D-Link DFL-80 User Manual
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D-Link DFL-80 User Manual

D-Link DFL-80 User Manual

Ethernet vpn firewall
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D-Link DFL-80
Ethernet VPN Firewall
Manual
Building Networks for People

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Summary of Contents for D-Link DFL-80

  • Page 1 D-Link DFL-80 Ethernet VPN Firewall Manual Building Networks for People...

  • Page 2: Table Of Contents

    Contents Package Contents ................3 Introduction.................... 4 Software Management ................6 Troubleshooting .................134 Technical Specifications ..............142 Contacting Technical Support ............144 Warranty and Registration ..............145...

  • Page 3: Package Contents

    AC power adapter (5V, 3A) Note: Using a power supply with a different voltage rating than the one included with the DFL-80 will cause damage and void the warranty for this product. If any of the above items are missing, please contact your reseller.

  • Page 4: Introduction

    E-mail alerts to the Administrator automatically for immediate intruder’s invasion crisis management. DFL-80 supporting protocols The DFL-80 supports all the TCP, UDP and ICMP protocols, such as HTTP, TELNET, SMTP, POP3, FTP, DNS, PING, etc. System Administrators can set up proprietary protocols according to operating requirements.

  • Page 5: Hardware Description

    Internal Ports (LAN): Use this port to connect to the internal network of the office. Reset: Reset the DFL-80 to the original default settings. DC Power: connect one end of the power supply to this port, the other end to the electrical wall outlet.

  • Page 6: Software Management

    Software Management DFL-80 management tool: Web User Interface The main menu functions are located on the left-hand side of the screen, and the display window will be on the right-hand side. The main functions include 12 items, which are: Administrator, Configuration, Address, Service, Schedule,...
  • Page 7 Connect the Administrator’s PC to the Internal (LAN) port of the DFL-80 Firewall. Make sure there is a link light for the connection. The DFL-80 has an embedded web server used for management and configuration. Use a web browser to display the configurations of the firewall (such as Internet Explorer 6(or above) or Netscape 6(or above) with full java script support).
  • Page 8 Setting: The Administrator may use this function to backup firewall configurations and export (save) them to an “Administrator” computer or anywhere on the network; or restore a configuration file to the DFL-80; or restore the firewall back to default factory settings. Under Setting, the Administrator may enable e-mail alert notification.
  • Page 9 Administration (continued) Firewall Administration setup On the left hand menu, click on Administration, and then select Admin below it. The current list of Administrator(s) shows up. Settings of the Administration table: Administrator Name: The username of Administrators for the firewall. The user admin cannot be removed.
  • Page 10 Administration (continued) Adding a new Sub Administrator: Step 1. In the Administration window, click the New Sub Admin button to create a new Sub Administrator. Step 2. In the Add New Sub Administrator window: ! Sub Admin Name: Enter the username of new Sub Admin. ! Password: Enter a password for the new Sub Admin.
  • Page 11 Administration (continued) Changing the Sub-Administrator’s Password: Step 1. In the Administration window, locate the Administrator name you want to edit, and click on Modify in the Configure field. Step 2. The Modify Administrator Password window will appear. Enter in the required information: Password: enter original password.
  • Page 12 Settings The Administrator may use this function to backup firewall configurations and export (save) them to an “Administrator” computer or anywhere on the network; or restore a configuration file to the device; or restore the firewall back to default factory settings. Entering the Settings window: Click Setting in the Administrator menu to enter the Settings window.
  • Page 13 Exporting DFL-80 Firewall settings: Step 1. Under Firewall Configuration, click on the Download button next to Export System Settings to Client. Step 2. When the File Download pop-up window appears, choose the destination place in which to save the exported file. The Administrator may choose to rename the file if preferred.
  • Page 14 Restoring Factory Default Settings: Step 1. Select Reset Factory Settings under Firewall Configuration. Step 2. Click OK at the bottom-right of the screen to restore the factory settings. Enabling E-mail Alert Notification: Step 1. Select Enable E-mail Alert Notification under E-Mail Settings. This function will enable the Firewall to send e-mail alerts to the System Administrator when the network is being attacked by intruders or when emergency conditions occur.
  • Page 15 To-Firewall Packets Log Once this function is enabled, every packet passing through the Firewall will be recorded for the administrator to trace. Firewall Reboot Once this function is enabled, the firewall will be reboot. Step 1. Click Setting in the Administration menu to enter the settings window.
  • Page 16 Date/Time Admins can configure the Firewall’s date and time by either syncing to an Internet Network Time Server (NTP) or by syncing to your computer’s clock. Follow these steps to sync to an Internet Time Server. Step 1. Enable synchronization by checking the box.

