of the listed items are damaged or...

  • Page 8: Chapter 1 About This Guide

    Chapter 1 About this Guide This User Guide contains information for setup and management of TL-ER5120 router. Please read this guide carefully before operation. 1.1 Intended Readers This Guide is intended for Network Engineer and Network Administrator. 1.2 Conventions In this Guide the following conventions are used: The router or TL-ER5120 mentioned in this Guide stands for TL-ER5120 Gigabit Load Balance Broadband Router without any explanation.
  • Page 9 Appendix A Hardware Lists the hardware specifications of this router. Specifications Appendix B FAQ Provides the possible solutions to the problems that may occur during the installation and operation of the router. Appendix C Glossary Lists the glossary used in this guide.

  • Page 10: Chapter 2 Introduction

    Thanks for choosing the Gigabit Load Balance Broadband Router TL-ER5120. 2.1 Overview of the Router The Gigabit Load Balance Broadband Router TL-ER5120 from TP-LINK possesses excellent data processing capability and multiple powerful functions including Load Balance, Access Control, Bandwidth Control, Session Limit, IM/P2P Blocking, PPPoE Server and so on, which consumedly meet the needs of small and medium enterprise, hotels and communities with volumes of users demanding a efficient and easy-to-manage network with high security.

  • Page 11: Features

    + Featured Link Backup to switch all the new sessions from dropped line automatically to another for keeping an always on-line network. Easy-to-use + Providing easy-to-use GUI with clear configuration steps and detailed help information for the users to configure the router simply. + Helping administrators to monitor the whole network status and take actions to malfunctions according to the recorded log information.

  • Page 12: Appearance

    Supports IP-MAC Binding Supports GARP (Gratuitous ARP) Deploys One-Click restricting of IM/P2P applications 2.3 Appearance 2.3.1 Front Panel The front panel of TL-ER5120 is shown as the following figure. LEDs Status Indication The router is powered on The router is powered off or power supply is abnormal...

  • Page 13: Rear Panel

    If the SYS LED is flashing with a high frequency about two or three seconds, it means the router is restored successfully. 2.3.2 Rear Panel The rear panel of TL-ER5120 is shown as the following figure. Power Socket Connect the female connector of the power cord to this power socket, and the male connector to the AC power outlet.

  • Page 14: Chapter 3 Configuration

    Chapter 3 Configuration 3.1 Network 3.1.1 Status The Status page shows the system information, the port connection status and other information related to this router. Choose the menu Network→Status to load the following page. Figure 3-1 Status...

  • Page 15: System Mode

    3.1.2 System Mode The TL-ER5120 router can work in three modes: NAT, Non-NAT and Classic. If your router is hosting your local network’s connection to the Internet with a network topology as the Figure 3-2 shows, you can set it to NAT mode.
  • Page 16 If your router is connected in a combined network topology as the Figure 3-4 shows, you can set it to Classic Mode. Figure 3-4 Network Topology – Classic Mode Choose the menu Network→System Mode to load the following page. Figure 3-5 System Mode You can select a System Mode for your router according to your network need.

