TP-Link TL-ER5120 TL-ER5120 User Guide
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- TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 1
TL-ER5120 Gigabit Load Balance Broadband Router Rev: 1.0.0 1910010517 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 2
TP-LINK TECHNOLOGIES CO., LTD. Copyright © 2011 TP-LINK TECHNOLOGIES CO., LTD. All rights reserved. http://www.tp-link.com FCC STATEMENT This equipment has been tested if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 3
Intended Readers ...2 1.2 Conventions ...2 1.3 Overview of this Guide ...2 Chapter 2 Introduction ...4 2.1 Overview of the Router ...4 2.2 Features...5 2.3 Appearance...6 2.3.1 Front Panel ...6 2.3.2 Rear Panel...7 Chapter 3 Configuration ...9 3.1 Network...9 3.1.1 Status...9 3.1.2 System Mode...10 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 4
...59 3.3.4 Load Balance...60 3.3.5 Routing ...65 3.4 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 3.5 Services ...84 3.5.1 PPPoE Server...84 3.5.2 E-Bulletin ...90 3.5.3 Dynamic DNS ...92 3.5.4 UPnP - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 5
5.1 Configuration...124 5.2 Interface Mode ...127 5.3 Online Help ...128 5.4 Command Introduction...129 5.4.1 ip...130 5.4.2 ip-mac ...130 5.4.3 sys ...130 5.4.4 user...132 5.4.5 history ...133 5.4.6 exit ...134 Appendix A Hardware Specifications 135 Appendix B FAQ ...136 Appendix C Glossary 138 - - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 6
The following items should be found in your box: ¾ One TL-ER5120 Router ¾ One power cord ¾ One console cable ¾ Two mounting brackets and other fittings ¾ Installation Guide ¾ Resource CD for TL-ER5120 Router, including: • This User Guide • Other Helpful Information Note: Make sure that the package - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 7
are used: ¾ The Router or TL-ER5120 mentioned in this Guide stands for TL-ER5120 Gigabit Load Balance Broadband Router without any explanation. ¾ Menu Name→Submenu Name→Tab page indicates the menu structure. Advanced→NAT →Basic NAT means the Basic NAT page under the NAT menu option that is located - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 8
Appendix A Hardware Specifications Appendix B FAQ Appendix C Glossary Lists the hardware specifications of this Router. Provides the possible solutions to the problems that may occur during the installation and operation of the router. Lists the glossary used in this guide. -3- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 9
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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 10
IP, PPPoE/Russian PPPoE, L2TP/Russian L2TP, PPTP/Russian PPTP, Dual Access, BigPond Internet connections ¾ Supports Virtual Server, Port Triggering, ALG, Static Route and RIP v1/v2 ¾ Built-in Switch supporting Port Mirror, Port VLAN, Rate Control and so on ¾ Supports to change the MAC address - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 11
Defense ¾ Supports IP-MAC Binding ¾ Supports GARP (Gratuitous ARP) ¾ 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. z LEDs LED PWR SYS Link/Act Speed Status Indication On The Router is powered - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 12
5 Console / The DMZ port is for connecting the Router to the servers The Console port is for connecting with the serial port of a computer or terminal to monitor and configure the Router z Reset button Use the button to restore the Router to the factory defaults. With the Router powered on, use - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 13
Note: Please use only the power cord provided with this Router. -8- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 14
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. -9- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 15
Figure 3-1 Status 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 shown, you can set it to NAT mode. -10- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 16
network environment with a network topology as the Figure 3-3 shown, and forwards the packets between these two networks by the Routing rules, you can set it to Non-NAT mode. Figure 3-3 Network Topology - Non-NAT Mode If your Router is connected in a combined network topology as the Figure 3-4 shown - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 17
is translated back for delivery within the internal network. However, the Router will drop all the packets whose source IP addresses are in different subnet of LAN port. For example: If the LAN port of the Router is set to 192.168.0.1 for IP address and 255.255.255.0 for the Subnet Mask, then the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 18
transmitted based on the static routing rules and the unmatched ones will be dropped. In this way, the Router can implement NAT for the packets without blocking the packets in the different subnet of the ports. 3.1.3 WAN 3.1.3.1 WAN Mode TL-ER5120 provides four available WAN ports. You can set the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 19
of the other WAN ports, please refer to the instructions of WAN1. Choose the menu Network→WAN→WAN1 to load the configuration page. 1) 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. -14- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 20
network. It can be set in the range of 576-1500. The default MTU is 1500. It is recommended to keep the default value if no other MTU value is provided by your ISP. Primary DNS: Enter the IP address of your ISP's Primary DNS (Domain Name Server). If you are not clear, please consult your - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 21
