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Syswan Duolinks SW24 Series User Manual

Load balancers
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Duolinks SW24 Series

User Guide

Syswan Technologies, Inc.
2050 Beavercreek Rd, Suite 101 #388
Oregon City, OR 97045 USA
1 - 877 - 6 - SYSWAN
www.syswan.com

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Summary of Contents for Syswan Duolinks SW24 Series

  • Page 1: User Guide

    Duolinks SW24 Series User Guide Syswan Technologies, Inc. 2050 Beavercreek Rd, Suite 101 #388 Oregon City, OR 97045 USA 1 - 877 - 6 - SYSWAN www.syswan.com...

  • Page 2: Copyright And Trademarks

    Copyright and Trademarks Copyright © 2007-2008 Syswan Technologies, Inc. All rights reserved. Brands and product names are trademarks or registered trademarks of their respective holders. Specifications are subject to change without notice. V1/RBEN...

  • Page 3: Table Of Contents

    Overview... 25 Port Options... 25 Load Balancing ... 28 Advanced PPPoE ... 30 Advanced PPTP ... 33 4. ADVANCED CONFIGURATION... 35 Overview... 35 Host IP Setup... 35 Routing ... 38 Virtual Servers ... 39 User Guide © Syswan Technologies, Inc.
  • Page 4 7. QOS CONFIGURATION ... 73 Overview... 73 QoS Setup ... 73 QoS Policy Configuration ... 74 8. DNS CONFIGURATION... 76 Overview... 76 Configure DNS... 77 Map Host URL ... 79 9. MANAGEMENT ASSISTANT ... 81 User Guide © Syswan Technologies, Inc.
  • Page 5 NAT Status ... 97 APPENDIX A SPECIFICATIONS ... 99 APPENDIX B WINDOWS TCP/IP SETUP... 100 Overview... 100 TCP/IP Settings ... 100 APPENDIX C TROUBLESHOOTING ... 107 Overview... 107 General Problems... 107 Internet Access ... 107 User Guide © Syswan Technologies, Inc.

  • Page 6: Purpose

    Purpose This document explains how to configure and use the Duolinks SW24 Series Load Balancers to optimize your Internet activities. Audience This document is intended for all users of the Duolinks SW24 Series Load Balancers, from high level administrators to end-users having basic knowledge of computers and the Internet.

  • Page 7: Introduction

    Congratulations on purchasing your Syswan Duolinks SW24 Series Load Balancer. The Duolinks SW24 Series Load Balancers provides uninterrupted Internet connectivity for multiple computers for SOHO, SMB and corporate networks. This chapter briefly describes the features of the Duolinks SW24 Series Load Balancers with more detailed information in the chapters ahead. Overview The Syswan Technologies Duolinks SW24 Series high performance Dual WAN router provides a fast, secure and reliable connection to the Internet.
  • Page 8 The Duolinks SW24 VPN Plus can host up to 6 domains (SOA entries). It offers up to 2 local or remote mail exchange (MX) entries and up to 30 different services (type A DNS entries) per domain, each pointing to one or more servers on your local network.

  • Page 9: Main Features

    Internet phone, video conference,. etc. UPnP (Universal Plug and Play) By enabling UPnP (Universal Plug & Play), the Duolinks SW24 Series Load Balancer will become one of the network devices. Useful for discovery and control of network devices, such as Internet gateways.

  • Page 10: Internet Sharing Features

    This feature is available only on the Syswan Duolinks SW24 VPN Plus Load Balancer. The Duolinks SW24 VPN Plus has a built in DNS server. This feature allows you to setup DNS and to provide Inbound and outbound load balancing features to users.

  • Page 11: Other Features

    GUI. You may optionally deactivate this feature and use a classic (HTTP) access if needed. • Remote Management The Duolinks SW24 Series Load Balancer can be managed from any PC on your LAN. If an Internet connection exists, it can also (optional) be configured via the Internet. • Password protected Configuration Optional password protection is provided to prevent unauthorized users from modifying the configuration data and settings.
  • Page 12 Generates real time system information on a web page or sends system logs to a syslog server. Useful for monitoring the device. • Scheduled Events The Duolinks SW24 Series Load Balancer can be set to automatically reboot once a day at a user specified time. User Guide Syswan Duolinks SW24 Series Page 6 ©...