  • Page 17: Software Update

    Software Update Under Software Update, the admin may update the DFL-80’s software with a newer software. The admin can visit http://support.dlink.com to get an available updated software. Configuration System Configuration In this section, the Administrator can: (1) Set up the internal, external and DMZ IP addresses...
  • Page 18 The Internal network will use a private IP scheme. The private IP network will not be routable on the Internet. IP Address: The private IP address of the Firewall’s internal network is the IP address of the Internal (LAN) ports of the DFL-80. The default IP address is 192.168.1.1.
  • Page 19 DFL-80 is 255.255.255.0. Ping: Select this to allow the internal network to ping the IP Address of the Firewall. If set to enable, the DFL-80 will respond to ping packets from the internal network. For PPPoE (ADSL User): This option is for PPPoE users who are required to enter a username and password in order to connect, such as ADSL users.
  • Page 20 IP Address assigned to you. IP Address: Enter the static IP address assigned to you by your ISP. This will be the public IP address of the WAN port of the DFL-80. Netmask: This will be the Netmask of the WAN network. (i.e.
  • Page 21 WebUI: Select this to allow the DFL-80 WEBUI to be accessed from the External (WAN) network. This will allow the WebUI to be configured from a user on the Internet. Keep in mind that the DFL-80 always requires a username and password to enter the WebUI.

  • Page 22: Multiple Nat

    Multiple NAT Multiple NAT allows the local port to set multiple subnetworks and connect with the internet through different external IP Addresses. For instance: the lease line of a company applies several real IP Addresses 168.85.88.0/24, and the company is divided into the R&D department, the service and sales department, the procurement department, and the accounting department.
  • Page 23 Multiple NAT settings Click Multiple NAT in the Configuration menu to enter Multiple NAT window. Multiple NAT Global port interface IP Address: Global port IP Address. Local port interface IP Address: Local port IP Address and Subnet Mask. Modify: Modify the settings of Multiple NAT. Click Modify to modify the parameters of Multiple NAT or click Delete to delete settings.
  • Page 24 Add Multiple NAT Step 1. Click Multiple NAT in the Configuration menu to enter Multiple NAT window. Step 2. Click the Add button below to add Multiple NAT. Step 3. Enter the IP Address in the appropriate column of the new window. External Interface IP: WAN IP address to be used for the Multiple NAT session.
  • Page 25 Modify Multiple NAT Step 1. Click Multiple NAT in the Configuration menu to enter Multiple NAT window. Step 2. Find the IP Address you want to modify and click Modify Step 3. Enter the new IP Address in Modify Multiple NAT window. Step 4.
  • Page 26 Hacker Alert The Administrator can enable the DFL-80’s intruder alert functions in this section. When abnormal conditions occur, the Firewall will send an e-mail alert to notify the Administrator, and also display warning messages in the Event window of Alarm.
  • Page 27 Detect UDP Flood: Select this option to detect UDP flood attacks. A UDP flood attack is similar to an ICMP flood attack. After enabling this function, the System Administrator can enter the number of UDP packets per second that is allow to enter the network/firewall. Once the UDP packets exceed this limit, the activity will be logged in Alarm and an email alert is sent to the Administrator.

  • Page 28: Route Table

    Route Table In this section, the Administrator can add static routes for the networks. Entering the Route Table screen: Click Configuration on the left side menu bar, then click Route Table below it. The Route Table window appears, in which current route settings are shown.
  • Page 29 Adding a new Static Route: Step 1. In the Route Table window, click the New Entry button. Step 2. In the Add New Static Route window, enter new static route information. Step 3. In the Interface pull-down menu, select the network to connect (Internal, External or DMZ).
  • Page 30 Modifying a Static Route: Step 1. In the Route Table menu, find the route to edit and click the corresponding Modify option in the Configure field. Step 2. In the Modify Static Route window, modify the necessary routing addresses. Step 3. Click OK to apply changes or click Cancel to cancel it.
  • Page 31 DHCP In the section, the Administrator can configure DHCP (Dynamic Host Configuration Protocol) settings for the Internal (LAN) network. Entering the DHCP window: Step 1. Click Configuration on the left hand side menu bar, then click DHCP below it. The DHCP window appears in which current DHCP settings are shown on the screen.
  • Page 32 Internal network computers will use the DFL-80 as a DNS server, which acts as the DNS Proxy. If you want to use the DNS Proxy function of the DFL-80, the end user’s main DNS server IP address should be the same LAN IP Address as the...
  • Page 33 Entering the DNS Proxy window: Click on Configuration in the menu bar, then click on DNS Proxy below it. The DNS Proxy window will appear. Below is the information needed for setting up the DNS Proxy: Domain Name: The domain name of the server Virtual IP Address: The virtual IP address respective to DNS Proxy Configure: Modify or remove each DNS Proxy policy Adding a new DNS Proxy:...
  • Page 34 Modifying a DNS Proxy: Step 1: In the DNS Proxy window, find the policy to be modified and click the corresponding Modify option in the Configure field. Step 2: Make the necessary changes needed. Step 3: Click OK to save changes or click on Cancel to cancel modifications.