Secondary DNS: Optional. If a Secondary DNS Server address is available, enter it. Upstream Bandwidth: Specify the bandwidth for transmitting packets on the port. Downstream Bandwidth: Specify the bandwidth for receiving packets on the port. 2) Dynamic IP If your ISP (Internet Service Provider - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 22
: Select Dynamic IP if your ISP assigns the IP address automatically. Click to get the IP address from your ISP's server. Click to release the current IP address of WAN port. Host Name: Optional. This field allows you to give a name for the Router. It's blank by default. MTU - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 23
your ISP. z "Disconnected" indicates that the IP address has been manually released or the request of the Router gets no response from your ISP. Please check your network connection and consult your ISP if this problem remains. IP Address: Displays the IP address assigned by your ISP. Subnet Mask - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 24
Settings Connection Type: Select PPPoE if your ISP provides xDSL Virtual Dial-up connection. Click to dial-up to the Internet and obtain the IP address. Click to disconnect the Internet connection and release the current - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 25
by default. Service Name: Optional. Enter the Service Name provided by your ISP. It's null by default. Primary DNS: Enter the IP address of your ISP's Primary DNS. Secondary DNS: Optional. Enter the IP address of your ISP's Secondary DNS. Secondary Connection: Here allows you to configure the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 26
type. Options include Disable, Dynamic IP and Static IP. IP Address: If Static IP is selected, configure the IP address of WAN port. If Dynamic IP is selected, the obtained IP address of WAN port is displayed. Subnet Address: If Static IP is selected, configure the subnet address of WAN port. If - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 27
this problem remains. IP Address: Displays the IP address assigned by your ISP. Gateway Address: Displays the Gateway Address assigned by your ISP. Primary DNS: Displays the IP address of your ISP's Primary DNS. Secondary DNS: Displays the IP address of your ISP's Secondary DNS. 4) L2TP If - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 28
Type: Select L2TP if your ISP provides a L2TP connection. Click to dial-up to the Internet and obtain the IP address. Click to disconnect the Internet connection and release the current IP address. Account Name: Enter the Account Name provided by your ISP. If you are -23- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 29
Options include Disable, Dynamic IP and Static IP. 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. If Dynamic IP - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 30
has been manually terminated or the request of the Router has no response from your ISP. Please ensure that your settings are correct and your network is connected well. Consult your ISP if this problem remains. IP Address: Displays the IP address assigned by your ISP. Primary DNS: Displays the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 31
this screen: ¾ PPTP Settings Connection Type: Select PPTP if your ISP provides a PPTP connection. Click to dial-up to the Internet and obtain the IP address. Click to disconnect the Internet connection and release the current - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 32
connection type. Options include Disable, Dynamic IP and Static IP. 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. If Static IP is selected, configure the subnet mask of WAN port. If Dynamic IP is select - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 33
has been manually terminated or the request of the Router has no response from your ISP. Please ensure that your settings are correct and your network is connected well. Consult your ISP if this problem remains. IP Address: Displays the IP address assigned by your ISP. Primary DNS: Displays the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 34
. Click to disconnect the Internet connection and release the current IP address. Account Name: Enter the Account Name provided by your ISP. If you are not clear, please consult your ISP. Password: Enter the Password provided by your ISP. If you are not clear, please consult your - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 35
physical network. It can be set in the range of 576-1500. The default MTU is 1500. Upstream/Downstream Specify the Upstream/Downstream Bandwidth for the Bandwidth: port. To make "Load Balance" and "Bandwidth Control" take effect, please set these parameters correctly. ¾ BigPond Status Status - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 36
, you can configure the parameters for LAN port of this router. Choose the menu Network→LAN→LAN to load the following page. Figure 3-12 LAN The following items are displayed on this screen: ¾ LAN IP Address: Enter the LAN IP address of the Router. 192.168.0.1 is the default IP address. The Hosts - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 37