  • Page 13: Package Contents

    If any of the above items are damaged or missing, please contact your dealer immediately. Product Details Front Panel Syswan Duolinks SW24 Series Load Balancer Front Panels Operation of the Front Panel LEDs is as follows: LINK/ACT ON – Physical connection or data in/out.
  • Page 14 WAN2 LINK/ACT & 10M/100M LEDs solid On. LAN1 LINK/ACT & 10M/100M LEDs solid On. If your discover any of the above error conditions, please contact our support team for assistance. User Guide Syswan Duolinks SW24 Series Condition Firmware Download in progress. MAC address not assigned.
  • Page 15 Connect the primary Broadband Modem here. WAN 1 Default Settings When the Duolinks SW24 Series Load Balancer has finished booting after a factory reset, all configuration settings will be set to factory default, including: • IP Address set to its default value of 192.168.1.1, with a Network Mask of 255.255.255.0 •...
  • Page 16 TFTP Download This setting should be used only if your Duolinks SW24 Series Load Balancer is unstable and if you wish to restore it by downloading a new firmware version. Follow this procedure: 1. Power On your Syswan Duolinks SW24 Series Load Balancer.

  • Page 17: Basic Setup

    The Basic Setup of your Duolinks SW24 Series Load Balancer involves the following steps: 1. Configuring the Duolinks SW24 Series Load Balancer LAN settings to suit your needs. 2. Installing the Duolinks SW24 Series Load Balancer in your LAN and connecting the Broadband Modem or Modems.

  • Page 18: Configuration Procedure

    Configuration Procedure 1. Configuring the Duolinks SW24 Series Load Balancer for your LAN 1. Use a standard LAN cable to connect your PC to any Hub port on the Duolinks SW24 Series Load Balancer. 2. Connect the power adapter and power up the Duolinks SW24 Series Load Balancer. Only use the power adapter provided;...
  • Page 19 PC. • Check the following points : a) The Syswan Duolinks SW24 Series Load Balancer is properly installed. b) LAN connection to your PC is correct. c) The Syswan Duolinks SW24 Series Load Balancer is powered ON. 8. After the login, you will first see the Admin Setup screen, as shown below.
  • Page 20 If you forget your new username and/or the password, you will have to perform a “Reset to Default” by pressing the reset button on the rear panel for more than 3 seconds. The Syswan Support team will not be able to help you find the username and/or the password once they have been changed from the default.
  • Page 21 LAN & DHCP Page LAN IP Configuration This is the IP address of your Duolinks SW24 Series Load Balancer on your network (LAN). The default values shown are suitable for any network. If your existing network configuration uses another IP address range or if the default IP address is already in use by another device, you may change this information to suit your needs.
  • Page 22 • See the following table for details of each setting. 11. Click Submit to save your data, then go to Step 2, Installing the Duolinks SW24 Series Load Balancer on your LAN. Note : If you change LAN IP Settings, the Duolinks SW24 Series Load Balancer will instantly reboot in order to deploy the new LAN configurations.
  • Page 23 Sniffed, the IP address was detected by examining the LAN, rather than allocated by the DHCP Server. In this case, the Name is usually not known. • Time Left – The time left until the DHCP lease expires. User Guide Syswan Duolinks SW24 Series Page 17 © Syswan Technologies, Inc.
  • Page 24 4. Power ON the modems and wait for synchronization (approx. 30 seconds). 5. Plug in the power adapter of the Duolinks SW24 Series Load Balancer to an electrical outlet and insert the power cord into the DC 5V input on the back panel. Immediately the Power LED of your router will light up.
  • Page 25 Syswan Duolinks SW24 Series 3. Configuring the Duolinks SW24 Series Load Balancer for Internet Access Select “Basic Configuration >Primary Setup” from the menu. Make sure you have all the setup instructions provided by your ISP. If not, contact your ISP to obtain all the necessary instructions for accessing the Internet using your Broadband modems before proceeding.
  • Page 26 For any of the following situations, refer to Chapter 3: Advanced Port Setup for further configuration, which may be required. • Multiple IP addresses on either port • Multiple PPPoE sessions User Guide Primary Setup Page Page 20 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.
  • Page 27 ISP in this field. Otherwise, this should be left at the default value. The setup of your Duolinks SW24 Series Load Balancer for dual WAN routing is now complete. The following section details how to configure PCs and other devices on your network to use the Duolinks SW24 Series Load Balancer as the gateway and benefit from the twin WAN installation.