  • Page 35: Dynamic Dns

    Dynamic DNS The Dynamic DNS (require Dynamic DNS Service) allows you to alias a dynamic IP address to a static hostname, allowing your device to be more easily accessed by specific name. When this function is enabled, the IP address in Dynamic DNS Server will be automatically updated with the new IP address provided by ISP.
  • Page 36 Add Dynamic DNS settings Step 1: Click Dynamic DNS in the Configuration menu to enter Dynamic DNS window. Step 2: Click Add button. Step 3: Click the information in the column of the new window. Service providers Select service providers. Register to the service providers’...
  • Page 37 Modify Dynamic DNS Step 1: Click Dynamic DNS in the Configuration menu to enter Dynamic DNS window. Step 2: Find the item you want to change and click Modify. Step 3: Enter the new information in the Modify Dynamic DNS window. Step 4: Click OK to change the settings or click Cancel to discard changes.
  • Page 38 Address The DFL-80 Firewall allows the Administrator to set Interface addresses of the Internal network, Internal network group, External network, External network group, DMZ and DMZ group. What is the Address Table? An IP address in the Address Table can be an address of a computer or a sub network.
  • Page 39 Adding a new Internal Address: Step 1. In the Internal window, click the New Entry button. Step 2. In the Add New Address window, enter the settings of a new internal network address. Step 3. Click OK to add the specified internal network or click Cancel to cancel the changes.
  • Page 40 Removing an Internal Address: Step 1. In the Internal window, locate the name of the network to be removed. Click the Remove option in its corresponding Configure field. Step 2. In the Remove confirmation pop-up box, click OK to remove the address or click Cancel to discard changes.
  • Page 41 Adding an Internal Group: Step 1. In the Internal Group window, click the New Entry button to enter the Add New Address Group window. Step 2. In the Add New Address Group window: Available Address: list the names of all the members of the internal network.
  • Page 42 Modifying an Internal Group: Step 1. In the Internal Group window, locate the network group desired to be modified and click its corresponding Modify option in the Configure field. Step 2. A window displaying the information of the selected group appears: Available Address: list names of all members of the Internal network.
  • Page 43 Removing an Internal Group: Step 1. In the Internal Group window, locate the group to be removed and click its corresponding Remove option in the Configure field. Step 2. In the Remove confirmation pop-up box, click OK to remove the group or click Cancel to discard changes.
  • Page 44 Adding a new External Address: Step 1. In the External window, click the New Entry button. Step 2. In the Add New Address window, enter the settings for a new external network address. Step 3. Click OK to add the specified external network or click Cancel to discard changes.
  • Page 45 External Group Entering the External Group window: Click the External Group under the Address menu bar to enter the External window. The current settings for the external network group(s) will appear on the screen.
  • Page 46 Adding an External Group: Step 1. In the External Group window, click the New Entry button and the Add New Address Group window will appear. Step 2. In the Add New Address Group window the following fields will appear: ! Name: enter the name of the new group. ! Available Address: List the names of all the members of the external network.
  • Page 47 Editing an External Group: Step 1. In the External Group window, locate the network group to be modified and click its corresponding Modify button in the Configure field. Step 2. A window displaying the information of the selected group appears: n Available Address: list the names of all the members of the external network.
  • Page 48 Removing an External Group: Step 1. In the External Group window, locate the group to be removed and click its corresponding Modify option in the Configure field. Step 2. In the Remove confirmation pop-up box, click OK to remove the group or click Cancel to discard changes. Entering the DMZ window: Click DMZ under the Address menu to enter the DMZ window.
  • Page 49 Adding a new DMZ Address: Step 1. In the DMZ window, click the New Entry button. Step 2. In the Add New Address window, enter the settings for a new DMZ address. Step 3. Click OK to add the specified DMZ or click Cancel to discard changes.