  • Page 17: Wan

    3.1.3 WAN 3.1.3.1 WAN Mode TL-ER5120 provides four available WAN ports. You can set the number of WAN ports on this page. Choose the menu Network→WAN→WAN Mode to load the following page. Figure 3-6 WAN Mode -11-...
  • Page 18 Note: ● By default, TL-ER5120 is set to work in the mode of dual WAN ports. ● Any change to the number of WAN ports may lead to a loss of current configurations. Please be sure to backup your configurations in advance.
  • Page 19 Choose the menu Network→WAN→WAN1 to load the configuration page. Static IP If a static IP address has been provided by your ISP, please choose the Static IP connection type to configure the parameters for WAN port manually. Figure 3-7 WAN – Static IP The following items are displayed on this screen: Static IP Connection Type:...
  • Page 20 Primary DNS: Enter the IP address of your ISP’s Primary DNS (Domain Name Server). If you are not clear, please consult your ISP. It’s not allowed to access the Internet via domain name if the Primary DNS field is blank. Secondary DNS: Optional.
  • Page 21 The following items are displayed on this screen: Dynamic IP Connection Type: Select Dynamic IP if your ISP assigns the IP address automatically. Click <Obtain> to get the IP address from your ISP’s server. Click <Release> to release the current IP address of WAN port. Host Name: Optional.
  • Page 22 Dynamic IP Status Status: Displays the status of obtaining an IP address from your ISP. “Disabled” indicates that the Dynamic IP connection type is not applied. “Connecting” indicates that the router is obtaining the IP parameters from your ISP. “Connected” indicates that the router has successfully obtained the IP parameters from your ISP.
  • Page 23 PPPoE If your ISP (Internet Service Provider) has provided the account information for the PPPoE connection, please choose the PPPoE/Russian PPPoE connection type (Used mainly for DSL Internet service). Figure 3-9 WAN - PPPoE The following items are displayed on this screen: -17-...
  • Page 24 PPPoE Settings Select PPPoE/Russian PPPoE if your ISP provides xDSL Virtual Connection Type: Dial-up connection. Click <Connect> to dial-up to the Internet and obtain the IP address. Click <Disconnect> to disconnect the Internet connection and release the current IP address. Account Name: Enter the Account Name provided by your ISP.
  • Page 25 Service Name: Optional. Enter the Service Name provided by your ISP. It's null by default. Enter the IP address of your ISP’s Primary DNS. Primary DNS: Secondary DNS: Optional. Enter the IP address of your ISP’s Secondary DNS. Secondary Connection: Here allows you to configure the secondary connection.
  • Page 26 PPPoE Status Displays the status of PPPoE connection. Status: “Disabled” indicates that the PPPoE connection type is not applied. “Connecting” indicates that the router is obtaining the IP parameters from your ISP. “Connected” indicates that the router has successfully obtained the IP parameters from your ISP. “Disconnected”...
  • Page 27 L2TP If your ISP (Internet Service Provider) has provided the account information for the L2TP connection, please choose the L2TP/Russian L2TP connection type. Figure 3-10 WAN - L2TP -21-...
  • Page 28 The following items are displayed on this screen: L2TP Settings Connection Type: Select L2TP/Russian L2TP if your ISP provides a L2TP connection. Click <Connect> to dial-up to the Internet and obtain the IP address. Click <Disconnect> to disconnect the Internet connection and release the current IP address. Enter the Account Name provided by your ISP.
  • Page 29 IP Address: If Static IP is selected, configure the IP address of WAN port. If Dynamic IP is selected, the IP address of WAN port obtained is displayed. Subnet Mask: If Static IP is selected, configure the subnet mask of WAN port.
  • Page 30 Primary DNS: Displays the IP address of your ISP’s Primary DNS. Secondary DNS: Displays the IP address of your ISP’s Secondary DNS. PPTP If your ISP (Internet Service Provider) has provided the account information for the PPTP connection, please choose the PPTP/Russian PPTP connection type. Figure 3-11 WAN - PPTP The following items are displayed on this screen: -24-...
  • Page 31 PPTP Settings Select PPTP/Russian PPTP if your ISP provides a PPTP Connection Type: connection. Click <Connect> to dial-up to the Internet and obtain the IP address. Click <Disconnect> to disconnect the Internet connection and release the current IP address. Account Name: Enter the Account Name provided by your ISP.
  • Page 32 Subnet Mask: If Static IP is selected, configure the subnet mask of WAN port. If Dynamic IP is select, the subnet mask of WAN port obtained is displayed. Default Gateway: If Static IP is selected, configure the default gateway. If Dynamic IP is selected, the obtained default gateway is displayed.
  • Page 33 BigPond If your ISP (Internet Service Provider) has provided the account information for the BigPond connection, please choose the BigPond connection type. Figure 3-12 WAN – Bigpond The following items are displayed on this screen: BigPond Settings Select BigPond if your ISP provides a BigPond connection. Click Connection Type: <Connect>...
  • Page 34 Password: Enter the Password provided by your ISP. If you are not clear, please consult your ISP. Enter the address of authentication server. It can be IP address or Auth Server: server name. Auth Domain: Enter the domain name of authentication server. It's only required when the address of Auth Server is a server name.

  • Page 35: Lan

    correct and your network is connected well. Consult your ISP if this problem remains. IP Address: Displays the IP address assigned by your ISP. Displays the Subnet Mask assigned by your ISP. Subnet Mask: Default Gateway: Displays the IP address of the default gateway assigned by your ISP.
  • Page 36 Note: If the LAN IP address is changed, you must use the new IP address to log into the router. To guarantee a normal communication, be sure to set the Gateway address and the Subnet Mask of the Hosts on the LAN to the new LAN IP address and the Subnet Mask of the router.

  • Page 37: Dhcp Reservation

    Lease Time: Specify the length of time the DHCP server will reserve the IP address for each computer. After the IP address expired, the client will be automatically assigned a new one. Default Gateway: Optional. Enter the Gateway address to be assigned. It is recommended to enter the IP address of the LAN port of the router.
  • Page 38 Figure 3-16 DHCP Reservation The following items are displayed on this screen: DHCP Reservation MAC Address: Enter the MAC address of the computer for which you want to reserve the IP address. Enter the reserved IP address. IP Address: Description: Optional.

  • Page 39: Dmz

    DMZ (Demilitarized Zone) is a network which has fewer default firewall restrictions than the LAN does. TL-ER5120 provides a DMZ port to allow all the local hosts connected to this port to be exposed to the Internet for some special-purpose services, such as such as Internet gaming and video-conferencing.

  • Page 40: Mac Address

    Choose the menu Network→DMZ→DMZ to load the following page. Figure 3-19 DMZ The following items are displayed on this screen: Status: Activate or inactivate this entry. The DMZ port functions as a normal LAN port when it’s disabled. Select the mode for DMZ port to control the connection way among Mode: DMZ, LAN and Internet.
  • Page 41 TL-ER5120 instead of the current router in a network node, you can just set the MAC address of TL-ER5120 ‘s LAN port the same to the MAC address of the previous router, which can avoid all the devices under this network node to update their ARP binding tables.

  • Page 42: Switch

    To avoid a conflict of MAC address on the LAN, it’s not allowed to set the MAC address of the router’s LAN port to the MAC address of the current management PC. 3.1.7 Switch Some basic switch port management functions are provided by TL-ER5120, which facilitates you to monitor the traffic and manage the network effectively. 3.1.7.1...

  • Page 43: Port Mirror

    The following items are displayed on this screen: Statistics Displays the number of normal unicast packets received or transmitted Unicast: on the port. Broadcast: Displays the number of normal broadcast packets received or transmitted on the port. Displays the number of flow control frames received or transmitted on Pause: the port.
  • Page 44 Figure 3-22 Port Mirror The following items are displayed on this screen: General Enable Port Mirror: Check the box to enable the Port Mirror function. If unchecked, it will be disabled. Mode: Select the mode for the port mirror function. Options include: Ingress: When this mode is selected, only the incoming packets sent by the mirrored port will be copied to the mirroring port.