  • Page 28: Configure Pcs On Your Lan

    For all non-Server versions of Windows, the default TCP/IP setting is to act as a DHCP client. In Windows, this is called Obtain an IP address automatically. Just start (or restart) your PC, and it will obtain an IP address from the Duolinks SW24 Series Load Balancer.
  • Page 29 - Ensure your DNS (Name Server) settings are correct. Linux Clients It is only necessary to set the Duolinks SW24 Series router as the «Gateway» for the Linux Client and ensure your Name Server settings are correct. Make sure that you are logged in as «root» before attempting any changes.
  • Page 30 Syswan Duolinks SW24 Series Other Network enabled devices (ie network printer…) Most network enabled devices are configured for DHCP by default. Please consult the user guide or the administrator guide provided with your network enabled device on how to activate and configure TCP/IP networking.

  • Page 31: Advanced Port

    3. Advanced Port Overview Advanced port options permits advanced WAN link related settings and optional connection configuration as required by your ISP and helps fine tune of the twin WAN routing capabilities of your Duolinks SW24 Series Load Balancer. •...
  • Page 32 The default is 1500. Sometimes you may want the MTU to be the same as the smallest MTU of all the networks between this device and a packet's final destination to avoid the packet from being fragmented.The default MTU allows the Duolinks SW24 Series Load Balancer to automatically determine the correct value.
  • Page 33 (e.g. inside/outside WAN and which WAN). Its size can be adjusted if needed. View ARP Tables displays ON/OFF selection of bridge mode on each WAN port. Clear ARP Tables disables bridge mode on all WAN ports. Page 27 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 34: Load Balancing

    IP Addresses: The link with the least number of Host IP addresses built on the WAN port. Loading Share: Enter the desired percent of traffic load for each WAN port. User Guide Load Balancing page Page 28 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.
  • Page 35 Accumulated Statistics – Enable Accumulated statistics for WAN1 & WAN2 for a defined time interval. Current Current loading share table for WAN1 & WAN2. Statistics Overall Overall loading share table for WAN1 & WAN2. statistics User Guide Syswan Duolinks SW24 Series Page 29 © Syswan Technologies, Inc.

  • Page 36: Advanced Pppoe

    Syswan Duolinks SW24 Series Advanced PPPoE PPPoE (Point-to-Point Protocol over Ethernet) is a network protocol which is widely used by DSL service providers today. You may use the Advanced PPPoE settings to open multiple PPPoE sessions on the same WAN port. This feature is provided by some ISPs and allows you to create Multiple PPPoE sessions over the same DSL link and allows you to obtain a different public IP address for each opened session.
  • Page 37 Otherwise, this field should be left at 0.0.0.0. • Assigned Host Name – This field is used by a Host to uniquely associate an access concentrator to a particular Host request. User Guide Syswan Duolinks SW24 Series Page 31 © Syswan Technologies, Inc.
  • Page 38 PPPoE server until a response is received. It is recommended to leave this setting at its default value. Connection Status This displays the current connection status for each session. User Guide Syswan Duolinks SW24 Series Page 32 © Syswan Technologies, Inc.

  • Page 39: Advanced Pptp

    Syswan Duolinks SW24 Series Advanced PPTP The PPTP (Point-to-Point Tunneling Protocol) is used to implement a virtual private network (VPN) between a DSL subscriber and a DSL service provider when opening an Internet connection. These setttings are needed only if required by your ISP and if you have checked the PPTP check box with Static or Dynamic IP as your connection method on the Primary Setup page.
  • Page 40 PPTP server until a response is received. It is recommended to leave this setting at its default value. Connection Status This displays the current connection status for PPTP User Guide Syswan Duolinks SW24 Series Page 34 © Syswan Technologies, Inc.