  • Page 50: Dmz Group

    Removing a DMZ Address: Step 1. In the DMZ window, locate the name of the network to be removed and click the Remove option in its corresponding Configure field. Step 2. In the Remove confirmation pop-up box, click OK to remove the address or click Cancel to discard changes.
  • Page 51 Adding a DMZ Group: Step 1. In the DMZ Group window, click the New Entry button. Step 2. In the Add New Address Group window: ! Available Address: List names of all members of the DMZ. ! Selected Address: list names to assign to a new group. Step 3.
  • Page 52 Modifying a DMZ Group: Step 1. In the DMZ Group window, locate the DMZ group to be modified and click its corresponding Modify button in the Configure field. Step 2. A window displaying information about the selected group appears: Available Address: list the names of all the members of the DMZ.
  • Page 53 Removing a DMZ Group: Step 1. In the DMZ Group window, locate the group to be removed and click its corresponding Remove option in the Configure field. Step 2. In the Remove confirmation pop-up box, click OK to remove the group.
  • Page 54 TCP and UDP protocols support varieties of services, and each service consists of a TCP Port or UDP port number, such as TELNET(23), SMTP(25), POP3(110),etc. The DFL-80 Firewall defines two services: pre-defined service and custom service. The common-use services like TCP and UDP are defined in the pre-defined service and cannot be modified or removed.
  • Page 55 Pre-defined Entering the Pre-defined window: Click Service on the menu bar on the left side of the window. Click Pre- defined under it. A window will appear with a list of services and their associated Port numbers. Note: This list cannot be modified. Custom Entering the Custom window: Click Service on the menu bar on the left side of the window.
  • Page 56 Adding a new Service: Step 1: In the Custom window, click the New Entry button and a new service table appears. Step 2: In the new service table: ! Service Name: This will be the name referencing the new service. ! Protocol: Enter the network protocol type to be used, such as TCP, UDP, or Other (please enter the number for the protocol type).
  • Page 57 Modifying Custom Services: Step 1. In the Custom table, locate the name of the service to be modified. Click its corresponding Modify option in the Configure field. Step 2. A table showing the current settings of the selected service appears on the screen Step 3.
  • Page 58 Group Accessing the Group window: Click Service in the menu bar on the left hand side of the window. Click Group under it. A window will appear with a table displaying current service group settings set by the Administrator.
  • Page 59 Adding Service Groups: Step 1. In the Group window, click the New Entry button. In the Add Service Group window, the following fields will appear: ! Available Services: List all the available services. ! Selected Services: List services to be assigned to the new group.
  • Page 60 Modifying Service Groups Step 1. In the Group window, locate the service group to be edited. Click its corresponding Modify option in the Configure field. Step 2. In the Mod (modify) group window the following fields are displayed: ! Available Services: Lists all the available services. ! Selected Services: List services that have been assigned to the selected group.
  • Page 61 Removing Service Groups: Step 1. In the Group window, locate the service group to be removed and click its corresponding Remove option in the Configure field. Step 2. In the Remove confirmation pop-up box, click OK to remove the selected service group or click Cancel to cancel removing.
  • Page 62 Schedule The DFL-80 Office Firewall allows the Administrator to configure a schedule for policies to take affect. By creating a schedule, the Administrator is allowing the Firewall policies to be used at those designated times only. Any activities outside of the scheduled time slot will not follow the Firewall policies therefore will likely not be permitted to pass through the Firewall.
  • Page 63 Adding a new Schedule: Step 1: Click on the New Entry button and the Add New Schedule window will appear. Step 2: Schedule Name: Fill in a name for the new schedule. Period 1: Configure the start and stop time for the days of the week that the schedule will be active.
  • Page 64 Removing a Schedule: Step 1: In the Schedule window, find the policy to be removed and click the corresponding Remove option in the Configure field. Step 2: A confirmation pop-up box will appear, click on OK to remove the schedule.
  • Page 65 Firewall. What is Policy? The DFL-80 uses policies to filter packets. The policy settings are: source address, destination address, services, permission, packet log, packet statistics, and flow alarm. Based on its source addresses, a packet can be categorized into: (1).