  • Page 45: Rate Control

    Tips: If both the mirrored port and the mirroring port are the LAN ports, these two LAN ports should be in the same Port VLAN. For example, if port 3 (the mirroring port) and port 4 (the mirrored port) are the LAN ports, the Port Mirror function can take effect only when port 3 and port 4 are in the same Port VLAN.

  • Page 46: Port Config

    Figure 3-23 Rate Control The following items are displayed on this screen: Rate Control Port: Displays the port number. Specify whether to enable the Ingress Limit feature. Ingress Limit: Ingress Mode: Select the Ingress Mode for each port. Options include: All Frames: Select this option to limit all the frames.

  • Page 47: Port Status

    Figure 3-24 Port Config The following items are displayed on this screen: Port Config Status: Specify whether to enable the port. The packets can be transported via this port after being enabled. Flow Control: Allows you to enable/disable the Flow Control function. Select the Negotiation Mode for the port.

  • Page 48: User Group

    LAN. However, hosts in different VLANs cannot communicate with one another directly. Therefore, broadcast packets are limited in a VLAN. TL-ER5120 provides the Port VLAN function, which allows you to create multiple logical VLANs for the LAN ports based on their port numbers.

  • Page 49: Group

    3.2.1 Group On this page you can define the group for management. Choose the menu User Group→Group to load the following page. Figure 3-27 Group Configuration The following items are displayed on this screen: Group Config Specify a unique name for the group. Group Name: Description: Give a description for the group.

  • Page 50: View

    The following items are displayed on this screen: User Config User Name: Specify a unique name for the user. IP Address: Enter the IP Address of the user. It cannot be the network address or broadcast address of the port. Description: Give a description to the user for identification.

  • Page 51: Advanced

    View Config Select the desired view for configuration. View: User Name: Select the name of the desired User. Displays the Groups that the User can join. Available Group: Selected Group: Displays the Groups to which this User belongs. Select the name of the desired Group. Group Name: Group Structure: Click this button to view the tree structure of this group.
  • Page 52 Figure 3-30 NAT Setup The following items are displayed on this screen: NAPT Source Port Range: Enter the source port range between 2049 and 65000, the span of which must be not less than 100. NAT-DMZ NAT-DMZ: Enable or disable NAT-DMZ. NAT DMZ is a special service of NAT application, which can be considered as a default forwarding rule.
  • Page 53 One-to-One NAT Mapping IP Address: Enter the Original IP Address in the first checkbox and Translated IP Address in the second checkbox. TL-ER5120 allows mapping from LAN port to WAN port and DMZ in LAN Mode. Interface: Select an interface for forwarding data packets.
  • Page 54 3.3.1.3 Multi-Nets NAT Multi-Nets NAT functions to allow the IP under LAN or DMZ port within multiple subnets to access the Internet via NAT. Choose the menu Advanced→NAT→Multi-Nets NAT to load the following page. Figure 3-32 Multi-Nets NAT The following items are displayed on this screen: Multi-Nets NAT Subnet/Mask: Enter the subnet/mask to make the address range for the entry.
  • Page 55 Application Example: Network Requirements The LAN subnet of TL-ER5120 is 192.168.0.0 /24, the subnet of VLAN2 under a three layer switch is 192.168.2.0 /24, while the subnet of VLAN3 is 192.168.3.0 /24. The IP of VLAN for cascading the switch to the router is 192.168.0.2. Now the hosts within VLAN2 and VLAN3 desire to access the Internet.
  • Page 56 Configuration procedure Establish the Multi-Nets NAT entries with Subnet/Mask of VLAN2 and VLAN3. The configured entries are as follows: Then set the corresponding Static Route entry, enter the IP address of the interface connecting the router and the three layer switch into the Next Hop field. Choose the menu Advanced→Routing→Static Route to load the following page.

  • Page 57: Virtual Server

    3.3.1.4 Virtual Server Virtual server can be used for setting up public services in your private network, such as DNS, Email and FTP. Virtual server can define a service port. All the service requests to this port will be transmitted to the LAN server appointed by the router via IP address.

  • Page 58: Port Triggering

    Status: Activate or inactivate the entry. Note: ● The External port and Internal Port should be set in the range of 1-65535. ● The external ports of different entries should be different, whereas the internal ports can be the same. List of Rules In this table, you can view the information of the entries and edit them by the Action buttons.
  • Page 59 Port Triggering Enter a name for Port Triggering entries. Up to 28 characters can be Name: entered. Trigger Port: Enter the trigger port number or range of port numbers. Only when the trigger port initiates connection will all the corresponding incoming ports open and provide service for the applications, otherwise the incoming ports will not open.

  • Page 60: Traffic Control

    Choose the menu Advanced→NAT→ALG to load the following page. Figure 3-35 ALG The following items are displayed on this screen: FTP ALG: Enable or disable FTP ALG. The default setting is enabled. It is recommended to keep the default setting if no special requirement.
  • Page 61 Figure 3-36 Configuration The following items are displayed on this screen: General Select this option to disable Bandwidth Control. Disable Bandwidth Control: Enable Bandwidth Select this option to enable Bandwidth Control all the time. Control all the time: With this option selected, the Bandwidth Control will take effect when the Enable Bandwidth Control When:...