  • Page 41: Advanced Configuration

    Advanced configuration section allows you to configure various NAT 1:1 related settings and other advanced features (ie : Dynamic DNS, Multi DMZ, UpnP..) of your Duolinks SW24 Series Load Balancer. Network Address Translation (NAT, which is also known as Native Address Translation, IP Masquerading or Network Masquerading) is a technique used to translate network traffic passing through a router by rewriting the source and destination IP addresses of IP packets.
  • Page 42 Syswan Duolinks SW24 Series Host IP Setup Page This section defines hosts on your LAN and you can assign them to groups. These group can be applied to Access Filter and Block URL features. You can also bind multiple PPPoE link sessions to individual hosts on the LAN.
  • Page 43 Port and Session. Otherwise, ignore these settings. Note: Multiple PPPoE sessions are defined on the Advanced PPPoE screen. Host & Group This table shows the current bindings. List User Guide Syswan Duolinks SW24 Series Page 37 © Syswan Technologies, Inc.

  • Page 44: Routing

    If your LAN has other gateways and routers, you must configure the Static Routing screen as described below. You also need to configure the other Routers. Please refer to the Advanced LAN Configuration section of this user guide for more details. User Guide Syswan Duolinks SW24 Series Routing Page Page 38 © Syswan Technologies, Inc.

  • Page 45: Virtual Servers

    Connecting to the Virtual Servers Once configured, anyone on the Internet can connect to your defined Virtual Servers. They must use the Duolinks SW24 Series Load Balancer's Internet IP Address (the IP Address allocated by your ISP) to access the Virtual Servers.
  • Page 46 3. Enter 192.168.1.100 in IP address box and click Update New servers can be added to the list using the same procedure and by clicking the Add button. User Guide Virtual Server Page Page 40 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.
  • Page 47 Allowed Remote IP – The range of IP addresses that are allowed to access the virtual server. Virtual Server The Virtual Server List shows details of all Virtual Servers which have been defined. List User Guide Syswan Duolinks SW24 Series Page 41 © Syswan Technologies, Inc.

  • Page 48: Special Applications

    If you use Internet applications which have non-standard connections or port numbers, you may find that they do not operate correctly because they are blocked by the firewall of the Duolinks SW24 Series Load Balancer. To overcome this problem, you can define the application as a "Special Application" to make it to work.
  • Page 49 Note: Adding a PC to the DMZ feature requires that basic security requirements are met on that PC as DMZ devices are totally exposed to the Internet and are not protected by your Duolinks SW24 Series Load Balancer’s firewall.

  • Page 50: Dynamic Dns

    2. Follow the service provider's procedure to have a Domain Name (Host name) allocated to you. 3. Configure the Dynamic DNS screen, as described below. 4. The Duolinks SW24 Series Load Balancer will then automatically update your IP Address recorded by the Dynamic DNS service provider.
  • Page 51 Select the WAN port on which the Dynamic DNS is used. The "Force Update" button will Binding update your record on the Dynamic DNS Server immediately. User Guide Dynamic DNS Page Page 45 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.
  • Page 52 The Dynamic DNS implemetation on the Duolinks SW24 Series Load Balancer permits a dynamic host name for the device and does not provide individual dynamic host names for each WAN port configuration. The Duolinks SW24 Series Load Balancers update Dynamic DNS information on the specified WAN port. In...

  • Page 53: Multi Dmz

    "DMZ PC" and other Internet users or Servers. Important Note: The "DMZ PC" resides outside the Duolinks SW24 Series Load Balancer’s SPI Firewall, thus making it more vulnerable to Internet attacks. For this reason, you should only enable the DMZ feature when required and secure the DMZ PC locally (ie OS level port restrictions, local firewall...).