3.1.4.2 DHCP The Router with its DHCP (Dynamic Host Configuration Protocol) server enabled can automatically assign an IP address to the computers in the LAN. Choose the menu Network→LAN→DHCP to load the following page. Figure 3-13 DHCP Settings The following items are displayed on this screen: ¾ - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 38
the IP address of the LAN port of the Router. Default Domain: Optional. Enter the domain name of your network. Primary DNS: Optional. Enter the Primary DNS server address provided by your ISP. It is recommended to enter the IP address of the LAN port of the Router. Secondary DNS: Optional. If - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 39
edit them by the Action buttons. Up to 512 DHCP static address entries can be supported for LAN and DMZ separately by this Router. The first entry in Figure 3-15 indicates: The IP address 192.168.0.101 is reserved for the computer with the MAC address 00-19-66-83-53-CF, and this entry is - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 40
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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 41
Internet. Options include: Public and Private. IP Address: Enter the IP address of DMZ port. Subnet Mask: Enter the Subnet Mask of DMZ port. Tips: The DHCP service, DHCP Client and DHCP Reservation functions are available when the DMZ port is enabled. For the configuration instructions, please - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 42
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. Set the MAC Address for WAN port: In the condition that your ISP has bound the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 43
. Note: 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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 44
untagged frame this Router can support is 1518 forward copies of packets from one/multiple ports (mirrored port) to a specific port (mirroring port). Usually, the mirroring port is connected to a data diagnose device, which is used to analyze the mirrored packets for monitoring and troubleshooting - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 45
unchecked, it will be disabled. Mode: Select the mode for the port mirror function. Options include: z Ingress: When this mode is selected, only the incoming packets sent by the mirrored port will be copied to the mirroring port. z Egress: When this mode is selected, only the outgoing packets sent - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 46
sent by port 1, port 2, port 3 and port 5 (mirrored ports) will be copied to port 4 (mirroring port). 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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 47
each port. Options include: z All Frames: Select this option to limit all the frames. z Broadcast&Multicast: Select this option to limit 1Mbps. 3.1.7.4 Port Config On this page, you can configure the basic parameters for the ports. Choose the menu Network→Switch→Port Config to load the following - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 48
Mode: Select the Negotiation Mode for the port. All Ports: Allows you to configure the parameters for all the ports at one time. 3.1.7.5 Port Status On this page, you can view the current status of each port. Choose the menu Network→Switch→Port Status to load the following page. Figure 3-24 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 49
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. Choose the menu Network→Switch→Port VLAN to load the following page. Figure 3-25 Port VLAN The following items are displayed - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 50
the menu User Group→Group to load the following page. Figure 3-26 Group Configuration The following items are displayed on this optional. ¾ List of Group In this table, you can view the information of the Groups and edit them by the Action buttons. 3.2.2 User On this page, you can configure - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 51
the IP Address of the user. It cannot be the network address or broadcast address of the port. Give a description to the user for identification. It's optional. In this table, you can view the information of the Users and edit them by the Action buttons. 3.2.3 View On this page, you can configure - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 52
since the address of LAN host never appears on the Internet. 3.3.1.1 NAT Setup On this page, you can set up the NAT function. Choose the menu Advanced→NAT→NAT Setup to load the following page. Figure 3-29 NAT Setup The following items are displayed on this screen: ¾ NAPT Source Port Range: Enter - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 53
, you can configure the One-to-One NAT. Choose the menu Advanced→NAT→One-to-One NAT to load the following page. 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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 54
The first entry in Figure 3-29 indicates: The IP address of host1 in local network is 1.1.1.1 and the WAN IP address after NAT mapping is specified to be 2.2.2.2. The data packets are transmitted from WAN1 port. DMZ Forwarding and this entry are both activated. Note: One-to-One NAT entries take - TP-Link TL-ER5120 | TL-ER5120 User Guide - 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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 56
Establish the Multi-Nets NAT entries with Subnet/Mask of VLAN2 and VLAN3. The configured entries are as follows: 2. 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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 57