  • Page 66 Outgoing This section describes steps to create policies for packets and services from the Internal (LAN) network to the External (WAN) network. Entering the Outgoing window: Click Policy on the left hand side menu bar, then click Outgoing under it. A window will appear with a table displaying currently defined Outgoing policies.
  • Page 67 Adding a new Outgoing Policy: Step 1: Click on the New Entry button and the Add New Policy window will appear. Step 2: Source Address: Select the name of the Internal (LAN) network from the drop down list. The drop down list contains the names of all internal networks defined in the Internal section of the Address menu.
  • Page 68 Modifying an Outgoing policy: Step 1: In the Outgoing policy section, locate the name of the policy desired to be modified and click its corresponding Modify option under the Configure field. Step 2: In the Modify Policy window, fill in new settings. Note: To change or add selections in the drop-down list for source or destination address, go to the section where the selections are...
  • Page 69 Cancel to cancel removing. Enabled Monitoring function: Log: If Logging is enabled in the outgoing policy, the DFL-80 will log the traffic and event passing through the Firewall. The Administrator can click Log on the left menu bar to get the flow and event logs of the specified policy.
  • Page 70 Alarm: If Logging is enabled in the outgoing policy, the DFL-80 will log the traffic alarms and event alarms passing through the Firewall. The Administrator can click Alarm on the left menu to get the logs of flow and event alarms of the specified policy.
  • Page 71 Service: Services supported by Virtual Servers (or Mapped IP). Action: Control actions to permit or deny packets from external networks to Virtual Server/Mapped IP travelling through the DFL-80. Option: Specify the monitoring functions on packets from external networks to Virtual Server/Mapped IP travelling through the Firewall.
  • Page 72 Adding an Incoming Policy: Step 1: Under Incoming of the Policy menu, click the New Entry button. Step 2: Source Address: Select names of the external networks from the drop down list. The drop down list contains the names of all external networks defined in the External section of the Address menu.
  • Page 73 Modifying Incoming Policy: Step 1: In the Incoming window, locate the name of policy desired to be modified and click its corresponding Modify option in the Configure field. Step 2: In the Modify Policy window, fill in new settings. Step 3: Click OK to save modifications or click Cancel to cancel modifications. Removing an Incoming Policy: Step 1: In the Incoming window, locate the name of policy desired to be removed and click its corresponding Remove in the Configure field.
  • Page 74 ! Service: Services supported by servers in DMZ network. ! Action: Control actions, to permit or deny packets from external networks to DMZ travelling through the DFL-80. ! Option: Specify the monitoring functions of packets from external network to DMZ network travelling through Firewall.
  • Page 75 Adding a new External To DMZ Policy: Step 1: Click the New Entry button and the Add New Policy window will appear. Step 2: Source Address: Select names of the external networks from the drop down list. The drop down list contains the names of all external networks defined in the External section of the Address menu.
  • Page 76 Modifying an External to DMZ policy: Step 1: In the External To DMZ window, locate the name of policy desired to be modified and click its corresponding Modify option in the Configure field. Step 2: In the Modify Policy window, fill in new settings. Step 3: Click OK to do save modifications.
  • Page 77 ! Service: services supported by Servers of external networks. ! Action: control actions, to permit or deny packets from the DMZ network to external networks travelling through the DFL-80. ! Option: specify the monitoring functions on packets from the DMZ network to external networks travelling through the Firewall.
  • Page 78 Adding a DMZ To External Policy: Step 1: Click the New Entry button and the Add New Policy window will appear. Step 2: Source Address: Select the name of the DMZ network from the drop down list. The drop down list will contain names of DMZ networks defined in DMZ section of the Address menu.
  • Page 79 Modifying a DMZ To External policy: Step 1: In the DMZ to External window, locate the name of policy desired to be modified and click its corresponding Modify option in the Configure field. Step 2: In the Modify Policy window, fill in new settings. Note: To change or add selections in the drop-down list, go to the section where the selections are setup.
  • Page 80 Remove option in the Configure field. Step 2. In the Remove confirmation dialogue box, click OK. The DFL-80 Firewall’s VPN (Virtual Private Network) is set by the System Administrator. The System Administrator can add, modify or remove VPN settings.
  • Page 81 Autokey IKE This chapter describes steps to create a VPN connection using Autokey IKE. Autokey IKE (Internet Key Exchange) provides a standard method to negotiate keys between two security gateways. For example, with two firewall devices, IKE allows new keys to be generated after a set amount of time has passed or a certain threshold of traffic has been exchanged.