  • Page 62: Bandwidth Control

    Interface Bandwidth Interface: Displays the current enabled WAN port(s). The Total bandwidth is equal to the sum of bandwidth of the enabled WAN ports. Displays the bandwidth of each WAN port for transmitting data. The Upstream Bandwidth: Upstream Bandwidth of WAN port can be configured on WAN page. Downstream Displays the bandwidth of each WAN port for receiving data.
  • Page 63 Bandwidth Control Rule Direction: Select the data stream direction for the entry. The direction of arrowhead indicates the data stream direction The DMZ port displays in the drop-down list only when the DMZ port is enabled. WAN-ALL means all WAN ports through which the data flow might pass. Individual WAN port cannot be selected after WAN-ALL rules are added.

  • Page 64: Session Limit

    Note: ● The premise for single rule taking effect is that the bandwidth of the interface for this rule is sufficient and not used up. ● It is impossible to satisfy all the guaranteed bandwidth if the total guaranteed bandwidth specified by all Bandwidth Control rules for certain interface exceeds the physical bandwidth of this interface.

  • Page 65: Load Balance

    Session Limit Group: Select a group to define the controlled user. Max. Sessions: Enter the max. Sessions for the users. Give a description for the entry. Description: Activate or inactivate the entry. Status: List of Session Limit You can view the information of the entries and edit them by the Action buttons. The first entry in Figure 3-38 indicates: The amount of maximum sessions for the hosts within group1 is 100 and this entry is enabled.

  • Page 66: Policy Routing

    Figure 3-40 Configuration With the box before Enable Application Optimized Routing checked, the router will consider the source IP address and destination IP address of the packets as a whole and record the WAN port they pass through. And then the packets with the same source IP address and destination IP address or destination port will be forwarded to the recorded WAN port.

  • Page 67: Link Backup

    The following items are displayed on this screen: General Protocol: Select the protocol for the entry in the drop-down list. If the protocol you want to set is not in the list, you can add it to the list on 3.3.4.4 Protocol page.
  • Page 68 On this page, you can configure the Link Backup function based on actual need to reduce the traffic burden of WAN port and improve the network efficiency. Choose the menu Advanced→Load Balance→Link Backup to load the following page. Figure 3-42 Link Backup The following items are displayed on this screen: General WAN Ports:...
  • Page 69 Timing: Link Backup will be enabled if the specified effective time is reached. All the traffic on the primary WAN will switch to the backup WAN at the beginning of the effective time; the traffic on the backup WAN will switch to the primary WAN at the ending of the effective time.

  • Page 70: Routing

    Figure 3-43 Protocol The following items are displayed on this screen: Protocol Name: Enter a name to indicate a protocol. The name will display in the drop-down list of Protocol on Access Rule page. Enter the Number of the protocol in the range of 0-255. Number: List of Protocol You can view the information of the entries and edit them by the Action buttons.
  • Page 71 Choose the menu Advanced→Routing→Static Route to load the following page. Figure 3-44 Static Route The following items are displayed on this screen: Static Route Destination: Enter the destination host the route leads to. Subnet Mask: Enter the Subnet Mask of the destination network. Enter the gateway IP address to which the packet should be sent next.
  • Page 72 The first entry in Figure 3-44 indicates: If there are packets being sent to a device with IP address of 211.162.1.0 and subnet mask of 255.255.255.0, the router will forward the packets from WAN1 port to the next hop of 211.200.1.1. Application Example Network Requirements LAN1 is under the router and it uses network segment 192.168.0.0 /24.
  • Page 73 (Variable Length Subnet Mask), simple plain text authentication, MD5 cryptograph authentication, CIDR (Classless Inter-Domain Routing) and multicast. TL-ER5120 supports both RIPv1 version and RIPv2 version, thus you can configure the RIP version based on the actual need to improve the network performance.
  • Page 74 Figure 3-45 RIP The following items are displayed on this screen: General Interface: Displays the interfaces which has been physically connected or assigned static IP. Enable or disable RIP protocol. Status: RIP Version: Select RIPv1 or RIPv2. RIPv2 supports multicast and broadcast. If RIPv2 is enabled, set the Password Authentication according to the actual Password network situation, and the password should not be more than 15 characters.
  • Page 75 data via this port. The IP address of next hop is 116.10.1.254 and the hop count is 1. The effective time of this entry is 1 second. Note: ● RIP function cannot be set if the router is in NAT Mode. To set RIP function, please change the System Mode to Routing or Full Mode.

  • Page 76: Firewall

    Metric The Metric of route entry. 3.4 Firewall 3.4.1 Anti ARP Spoofing ARP (Address Resolution Protocol) is used to analyze and map IP addresses to the corresponding MAC addresses so that packets can be delivered to their destinations correctly. ARP functions to translate the IP address into the corresponding MAC address and maintain an ARP Table, where the latest used IP address-to-MAC address mapping entries are stored.

  • Page 77: Arp Scanning

    The following items are displayed on this screen: General It is recommended to check all the options. You should import the IP and MAC address of the host to List of IP-MAC Binding and enable the corresponding entry before enabling “Permit the packets matching the IP-MAC Binding entries only”.

  • Page 78: Arp List

    Figure 3-48 ARP Scanning Enter the start and the end IP addresses in the Scanning IP Range field. Then click the <Scan> button, the router will scan all the active hosts within the scanning range and display the result in the list. The entries displayed on the List of Scanning Result do not mean the IP and MAC addresses are already bound.