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. Choose the menu Advanced→NAT→Virtual Server to load the following page. Figure 3-31 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 58
named host1, all the TCP data packets from Internet to port 65534-65535 of the Router will be redirected to the port 65534-65535 of the LAN host with IP address of 192.168.0.103, and this entry is activated. 3.3.1.5 Port Triggering Some applications require multiple connections, like Internet games - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 59
such as 8690-8696. ● The Router supports up to 16 Port Triggering entries. Each entry supports at most 5 groups of trigger ports and overlapping between the ports is not allowed. ● Each entry supports at most 5 groups of incoming ports and the sum of incoming ports you set for each entry should not - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 60
recommended to keep default if no special requirement. 3.3.2 Traffic Control Traffic Control functions to control the bandwidth by configuring rules for limiting various data flows. In this way, the network bandwidth can be reasonably distributed and utilized. 3.3.2.1 Setup Choose the menu Advanced - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 61
Control When: bandwidth usage reaches the specified value. ¾ Default Limit Limited Bandwidth: Default Limit applies only for users that are not constrained by Bandwidth Control Rules. These users share certain bandwidth with upper limit configured here. Value 0 means all the remained bandwidth is - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 62
The Downstream Bandwidth of WAN port can be configured on WAN page. Note: ● The Upstream/Downstream Bandwidth of WAN port you set must not be more than the bandwidth provided by ISP. Otherwise the Traffic Control will be invalid. ● If there are data flowing into the Router from interface A and out - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 63
pass. Individual WAN port cannot be selected after WAN-ALL rules are added. Group: Select the group to define the controlled users. Mode: Individual: The bandwidth of each user equals to the current bandwidth of this entry. Shared: The total bandwidth of all controlled IP addresses equals to the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 64
port is disabled, it is only allowed deleting operation to the related rules. 3.3.3 Session Limit The amount of TCP and UDP sessions supported by the Router page, you can configure the session limit to specified PCs. Choose the menu Advanced→Session Limit→Session Limit to load the following page. - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 65
the button to get the latest information. 3.3.4 Load Balance On this part, you can configure how the traffic load is shared by the WAN ports to optimize the resource utilization. 3.3.4.1 Configuration Choose the menu Advanced→Load Balance→Configuration to load the following page. -60- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 66
same source IP address and destination IP address or destination port will be forwarded to the recorded WAN port. This feature is to ensure the multi-connected applications to work properly. Check the box before Enable Bandwidth Based Balance Routing and select the WAN port below, Load Balance of - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 67
.168.0.199 and Destination IP between 116.10.20.28 and 116.10.20.29 will be forwarded from WAN1 port, regardless of the port and protocol. This entry is activated d and will take effect at 8 am to 10 pm from Monday to Friday. 3.3.4.3 Link Backup With Link Backup function, the Router will switch all - TP-Link TL-ER5120 | TL-ER5120 User Guide - 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 3-40 Link Backup The following items are displayed on this - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 69
the protocol for routing rules conveniently. A protocol constitutes of the name and number. The Router predefines three commonly used protocols such as TCP, UDP and TCP/UDP. Moreover, you can also add new protocols as your wish. Choose the menu Advanced→Load Balance→Protocol to load the following - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 70
of special routing configured by the administrator, which is simple, efficient, and reliable. Commonly used in small-sized network with fixed topology, Static Route does not change along with the network topology automatically. The administrator should modify the static route information manually as - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 71
Hop: Enter the gateway IP address to which the packet should be sent next. Interface: Select the physical network interface, through which this route is accessible. Metric: Defines the priority of the route. The smaller the value is, the higher the priority is. The default value is 0. Keep the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 72
.168.2.0/24. Meanwhile, the WAN ports of the two routers are interconnected and within the same network. Now a host under TL-ER5120 and within network of LAN1 desires to communicate with the host within network of LAN2. You can set a Static Route entry: Enter the WAN IP address of R1 (116.31.88.16 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 73
, 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. Choose the menu Advanced→Routing→RIP to load the following page. Figure 3-43 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 74