  • Page 54: Upnp

    With UPnP you can easily setup and configure an entire network, enable discovery and control of networked devices and services. When UPnP is enabled, you will see your Duolinks SW24 Series Load Balancer as an icon is the Network Neighbourhood when using Windows OS on your PC.

  • Page 55: Nat

    (LAN) to share an Internet (WAN) access. Sometimes the TCP/UDP port numbers of IP packets are also translated as they pass through (PAT - Port Address Translation). NAT is the technology which allows one or more WAN (Internet) IP addresses of your Duolinks SW24 Series Load Balancer to be transparently used by all LAN users.
  • Page 56 Configuration checkbox. If you disable NAT routing, this device will act as a Bridge or Static Router. Most features, including Load Balance, will be unavailable. If some packets have port numbers which cannot be translated for special applications, you must input value in port range for Disable Port Translation.

  • Page 57: Arp Status

    ARP is used to convert addresses from a layer 3 protocol such as Internet Protocol (IP) to a layer 2 MAC address. On broadcast networks like the Ethernet, the MAC address allows each host to be uniquely identified. Example, the MAC address of a Duolinks SW24 Series Load Balancer : 00-1C-74-00-00-01 Typical ARP usage :...
  • Page 58 Arp Entry Add / Specify IP and MAC address to add or update a record. Update • Arp Query Check Input LAN or WAN IP address to query ARP. User Guide Syswan Duolinks SW24 Series Page 52 © Syswan Technologies, Inc.

  • Page 59: Advanced Features

    Protocol & Port Binding : It is similar to SMTP binding but you must setup additional data such as Protocol & Port Range. If all the checked settings are met then the specific packet will be bound on the specified WAN port. User Guide Advanced Features Page Page 53 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.
  • Page 60 Strict Binding – If check box is enabled, that mean once the port binding is disconnected, it will not switch to the WAN port that are still alive. User Guide Syswan Duolinks SW24 Series Page 54 © Syswan Technologies, Inc.
  • Page 61 Balancing is not permitted or will be seen as a session hijack (ie: secure banking via non standard SSL port…). The device is set to automatically maintain Session Persistency for SSL connections (https) made via the default TCP Port 443. User Guide Syswan Duolinks SW24 Series Page 55 © Syswan Technologies, Inc.

  • Page 62: Security Management

    A DNS lookup determines the IP address of the requested site and the site's IP address is checked against specified IP address entries. Depending on the results and the URL filter settings, access is either granted or denied. User Guide Syswan Duolinks SW24 Series URL Filter Page Page 56 © Syswan Technologies, Inc.
  • Page 63 Access Item This text field is to enable/disable the URL Filter function, and input URL keyword phrase. Internet Access List of current input items. List User Guide Syswan Duolinks SW24 Series Page 57 © Syswan Technologies, Inc.

  • Page 64: Access Filter

    Five user groups are available and each group can have different access rights. • By default all PCs (users) are in the Default group unless specifically assigned to another group on the Host IP screen. User Guide Access Filter Page Page 58 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.
  • Page 65 Port No. Range – The port number range to be blocked. (For TCP and UDP only) If only one port number is used, enter the same port number in both fields. Page 59 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 66: Session Limit

    Pause Time for Host while exceeding limits on dropped new sessions – Within the Pause Time, no new session of the suspended host will be served by the system. (default: 5 min., maximum: 65535 min.) Page 60 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 67: Sysfilter Exception

    SysFilter Exception The Duolinks SW24 Series Load Balancer’s built-in SPI firewall will automatically reject any unrecognized packets. If you want the device to accept any specific packets, you should build the corresponding exception rules using the System Filter Exceptions. You will not need to modify the default settings or add anything here except if you are running a specific application which needs the default SPI firewall and security settings modified on the load balancer.

  • Page 68: Vpn Configuration

    Before building your VPN infrastructure, you must identify and plan your VPN requirements : 1. Is it a Remote-to-LAN or a LAN-to-LAN VPN ? Do both end points have Duolinks SW24 VPN Series Load Balancers or the Syswan VPN Client ? 2.