  • Page 79: Attack Defense

    Figure 3-49 ARP List The configurations for the entries is the same as the configuration of List of Scanning Result on 3.4.1.2 ARP Scanning page. The unbound IP-MAC information will be replaced by new IP-MAC information or be automatically removed from the list if it has not been communicated with others for a long time. This period is regarded as the aging time of the ARP information.
  • Page 80 Figure 3-50 Attack Defense The following items are displayed on this screen: General Flood attack is a kind of commonly used DoS (Denial of Service), Flood Defense: which including TCP SYN, UDP, ICMP and so on. It is recommended to check all the Flood Defense options and specify the corresponding thresholds.

  • Page 81: Mac Filtering

    Packet Anomaly Packet Anomaly refers to the abnormal packets. It is Defense: recommended to select all the Packet Anomaly Defense options. With this box checked, the router will record the defense logs. Enable Attack Defense Logs: MAC Filtering 3.4.3 On this page, you can control the access to the Internet of local host by specifying their MAC addresses.

  • Page 82: Access Control

    List of Rules You can view the information of the entries and edit them by the Action buttons. 3.4.4 Access Control 3.4.4.1 URL Filtering URL (Uniform Resource Locator) specifies where an identified resource is available and the mechanism for retrieving it. URL Filter functions to filter the Internet URL address, so as to provide a convenient way for controlling the access to Internet from LAN hosts.
  • Page 83 Mode: Select the mode for URL Filtering. “Keywords’’ indicates that all the URL addresses including the specified keywords will be filtered. “URL Path” indicates that the URL address will be filtered only when it exactly matches the specified URL. Effective Time: Specify the time for the entry to take effect.

  • Page 84: Web Filtering

    3.4.4.2 Web Filtering On this page, you can filter the desired web components. Choose the menu Firewall→Access Control→Web Filtering to load the following page. Figure 3-53 Web Filtering Check the box before Enable Web Filtering and select the web components to be filtered. 3.4.4.3 Access Rules Choose the menu Firewall→Access Control→Access Rules to load the following page.
  • Page 85 Access Rules Select a policy for the entry: Policy: Block: When this option is selected, the packets obeyed the rule will not be allowed to pass through the router. Allow: When this option is selected, the packets obeyed the rule will be allowed to pass through the router.
  • Page 86 Priority: Select this option to specify the priority for the added entries. The latest enabled entry will be displayed at the end of the list by default. List of Rules You can view the information of the entries and edit them by the Action buttons. The smaller the value is, the higher the priority is.
  • Page 87 Figure 3-55 Service The following items are displayed on this screen: Service Name: Enter a name for the service. The name should not be more than 28 characters. The name will display in the drop-down list of Protocol on Access Rule page. Protocol: Select the protocol for the service.

  • Page 88: App Control

    App Control 3.4.5 3.4.5.1 Control Rules On this page, you can enable the Application Rules function. Choose the menu Firewall→App Control→Control Rules to load the following page. Figure 3-56 Application Rules The following items are displayed on this screen: General Check the box before Enable Application Control to make the Application Control function take effect.
  • Page 89 The database refers to all the applications in the application list on the Application Rules page, you can download the latest database from http://www.tp-link.com, Click the <Browse> button and select the file, and then click the <Upgrade> button to upgrade the database.

  • Page 90: Services

    3.5 Services 3.5.1 PPPoE Server The router can be configured as a PPPoE server to specify account and IP address to users in LAN and thus you can control the dial-up of users for a high efficiency in network management. The PPPoE configuration can be implemented on General, IP Address Pool, Account, Exceptional IP and List of Account pages.
  • Page 91 Primary/Secondary Enter the Primary/Secondary DNS server address. The default is DNS: 0.0.0.0. Specify the maximum number of the sessions for PPPoE server. The Max Sessions: default is 256. Max Echo-Requests: Specify the maximum number of Echo-Requests sent by the server to wait for response.
  • Page 92 Figure 3-59 IP Address Pool The following items are displayed on this screen: IP Address Pool Pool Name: Specify a unique name to the IP Address Pool for identification and management purposes. Specify the start and the end IP address for IP Pool. The start IP address IP Address Range: should not exceed the end address and the IP address ranges must not overlap.
  • Page 93 Figure 3-60 Account The following items are displayed on this screen: Account Enter the account name. This name should not be the same with the Account Name: one in L2TP/PPTP connection settings. Password: Enter the password. IP Address Assigned Select the IP Address Assigned Mode for IP assignment. Mode: Static: Select this option to assign a static IP address to the client.
  • Page 94 Description: Enter the description for management and search purposes. Up to 28 characters can be entered. Activate or inactivate the entry. Status: MAC Binding: Select a MAC Binding type from the pull-down list. Options include: Disable: Select this option to disable the MAC Binding function. Manual: Select this option to bind the account to a MAC address manually.
  • Page 95 Figure 3-61 Exceptional IP The following items are displayed on this screen: Exceptional IP IP Address Range: Specify the start and the end IP address to make an exceptional IP address range. This range should be in the same IP range with LAN port or DMZ port of the router.

  • Page 96: E-Bulletin

    3.5.2 E-Bulletin With E-Bulletin function, bulletin information can be released to the specified users. On this page you can edit the bulletin content and specify the receiving user group. Choose the menu Services→E-Bulletin to load the following page. Figure 3-63 E-Bulletin The following items are displayed on this screen: General Specify whether to enable electronic bulletin function.