IP as next hop and forward 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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 75
route entry. 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 with false IP address-to-MAC address mapping entries, and then the device will automatically update the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 76
ARP Logs, and the Router will send ARP logs to the specified server. The IP address of server is the Server IP set on 3.6.6 Logs. ¾ IP-MAC Binding IP Address: Enter the IP Address to be bound. MAC Address: Enter the MAC Address corresponding to the IP Address. Description: Give a description - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 77
restore the Router to factory default and login again. 3.4.1.2 ARP Scanning ARP Scanning feature enables the Router to scan the IP address and corresponding MAC address and display them on the List of Scanning Result. Choose the menu Firewall→Anti ARP Spoofing→ARP Scanning to load the following - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 78
manually on 3.4.1.1 IP-MAC Binding. 3.4.1.3 ARP List On this page, the IP-MAC information of the hosts which communicated with the Router recently will be saved in the ARP list. Choose the menu Firewall→Anti ARP Spoofing→ARP List to load the following page. Figure 3-47 ARP List The configurations - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 79
on this screen: ¾ General Flood Defense: Flood attack is a kind of commonly used DoS (Denial of Service), which including TCP SYN, UDP, ICMP and so on. It is recommended to check all the Flood Defense options and specify the corresponding thresholds. Keep the default settings if you are -74- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 80
Defense options. Enable Attack With this box checked, the Router will record the defense logs. Defense Logs: 3.4.3 MAC Filtering On this page, you can control the access to the Internet of local host by specifying their MAC addresses. Choose the menu Firewall→MAC Filtering→MAC Filtering to load - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 81
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. Choose the menu Firewall→Access Control→URL Filtering to load the following page. Figure 3-50 URL Filtering The following items are - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 82
'' 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 www.aabbcc.com and downloading the files with suffix of "exe". Configuration Procedure: Select Keywords mode and type "exe" in the field, - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 83
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 3-51 Web Filtering Check the box before Enable Web Filtering and select the web components to be filtered. 3.4.4.3 Access Rules - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 84
the Router. y Allow: When this option is selected, the packets obeyed the rule will be allowed to pass through the Router. Service: Select the service for the entry. Only the service belonging to the specified service type is limited by the entry. For example, if you select "Block" for Policy and - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 85
entries, including the following two ways: y IP/MASK: Enter an IP address or subnet mask. ("0.0.0.0/32" means any IP is acceptable). y ANY: means for any users. Specify the time for the entry to take effect. Give a description for the entry. Select this option to specify the priority for the added - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 86
, the default Policy is Allow. ● To specify all IP addresses, type "0.0.0.0 / 32" in the Policy field. ● For detailed setting of subnet mask, please refer to Appendix B FAQ. 3.4.4.4 Service The Service function allows you to specify the protocol and port number i to be filtered for Firewall function - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 87
entries and edit them by the Action buttons. Note: The service types predefined by the system cannot be modified. 3.4.5 App Control 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. -82- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 88
: Click the button to select applications from the popup checkbox. The applications include IM, Web IM, SNS, P2P, Media, Basic and Proxy. The default setting is to limit all the applications in the application list except for Basic and Proxy. -83- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 89
the latest database from http://www.tp-link.com, Click the button and select the file, and then click the button to upgrade the database. 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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 90
Primary/Secondary DNS server address. The default is 0.0.0.0. Max Sessions: Specify the maximum number of the sessions for PPPoE server. The default is 256. Max Echo-Requests: Specify the maximum number of Echo-Requests sent by the server to wait for response. The default is 10. The link will be - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 91
Timeout field. The default value is 30. password in plain text. z MS-CHAP, put forward by Microsoft, adopts a different encryption algorithm of CHAP. z MS-CHAP v2 IP Address Pool On this page, you can define or edit the IP Address Pool. Choose the menu Services→PPPoE Server→IP Address Pool to load - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 92