  • Page 69: Ipsec (Ike) Global Setting

    IPSec (IKE) Global Setting IKE Global Setup Page To configure IPSec VPN on your Duolinks SW24 VPN Series Load Balancer, first enable both WAN links (WAN1 and WAN2) on the IKE Global Setup page. You may leave the default configuration which is suitable for most common situations.
  • Page 70 IKE negotiation. The maximum time default is 10 sec. Maxtime to complete phase 2 – Really establish the IPSec SAs. By default the maximum time is 300 sec. Page 64 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 71: Ipsec Policy Setup

    Syswan Duolinks SW24 Series IPSec Policy Setup Use the IPSec Policy Setup page to create new VPN tunnels (phase 2 policies) or to modify existing VPN tunnels. You will need to specify all network related information and security related information including encryption and authentication methods.
  • Page 72 VPN Fail over A redundant VPN Failover configuration is achieved by creating two (2) identical VPN tunnels between two Duolinks SW24 VPN Series Load Balancers and by pointing each WAN link to the corresponding WAN link on the remote device.
  • Page 73 By default the protocol type is “Any”. Local Security Network – These entries identify the private network on this VPN router, the hosts of which can use the LAN-to-LAN connection. You can choose a single IP address, the subnet, or a selected IP range to make VPN LAN-to-LAN connection.
  • Page 74 Key Lifetime- This is specified the lifetime of the IKE generated Key. If the time expires or data is passed over this volume, a new key will be renegotiated, By default, 0 is for no limit. Page 68 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.
  • Page 75 Action – Executed action after DPD failure. There are Failover, Remove Tunnel and Keep Tunnel Alive options available for this action. • Logging – enable logging will display log on VPN log view list. User Guide IPSec Policy Options Page Page 69 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.
  • Page 76 MUST copy it. Set DF Flag – If this DF (Do not Fragment) flag is set, it means the fragmentation of this packet at the IP level is not permitted. Page 70 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 77: Vpn Mesh Group Configuration

    Syswan Duolinks SW24 Series VPN Mesh Group Configuration This section only applies to the Duolinks SW24 VPN Plus Load Balancer. The following section will help guide you on how to configure VPN load balancing through the mesh group setup. 1. On the mesh group configuration page, click Create to display a configuration page similar to the “VPN policy”...
  • Page 78 VPN performance during a link failure. All other settings in the Set Options.. page should be left at their defaults for optimum VPN Mesh Group functionality. User Guide Mesh Group Setup Page Page 72 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 79: Qos Configuration

    The Duolinks SW24 Series Load Balancer provides QoS based on the Type of Service (ToS) header or by using user defined QoS policies.

  • Page 80: Qos Policy Configuration

    IP, MAC, port and protocol type. This feature is useful when the WAN link is very busy or congested or when using special applications that need real time services such as Internet phone, video conferencing... etc. User Guide QoS Policy Configuration Page Page 74 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.
  • Page 81 Priority Queue – This device supports four queues. When a packet meets a policy rule requirement, it will be put into the responding queue. Otherwise, it is assigned the lowest priority to pass through. User Guide Syswan Duolinks SW24 Series Page 75 © Syswan Technologies, Inc.

  • Page 82: Dns Configuration

    Name server 2 : Public IP Address of your WAN 2 After this registrar level update, your registrar will redirect to your Duolinks SW24 VPN Plus Load Balancer all DNS requests for your domain (e.g.A, NS, CNAME, MX). You will need to set the SOA resource records and configure DNS &...

  • Page 83: Configure Dns

    In order to make inbound load balancing work, you have to accommodate for servers on the LAN side of your Duolinks SW24 VPN Plus Load Balancer. It is also necessary for you to own or newly register at least one domain name.
  • Page 84 Location/IP Address – Select Private and enter IP Address with its private address if the mail server is inside your LAN. Otherwise select Public and enter its public IP Address. Page 78 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 85: Map Host Url

    Syswan Duolinks SW24 Series Map Host URL After the setup of your DNS configuration, it is necessary to specify host URLs to map to the LAN IP addresses on your network. A FQDN (Fully Qualified Domain Name) is the combination of the host URL and the domain name (ie: www.mydomain.com).
  • Page 86 By default, it will use your current WAN port IP address for incoming load balance • Canonical Name – Alias for host URLs. CNAME Record User Guide Syswan Duolinks SW24 Series Page 80 © Syswan Technologies, Inc.