  • Page 97: Dynamic Dns

    Enable Logs: Specify whether to log the E-Bulletin. E-Bulletin Title: Enter a title for the bulletin. Enter the content of the bulletin. Content: Object: Select the object of this bulletin. Options include: ANY: The bulletin will be released to all the users and the PCs on the LAN.
  • Page 98 The router, as a DDNS client, cannot provide DDNS service. Prior to using this function, be sure you have registered on the official websites of DDNS service providers for username, password and domain name. TL-ER5120 router offers PeanutHull DDNS client, Dyndns DDNS client, NO-IP DDNS client and Comexe DDNS client.
  • Page 99 Dyndns DDNS Enter the Account Name of your DDNS account. If you have not registered, Account Name: click <Go to register> to go to the website of Dyndns for register. Password: Enter the password of your DDNS account. Domain Name: Enter the Domain Name that you registered with your DDNS service provider.
  • Page 100 Figure 3-65 NO-IP DDNS The following items are displayed on this screen: No-IP DDNS Enter the Account Name of your DDNS account. If you have not registered, Account Name: click <Go to register> to go to the website of No-IP for register. Password: Enter the password of your DDNS account.
  • Page 101 3.5.3.3 PeanutHull On this page you can configure PeanutHull DDNS client. Choose the menu Services→Dynamic DNS→PeanutHull to load the following page. Figure 3-66 PeanutHull DDNS The following items are displayed on this screen: PeanutHull DDNS Account Name: Enter the Account Name of your DDNS account. If you have not registered, click <Go to register>...
  • Page 102 DDNS Status: Displays the current status of DDNS service Offline: DDNS service is disabled. Connecting: client is connecting to the server. Online: DDNS works normally. Authorization fails: The Account Name or Password is incorrect. Please check and enter it again. Domain Name: Displays the domain names obtained from the DDNS server.

  • Page 103: Upnp

    Comexe DDNS Enter the Account Name of your DDNS account. If you have not registered, Account Name: click <Go to register> to go to the website of Comexe for register. Password: Enter the password of your DDNS account. Domain Name 1: Enter the Domain Name that you registered with your DDNS service provider.
  • Page 104 After UPnP is enabled, all UPnP connection rules will be displayed in the list of UPnP Mapping. Up to 64 UPnP service connections are supported in TL-ER5120. The NO.1 entry in Figure 3-68 indicates: TCP data received on port 12856 of the WAN port in the router will be forwarded to port 12856 in 192.168.0.101 server in LAN.

  • Page 105: Maintenance

    3.6 Maintenance 3.6.1 Admin Setup 3.6.1.1 Administrator On this page, you can modify the factory default user name and password of the router. Choose the menu Maintenance→Admin Setup→Administrator to load the following page. Figure 3-69 Administrator The following items are displayed on this screen: Administrator Current User Name: Enter the current user name of the router.

  • Page 106: Login Parameter

    3.6.1.2 Login Parameter On this page, you can configure and modify the Web and Telnet port. Choose the menu Maintenance→Admin Setup→Login Parameter to load the following page. Figure 3-70 Login Parameter The following items are displayed on this screen: General Enter the Web Management Port for the router.

  • Page 107: Remote Management

    Configuration Procedure Type 210.10.10.0/24 in the Subnet/Mask field on Remote Management page and enable the entry as the following figure shows. Then type the corresponding port number in Web Management Port and Telnet Management Port fields as the following figure shows. Finally, start the web browser and type 210.10.10.50 in the URL field to log in the Web management page of the router.

  • Page 108: Management

    Status: Activate or inactivate the entry. List of Subnet In this list, you can view the Remote Management entries and edit them by the Action buttons. The first entry in Figure 3-71 indicates that: The hosts with IP address in subnet of 192.168.2.0/24 are allowed to access the router and this entry is activated.

  • Page 109: Firmware Upgrade

    Configuration Version Displays the current Configuration version of the router. Export Click the <Export> button to save the current configuration as a file to your computer. You are suggested to take this measure before upgrading or modifying the configuration. Import Click the <Browse>...

  • Page 110: Statistics

    To upgrade the router is to get more functions and better performance. Go to http://www.tp-link.com download the updated firmware. Type the path and file name of the update file into the “File” field. Or click the <Browse> button to locate the update file.
  • Page 111 Bytes Rx: Displays the bytes of packets received on the interface. Bytes Tx: Displays the bytes of packets transmitted on the interface. Advanced WAN Information Interface: Displays the interface. IP Fragment Rx: Displays the amount of IP Fragments received by WAN port. Abnormal IP Packets Rx: Displays the rate for transmitting data frames.

  • Page 112: Diagnostics

    Sorted by: Select the rule for displaying the traffic information. 3.6.4 Diagnostics 3.6.4.1 Diagnostics This router provides Ping test and Tracert test functions for network diagnose. Choose the menu Maintenance→Diagnostics→Diagnostics to load the following page. Figure 3-78 Diagnostics The following items are displayed on this screen: -106-...
  • Page 113 Ping Destination IP/Domain: Enter destination IP address or Domain name here. Then select a port for testing, if you select “Auto”, the router will select the interface of destination automatically. After clicking <Start> button, the router will send Ping packets to test the network connectivity and reachability of the host and the results will be displayed in the box below.

  • Page 114: Time

    Mode: Detect automatically or Manually. In Auto mode, gateway will be selected as destination for PING detection, DNS server of WAN port will be selected as destination for DNS Lookup. In Manual Mode, you can configure the destination for PING and DNS Lookup manually. Ping: Enter the destination IP for Ping in Manual mode.