the end address and the IP address ranges must not overlap. In this table, you can view the information of IP Address Pools and edit them by the Action buttons. 3.5.1.3 Account On this page, you can configure the PPPoE account. Choose the menu Services→PPPoE Server→Account to load the following - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 93
L2TP/PPTP connection settings. Password: Enter the password. IP Address Assigned Mode: Select the IP Address Assigned Mode for IP assignment. z Static: Select this option to assign a static IP address to the client. z Dynamic: Select this option to assign available IP addresses to the client - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 94
a MAC Binding type from the pull-down list. Options include: z Disable: Select this option to disable the MAC Binding function. z Manual: Select this option to bind the account to a MAC address manually. Only from the Host with this MAC address can the account log on to the server. z Automatical - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 95
: 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. The start IP address should not exceed the end address and the IP address ranges must not overlap. Description: Give a description - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 96
Figure 3-61 E-Bulletin The following items are displayed on this screen: ¾ General Enable E-Bulletin: Specify whether to enable electronic bulletin function. Interval: Specify the interval to release the bulletin. Enable Logs: Specify whether to log the E-Bulletin. ¾ E-Bulletin Title: Enter - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 97
the object of this bulletin. Options include: z ANY: The configuration for groups and users, please refer to the User Group section. 3.5.3 Dynamic DNS DDNS (Dynamic DNS) service allows you to assign a fixed domain name to a dynamic WAN IP address, which enables the Internet hosts to access the Router - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 98
, password and domain name. TL-ER5120 Router offers PeanutHull DDNS client, Dyndns DDNS client, NO-IP DDNS client and Comexe DDNS client. The Dynamic DNS can be implemented on DynDNS DDNS, No-IP DDNS, Peanuthull DDNS and Comexe DDNS pages. 3.5.3.1 DynDNS On this page, you can configure DynDNS - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 99
this page you can configure NO-IP DDNS client. Choose the menu Services→Dynamic DNS→No-IP to load the following page. Figure 3-63 NO-IP DDNS The following items are displayed on this screen: ¾ No-IP DDNS Account Name: Password: Domain Name: DDNS Service: WAN Port: Enter the Account Name of your - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 100
this page you can configure PeanutHull DDNS client. Choose the menu Services→Dynamic DNS→PeanutHull to load the following page. Figure 3-64 PeanutHull DDNS The following items are displayed on this screen: ¾ PeanutHull DDNS Account Name: Password: DDNS Service: WAN Port: Service Type: Enter the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 101
service z Offline: DDNS service is disabled. z Connecting: client is connecting to the server. z Online: DDNS works normally. z Authorization fails: The Account Name or Password this page you can configure Comexe DDNS client. Choose the menu Services→Dynamic DNS→Comexe to load the following page. - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 102
this port, so that the functions limited to NAT can work normally. For example, MSN Messenger installed in Windows XP and Windows ME system is using UPnP protocol when audio and video communications are processing. On this page you can configure UPnP service. Choose the menu Services→UPnP to load - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 103
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 3-66 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. Note: ● When using UPnP - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 104
and password must not exceed 31 characters in length and must consist of numbers or letters. All the fields are case-sensitive. 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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 105
The default Web Management Port is 80. If the port is changed, you should type "http://IP address: port" to login the Router. E.g.: If the Web Management Port is the IP address within 210.10.10.0/24 segment to manage the Router with IP address of 210.10.10.50 remotely. Configuration Procedure Type - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 106
Maintenance→Management→Factory Defaults to load the following page. Figure 3-70 Factory Defaults Click the button to reset all configuration settings to their default values. The default IP address is 192.168.0.1; the default login user name and password are both admin - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 107
the current Configuration version of the Router. ¾ Export Click the 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. ¾ Import Click the button to locate the update file for - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 108
while rebooting. 3.6.2.4 Firmware Upgrade Choose the menu Maintenance→Management →Firmware Upgrade to load the following page. Figure 3-73 Firmware Upgrade To upgrade the Router is to get more functions and better performance. Go to http://www.tp-link.com to download the updated firmware. Type the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 109