  • Page 87: Management Assistant

    • Upgrade Firmware Admin Setup This page is intended for various administrator related settings. Please see “Admin Setup” section in Chapter 2 for more details. User Guide Admin Setup Page Page 81 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 88: Email Alert

    Syswan Duolinks SW24 Series Email Alert This feature will send a warning email, informing the System Administrator that one of the WAN ports has been disconnected. Email Alert – You can choose to enable or disable the sending of a warning email.
  • Page 89 If the email server is on LAN site, and the SMTP server is using domain name instead of IP address, then you should enable “DNS loop-back” for that FQDN in the Advanced Setup > Advanced Features page. User Guide Syswan Duolinks SW24 Series Page 83 © Syswan Technologies, Inc.

  • Page 90: Snmp

    This section is only useful if you have installed a SNMP (Simple Network Management Protocol) software on your PC. If so, you may use a standard MIB II file with your Duolinks SW24 Series Load Balancer to monitor network and device activity.

  • Page 91: Syslog

    A syslog client usually sends a syslog message to the syslog server using UDP or TCP protocol. The Duolinks SW24 Series Load Balancer can internally store the last 100 Syslog messages and/or send them on the fly to the specified Syslog Server for real time system information updates.
  • Page 92 Emergency to Debug. The lower level it is, the more messages it will generate. Emergency is the highest priority level, and Debug is the lowest. Setting priority to Debug will send all generated messages. Page 86 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 93: Diagnostic Tools

    Syswan Duolinks SW24 Series Diagnostic Tools This page provides tools for troubleshooting the network connectivity, DNS name resolving and Arp lookup problem. IP Tools ICMP Method : Test network connectivity by issuing ICMP Echo Request (Ping) packets to the specified destination (Name/IP).

  • Page 94: Upgrade Firmware

    Damage resulting in resetting your load balancer during a firmware or configuration update is NOT covered by the standard 2 year warranty. User Guide Firmware Upgrade Page Page 88 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 95: Advanced Lan Configuration

    If your LAN already has a DHCP Server, and you wish to continue using it, the following configuration is required. • The DHCP Server function in the Duolinks SW24 Series Load Balancer must be disabled. This setting is on the LAN & DHCP screen. •...
  • Page 96 LAN, WAN1, WAN2 – If enabled, any WAN or LAN can execute RIP function. Static Routing If there is more than one router on a network, this Routing table must be configured because the router needs to know what packet goes to which router. A routing table entry is required for each LAN segment on the network.

  • Page 97: Configuring Other Routers On Your Lan

    Configuring other routers on your LAN All traffic for devices not on the local LAN must be forwarded to the Duolinks SW24 Series Load Balancer, so that they can be forwarded to the Internet. This is done by configuring other routers to use the Duolinks SW24 Series Load Balancer as the Default Route or Default Gateway, as illustrated by the example below.
  • Page 98 Destination IP Address Network Mask Gateway IP Address Metric For Router B's Default Route Destination IP Address Network Mask Gateway IP Address Interface Metric User Guide Syswan Duolinks SW24 Series 0.0.0.0 0.0.0.0 192.168.1.1 0.0.0.0 0.0.0.0 192.168.2.80 Page 92 © Syswan Technologies, Inc.

  • Page 99: Operation And Status

    11. Operation and Status Operation Once the Duolinks SW24 Series Load Balancer and the LAN PCs are configured, networking operations are handled automatically within your network and the configured WAN ports. However, there are some situations where additional Internet configuration may be required: Refer to Chapter 4 - Advanced Features for further details.
  • Page 100 This will extend the period for which the current WAN IP address is allocated to you. • IP Address – The IP address of the Duolinks SW24 Series Load Balancer, as seen from the Internet. This IP Address is allocated by the ISP (Internet Service Provider).