  • Page 115: Daylight Saving Time

    Config Get UTC: When this option is selected, you can configure the time zone and the IP address for the NTP server. The router will get UTC automatically if it has connected to an NTP server. Time Zone: Select the time zone for the router. Primary/Secondary NTP Server: Enter the IP address or domain name of the NTP server.

  • Page 116: Logs

    Daylight Saving Time(DST) Config DST Status: Enable or disable the DST. Predefined Mode: Select a predefined DST configuration. USA: Second Sunday in March, 02:00 ~ First Sunday in November, 02:00. European: Last Sunday in March, 01:00 ~ Last Sunday in October, 01:00.
  • Page 117 Figure 3-82 Logs List of Logs List of Logs displays the system log information in log buffer. An entry of log contains the following four parts: Config Enable Auto-refresh: With this option selected, the page will refresh automatically every 5 seconds.

  • Page 118: Chapter 4 Application

    Chapter 4 Application 4.1 Network Requirements The company has established the server farms in the headquarters to provide the Web, Mail and FTP services for all the staff. The dedicated line access service was used by this company, which costs greatly in network maintain and cable layout.

  • Page 119: Internet Connection

    enables you to set the connection of WAN1 as the main line and the connection of WAN2 as the backup line, which allows the router to switch to the connection of WAN2 once the connection of WAN1 is broken down. The detailed configurations are as follows. 4.2.1.1 System Mode Set the system mode of the router to the NAT mode.
  • Page 120 Figure 4-3 WAN – Static IP 4.2.1.4 Link Backup Set the connection of WAN1 as the primary link, the connection of WAN 2 as the secondary link. Choose the menu Advanced→Load Balance→Link Backup to load the configuration page. Select WAN1 as Primary WAN, WAN2 as Backup WAN, select the Failover mode as Figure 1-2 shows, and then click the <Add>...

  • Page 121: Network Management

    4.2.2 Network Management To manage the enterprise network effectively and forbid the Hosts within the IP range of 192.168.0.30-192.168.0.50 to use IM/P2P application, you can set up a User Group and specify the network bandwidth limit and session limit for this group. The detailed configurations are as follows. 4.2.2.1 User Group Create a User Group with all the Hosts in the IP range of 192.168.0.30-192.168.0.50 as its group...
  • Page 122 Figure 4-6 User Config - Batch View Choose the menu User Group→View to load the configuration page. Add all the Users you just created into the Group 1 and click the <Save> button to apply. 4.2.2.2 App Control Choose the menu Firewall→App Control→Control Rules to load the configuration page. Check the box before Enable Application Control and click <Save>...
  • Page 123 Figure 4-7 App Rules 4.2.2.3 Bandwidth Control To enable Bandwidth Control, you should configure the total bandwidth of interfaces and the detailed bandwidth control rule first. Enable Bandwidth Control Choose the menu Advanced→Traffic Control→Setup to load the configuration page. Check the box before Enable Bandwidth Control and click the <Save>...
  • Page 124 Interface Bandwidth Choose the menu Network→WAN→WAN1 to load the configuration page. Configure the Upstream Bandwidth and Downstream Bandwidth of the interface as Figure 4-9 shows. The entered bandwidth value should be consistent with the actual bandwidth value. Bandwidth Control Rule Choose the menu Advanced→Traffic Control→Bandwidth Control to load the configuration page.

  • Page 125: Network Security

    Max. Sessions: Status: Activate Click the <Add> button to apply. Figure 4-11 Session Limit 4.2.3 Network Security You can enable the IP-MAC Binding function to defend the ARP attack from local or public network and enable Sending GARP packets function to defend ARP attack. Moreover, you can enable DoS Defense function to implement flood defense and Packet Anomaly Defense.
  • Page 126 Figure 4-13 Scanning Result Choose the menu Firewall→Anti ARP Spoofing→IP-MAC Binding to load the configuration page. Select the ARP entries needed to be bound or click the <Select All> button, and then click the <Import>button. The ARP List will display as the following figure shows. Figure 4-14 ARP List Set IP-MAC Binding Entry Manually Configure the IP-MAC Binding entry manually and add it to ARP List.
  • Page 127 Figure 4-15 IP-MAC Binding 4.2.3.2 WAN ARP Defense To prevent the WAN ARP attack, you can bind the default gateway and IP address of WAN port. Obtain the MAC address of WAN port by ARP Scanning first. Choose the menu Firewall→Anti ARP Spoofing→ARP Scanning to load the configuration page. Enter the default gateway of the WAN port such as 58.51.128.254 in the Scanning Range field and click the <Scan>...

  • Page 128: Traffic Monitoring

    Figure 4-16 Attack Defense 4.2.3.4 Traffic Monitoring Port Mirror Choose the menu Network→Switch→Port Mirror to load the configuration page. Check the box before Enable Port Mirror and select the Ingress&Egress mode. Select the Port 5 for the Mirroring Port and the Port 3 and the Port 4 for the Mirrored ports. Click the <Save> button to apply. -122-...
  • Page 129 Figure 4-17 Port Mirror Statistics Choose the menu Maintenance→Statistics to load the page. Load the Interface Traffic Statistics page to view the traffic statistics of each physical interface of the router as Figure 4-18 shows. Figure 4-18 Interface Traffic Statistics Load the IP Traffic Statistics page, and Check the box before Enable IP Traffic Statistics and Enable Auto-refresh, then click the <Save>...
  • Page 130 Figure 4-19 IP Traffic Statistics After all the above steps, the enterprise network will be operated based on planning. -124-...