by WAN port. Abnormal IP Packets Rx: Displays the rate for transmitting data frames. 3.6.3.2 IP Traffic Statistics IP Traffic Statistics screen displays the detailed traffic information of each PC on LAN or DMZ. Choose the menu Maintenance→Statistics→IP Traffic Statistics to load the following - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 110
enable or disable IP Traffic Statistics. Allows you to enable/disable refreshing the IP Traffic Statistics automatically. The default refresh interval is This Router provides Ping test and Tracert test functions for network diagnose. Choose the menu Maintenance→Diagnostics→Diagnostics to load the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 111
3-76 Diagnostics The following items are displayed on this screen: ¾ 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 button - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 112
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. 0.0.0.0 means PING detection is disabled - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 113
IP address of DNS server in Manual mode. 0.0.0.0 means DNS Lookup is disabled. Displays the detected WAN port. Displays whether the Online Detection is enabled. Display the detecting results. 3.6.5 Time System Time is the time displayed while the Router is running. On this page you can configure - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 114
: Manual: Synchronize PC'S Clock: with When this option is selected, you can configure the time zone and the IP Address for the NTP Server. The Router will get GMT automatically if it has connected to a NTP Server. z Time Zone: Select your local time. z Primary/Secondary NTP Server: Enter the IP - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 115
Send System Logs: Select Send System Logs and specify the server IP, then the new added logs will be sent to the specified server. The Logs of switch are classified into the following eight levels. Severity emergencies - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 116
line access service but maintained port of this Router. To log in to the Router, the IP address of your PC should be in the same subnet of the LAN port of this Router. (The default subnet of LAN port is 192.168.0.0/24.). The IP address of your PC can be obtained automatically or configured manually - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 117
4-2 WAN Mode 4.2.1.3 Internet Connection Configure the Static IP connection type for the WAN1 and WAN2 ports of the Router. Choose the menu Network→WAN→WAN1 to load the following page. Select the Static IP connection type and enter the IP address, Subnet Mask and Default Gateway provided by your ISP - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 118
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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 119
Group Config z User Choose the menu User Group→User to load the configuration page. Click the button to enter the batch processing screen. Then continue with the following settings: Settings: Action: Start IP Address: End IP Address: Prefix Username: Start No.: Step: Add 192.168.0.30 192 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 120
Users you just created into the Group 1 and click the 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 to apply. Then continue with the following settings - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 121
the total bandwidth of interfaces and the detailed bandwidth control rule first. 1) 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 button to apply. Figure 4-8 Bandwidth - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 122
: LAN -> WAN1 group1 Individual 100 800 Keep the default value Activate Click the button to apply. Figure 4-10 Bandwidth Control Rule 4.2.2.4 Session Limit Choose the menu Advanced→Session Limit→Session Limit to load the configuration page. Check the box before Enable Session Limit and - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 123
by ARP Scanning. For some special items not bound, you can bind them manually. 1) Scan and import the entries to ARP List Specify ARP Scanning range. Choose the menu Firewall→Anti ARP Spoofing→ARP Scanning to load the configuration page. No ARP attack in the local network is the premise of ARP - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 124
. Figure 4-14 ARP List 2) Set IP-MAC Binding Entry Manually Configure the IP-MAC Binding entry manually and add it to ARP List. Choose the menu Firewall→Anti ARP Spoofing→IP-MAC Binding to load the configuration page. To add the host with IP address of 192.168.1.20 and MAC address of 00-11-22-33-44 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 125
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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 126
Traffic Monitoring 1) 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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 127
Figure 4-17 Port Mirror 2) 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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 128
Figure 4-19 IP Traffic Statistics After all the above steps, the enterprise network will be operated based on planning. -123- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 129
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 - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 130
Figure 5-2 Connection Description 4. 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 5. 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, - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 131