  • Page 101: Restore Factory Defaults

    The DCHP server function will be enabled. These changes may mean that your current connection to the GUI is invalid, and you will have to re-connect to the Duolinks SW24 Series Load Balancer using its default IP address (https://192.168.1.1). User Guide...

  • Page 102: Wan Status

    The statistics for WAN1 & WAN2 packets with a period of time. User can define the time Statistics period through load balancing web page setup. Overall loading share (receive & transmit) packets for WAN1 and WAN2. Overall statistics User Guide WAN Status Page Page 96 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.

  • Page 103: Nat Status

    Syswan Duolinks SW24 Series NAT Status This screen is displayed when you click the "Check NAT Detail" button on the WAN Status screen. NAT Status Page Page 97 User Guide © Syswan Technologies, Inc.
  • Page 104 Interface – LAN and WAN interface of the Duolinks SW24 Series Load Balancer. • IP Address – The WAN (Internet) & LAN IP Address of the Duolinks SW24 Series Load Balancer. • Subnet Mask – The Network Mask (Subnet Mask) for the IP Address above.

  • Page 105: Appendix A Specifications

    Appendix A Specifications Models Duolinks SW24 Load Balancer Duolinks SW24 VPN Load Balancer Duolinks SW24 VPN Plus Load Balancer Dimensions 245mm (W) x 137mm (D) x 30mm (H) Operating 0° C to 40° C Temperature Storage -10° C to 70° C...

  • Page 106: Appendix B Windows Tcp/Ip Setup

    95/98/ME/2000 TCP/IP settings, no changes need to be made. • By default, the Duolinks SW24 Series Load Balancer will act as a DHCP Server, automatically providing a suitable IP Address (and related information) to each PC when the PC boots.

  • Page 107: Using Dhcp

    To use DHCP, select the radio button Obtain an IP Address automatically. This is the default Windows settings. Restart your PC to ensure it obtains an IP Address from the Duolinks SW24 Series Load Balancer. Using "Specify an IP Address"...
  • Page 108 2. Right click the Local Area Connection icon and select Properties. You should see a screen like the following: User Guide Figure B-3: Gateway Tab (Win 95/98) Figure B-4: DNS Tab (Win 95/98) Page 102 Syswan Duolinks SW24 Series © Syswan Technologies, Inc.
  • Page 109 Syswan Duolinks SW24 Series Figure B-5: Network Configuration (Win 2000) 3. Select the TCP/IP protocol for your network card. 4. Click on the Properties button. You should then see a screen like the following. Page 103 User Guide © Syswan Technologies, Inc.
  • Page 110 To use DHCP, select the radio button Obtain an IP Address automatically. This is the default Windows settings. Restart your PC to ensure it obtains an IP Address from the Duolinks SW24 Series Load Balancer. Using a fixed IP Address ("Use the following IP Address") If your PC is already configured, check with your Network Administrator before making the following changes: •...
  • Page 111 Syswan Duolinks SW24 Series Checking TCP/IP Settings - Windows XP: 1. Select Control Panel - Network Connection. 2. Right click the Local Area Connection and choose Properties. You should see a screen like the following: Figure B-7: Network Configuration (Windows XP) 3.
  • Page 112 To use DHCP, select the radio button obtain an IP Address automatically. This is the default Windows settings. Restart your PC to ensure it obtains an IP Address from the Duolinks SW24 Series Load Balancer. Using a fixed IP Address ("Use the following IP Address") If your PC is already configured, check with your Network Administrator before making the following changes.

  • Page 113: Appendix C Troubleshooting

    This chapter covers some common problems that may be encountered while using the Duolinks SW24 Series Load Balancer and some possible solutions to them. If you follow the suggested steps and the Duolinks SW24 Series Load Balancer still does not function properly, contact our support team or your dealer for further assistance.
  • Page 114 Some applications do not run properly when using the Duolinks SW24 Series Load Problem 2: Balancer. Solution 2: The Duolinks SW24 Series Load Balancer processes the data passing through it, so it is not transparent. Use the Special Applications feature to allow the use of Internet applications which do not function correctly.

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