  • Page 131: Chapter 5 Cli

    Chapter 5 CLI TL-ER5120 provides a Console port for CLI (Command Line Interface) configuration, which enables you to configure the router by accessing the CLI from console (such as Hyper Terminal) or Telnet. The following part will introduce the steps to access CLI via Hyper Terminal and some common CLI commands.
  • Page 132 Figure 5-2 Connection Description Select the port (The default port is COM1) to connect in Figure 5-3, and click OK. Figure 5-3 Select the port to connect Configure the port selected in the step above as the following Figure 5-4 shows. Configure Bits per second as 115200, Data bits as 8, Parity as None, Stop bits as 1, Flow control as None, and then click OK.
  • Page 133 Figure 5-4 Port Settings Choose File → Properties → Settings on the Hyper Terminal window as Figure 5-5 shows, then choose VT100 or Auto detect for Emulation and click OK. Figure 5-5 Connection Properties Settings -127-...

  • Page 134: Interface Mode

    Figure 5-6 Log in the Router 5.2 Interface Mode The CLI of TL-ER5120 offers two command modes: User EXEC Mode and Privileged EXEC Mode. User EXEC Mode only allows users to do some simple operations such as view the system information, while Privileged EXEC Mode allows you to manage and configure the router.

  • Page 135: Online Help

    Accessing Path Prompt Logout or Access the next mode User EXEC Primary mode once TP-LINK > Use the exit command to disconnect Mode connected with the router. the router (except that the router is connected through Console port). Use the enable command to access Privileged EXEC mode.
  • Page 136 For example: ←Press Space and ? button TP-LINK > ip - Get the ip configuration Type a character string and a question mark with no space, all the commands with prefix of this character string will be listed.

  • Page 137: Command Introduction

    5.4 Command Introduction TL-ER5120 provides a number of CLI commands for users to manage the router and user information. For better understanding, each command is followed by notes which will be the meaning of the command. 5.4.1 ip The ip command is used to view or configure the IP address and subnet mask of the interfaces. View command can be used in both User EXEC Mode and Privileged EXEC Mode while configuration function can be only used in Privileged EXEC Mode.

  • Page 138: Sys

    ● The parameters in the brackets are default setting and you can enter the actual parameters behind them. Press Enter key directly if there are no changes. ● TL-ER5120 connects to the FTP server using port 21 by default. -132-...

  • Page 139: User

    Pay special attention that the specified account must be with appropriate permissions since the functions such as export, import and firmware upgrade require read-write operation on FTP server. TP-LINK # sys import config Import the configuration file. Server address: [192.168.1.101] The steps are as the above item shows.

  • Page 140: History

    TP-LINK > user get Query the user name and password current Username: admin Guest. Password: admin TP-LINK > user set password Modify the password of the Guest. Enter old password: Enter new password: Confirm new password: TP-LINK # user get...

  • Page 141: Exit

    TP-LINK > history View the history command. 1. history 2. sys show 3. history TP-LINK > history clear Clear the history command. 1. history 2. sys show 3. history 4. history clear 5.4.6 exit The exit command is used to exit the system only when logging in by Telnet.

  • Page 142: Appendix A Hardware Specifications

    Appendix A Hardware Specifications IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, TCP/IP, DHCP, ICMP, NAT, Standards PPPoE, SNTP, HTTP, DNS One 10/100/1000M Auto-Negotiation WAN RJ45 port (Auto MDI/MDIX) Three adjustable 10/100/1000M Auto-Negotiation WAN/LAN RJ45 ports (Auto MDI/MDIX) Ports One 10/100/1000M Auto-Negotiation LAN RJ45 port (Auto MDI/MDIX) One Console Port 10Base-T: UTP/STP of Cat.

  • Page 143: Appendix Bfaq

    192.168.0.x ("x" is any number between 2 to 254) for the IP address and 255.255.255.0 for the Subnet Mask. Test the connection between your PC and TL-ER5120 via Ping command. If you still cannot access the configuration page, please restore your router to its factory default settings and try to log in again.
  • Page 144 Q3: What can I do if the router with the remote management function enabled cannot be accessed by the remote computer? Make sure that the IP address of the remote computer is in the subnet allowed to remotely access the router. If the router’s management port has been modified, please log into the router with the new address, such as http://192.168.0.1:XX (“XX”...

  • Page 145: Glossary

    Appendix C Glossary Glossary Description Application Level Gateway (ALG) is application specific translation agent that allows an application on a host in one ALG （ Application Layer address realm to connect to its counterpart running on a host in Gateway） different realm transparently.
  • Page 146 Glossary Description H.323 allows dissimilar communication devices to communicate with each other by using a standardized communication H.323 protocol. H.323 defines a common set of CODECs, call setup and negotiating procedures, and basic data transport methods. The protocol used by Web browsers and Web servers to HTTP（Hypertext Transfer transfer files, such as text and graphic files.
  • Page 147 Glossary Description Standardized data link layer address that is required for every port or device that connects to a LAN. Other devices in the MAC address（Media network use these addresses to locate specific ports in the Access Control address） network and to create and update routing tables and data structures.
  • Page 148 Glossary Description TCP（Transfer Control Connection-oriented transport layer protocol that provides Protocol） reliable full-duplex data transmission. TCP/IP（Transmission Common name for the suite of protocols to support the Control Protocol/ Internet construction of worldwide Internetworks. TCP and IP are the two Protocol） best-known protocols in the suite.

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