Figure 5-4 Port Settings 6. 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 -126- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 132
7. The DOS prompting "TP-LINK>" will appear after pressing the Enter button in the Hyper Terminal window as Figure 5-6 shows. 5.2 Interface Mode Figure 5-6 Log in the Router The CLI of TL-ER5120 offers two command modes: User EXEC Mode and Privileged EXEC Mode. User EXEC Mode only allows users to - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 133
Console port). Enter the disable command to return to User EXEC mode. As Figure 5-7 shown: 5.3 Online Help Figure 5-7 Interface Mode TL-ER5120 functions with CLI Online Help: 1) Type a question mark to get all commands of this view and their brief description in either mode. TP-LINK > ←Type - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 134
brief descriptions will display. For example: TP-LINK > ip ←Press Space and ? button get - Get the ip configuration 3) Type a character string and a TP-LINK # enable ←Press Space and ? button 5.4 Command Introduction TL-ER5120 provides a number of CLI commands for users to manage the Router - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 135
used in Privileged EXEC Mode. TP-LINK > ip get lan Lan Ip: 192.168.0.1 Lan Mask: 255.255.255.0 Get the configuration information of LAN port. TP-LINK # ip set lan address 192.168.0.20 TP-LINK # ip set lan mask 255.255.0.0 Set the LAN IP address of the Router as 192.168.0.20. Operation succeeded - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 136
default. Y means YES, N means NO. This command will restore system, Continue?[Y/N] TP-LINK # sys export config Server address: [192.168.1.101]192.168.1.100 Username: [admin]ftp Password: [admin]ftp File name: [config.bin] Export the configuration file. Example: There is a FTP server with IP - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 137
system information. The current CPU Usage of the system will display. TP-LINK # sys update Server address: [192.168.1.101] Username: [admin] Password: [admin] File name: [update.bin] Upgrade the firmware. Try to get the update file < update.bin > ... Get update file < update bin > succeed, file - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 138
password: Modify the password of the Guest. TP-LINK # user get Username: admin Password: admin Query the user name and password of the Administrator. TP-LINK # user set password Enter old password: Enter new password: Confirm new password: Modify the password of the Administrator. TP-LINK - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 139
> history 1. history 2. sys show 3. history View the history command. TP-LINK > history clear 1. history 2. sys show 3. history 4. history clear Clear the history command. 5.4.6 exit The exit command is used to exit the system only when logging in by Telnet. TP-LINK > exit Exit CLI. -134- - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 140
Specifications Standards IEEE 802.3、IEEE 802.3u、IEEE 802.3x、TCP/ IP、DHCP、ICMP、NAT、 PPPoE、SNTP、HTTP、DNS One 10/100/1000M Auto-Negotiation WAN RJ45 port (Auto MDI/MDIX) Ports Three adjustable 10/100/1000M Auto-Negotiation WAN/LAN RJ45 ports (Auto MDI/MDIX) One 10/100/1000M Auto-Negotiation LAN - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 141
the IP address and 255.255.255.0 for the Subnet Mask. 3) Test the connection between your PC and TL-ER5120 via Ping command. 4) If you still cannot access the configuration page, please restore your Router to its factory default settings and try to log in again. 2. If your management port has been - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 142
the Virtual Server function. If so, you should make a change in the router's management port or virtual server's service port. 4. Make sure that the NAT DMZ service is disabled. Q4: Some function of the Router need to define the IP address subnet with Subnet Mask. What are the common values of the - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 143
）optional anti-replay services. AH is embedded in the data to be protected (a full IP datagram). DDNS （ Dynamic Domain The capability of assigning a fixed host and domain name to a Name Server） dynamic Internet IP address. DHCP （ Dynamic Host A protocol that automatically configure the TCP/IP - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 144
Key Exchange） IKE establishes a shared security policy and authenticates keys for services (such as IPSec) that require keys. Before any IPSec traffic can be passed, each Router/firewall/host must verify the identity of its peer. IPsec（IP Security） A framework of open standards that provides - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 145
transmitted. NAT（Network Address Translator） N Mechanism for reducing the need for globally unique IP addresses. NAT allows an organization with addresses that are not globally SA （Security Association） two network entities to support secure communication. S TCP（Transfer Control Protocol） - TP-Link TL-ER5120 | TL-ER5120 User Guide - Page 146
and the location of an information resource object on the Internet Group of devices on one or more LANs that are configured (using management software) so that they can communicate as VLAN（ Virtual Local Area if they were attached to the same wire, when in fact they are V Network） located on
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TL-ER5120
Gigabit Load Balance Broadband Router
Rev: 1.0.0
1910010517