  • Page 82 Header (AH) is used to provide authentication. The IP Encapsulating Security Header (ESP) is used to provide confidentially to IP datagrams. ! ESP-Encryption Algorithm: The DFL-80 auto-selects 56 bit DES-CBC or 168-bit Triple DES-CBC encryption algorithm. The default algorithm is 168- bit Triple DES-CBC.
  • Page 83 Modifying an Autokey IKE: Step 1: In the Autokey IKE window, locate the name of policy desired to be modified and click its corresponding Modify option in the Configure field. Step 2: In the Modify Policy window, fill in new settings. Step 3: Click OK to save modifications.
  • Page 84 Removing Autokey IKE: Step 1. Locate the name of the Autokey IKE desired to be removed and click its corresponding Delete option in the Configure field. Step 2. In the Remove confirmation pop-up box, click OK to remove the Autokey IKE or click Cancel to cancel deleting.
  • Page 85 PPTP Server Entering the PPTP Server window Step 1. Select VPN > PPTP Server. PPTP Server- Click Modify to select Enable or Disable. Client IP Range- 192.66.255.1-254 Displays the IP address range for PPTP Client connection. User Name- Displays the PPTP Client user’s name for authentication.
  • Page 86 Modifying PPTP Server Design Step 1. Select VPN > PPTP Server. Step 2. Click Modify after the Client IP Range. Step 3. In the Modify Server Design Window, enter appropriate settings. Disable PPTP- Check to disable PPTP Server. Enable PPTP- Check to enable PPTP Server. 1.
  • Page 87 Adding PPTP Server Step 1. Select VPN > PPTP Server. Click New Entry. Enter appropriate settings in the following window. Step 2. ! User name: Specify the PPTP client. This should be unique. ! Password: Specify the PPTP client password. Remote Client Single Machine: Check to connect to single computer.
  • Page 88 Modifying PPTP Server Step 1. Select VPN > PPTP Server. Step 2. In the PPTP Server window, find the PPTP server that you want to modify. Click Configure and click Modify. Step 3. Enter appropriate settings. Step 4. Click OK to save modifications or click Cancel to cancel modifica tions...
  • Page 89 Removing PPTP Server Step 1. Select VPN > PPTP Server. Step 2. In the PPTP Server window, find the PPTP server that you want to modify. Click Configure and click remove. Step 3. Click OK to remove the PPTP server or click Cancel to exit without removal.
  • Page 90 PPTP Client Entering the PPTP Client window Step 1. Select VPN > PPTP Client. Server Address: Displays the PPTP Server IP addresses.. User Name: Displays the PPTP Client user’s name for authentication. Client IP: Displays the PPTP Client’s IP address for authentication.
  • Page 91 Adding a PPTP Client Step 1. Select VPN > PPTP Client. User name: Specify the PPTP client. This should be unique. Password: Specify the PPTP client password. Server Address: Enter the PPTP Server’s IP address. Remote Server: Single Machine: Check to connect to single computer. Multi-Machine: Check to allow multiple computers connected to the PPTP server.
  • Page 92 Modifying PPTP Client Step 1. Select VPN > PPTP Client. Step 2. In the PPTP Client window, find the PPTP server that you want to modify. Click Configure and click Modify. Step 3. Enter appropriate settings. Step 4. Click OK to save modifications or click Cancel to cancel modifi cations...
  • Page 93 Removing PPTP Client Step 1. Select VPN > PPTP Client. Step 2. In the PPTP Client window, find the PPTP client that you want to modify. Click Configure and click remove. Step 3. Click OK to remove the PPTP client or click Cancel to exit without removal.

  • Page 94: Content Filtering

    Content filtering URL Blocking The Administrator may setup URL Blocking to prevent Internal network users from accessing a specific website on the Internet. Any web request coming from an Internal network computer to a blocked website will receive a blocked message instead of the website. Entering the URL blocking window: Click on URL Blocking under the Configuration menu bar.
  • Page 95 Modifying a URL Blocking policy: Step 1: In the URL Blocking window, find the policy to be modified and click the corresponding Modify option in the Configure field. Step 2: Make the necessary changes needed. Step 3: Click on OK to save changes or click on Cancel to cancel modifications.
  • Page 96 Blocked URL site: When a user from the Internal network tries to access a blocked URL, the error below will appear. General Blocking To let Popups, ActiveX, Java, or Cookies in or keep them out. Step 1: Click Content Filtering in the menu. Step 2: General Blocking detective functions.

  • Page 97: Virtual Server

    IP address. The DFL-80 Firewall’s Virtual Server can solve this problem. A virtual server has set the real IP address of the Firewall’s external network interface to be the Virtual Server IP.
  • Page 98 Mapped IP Internal private IP addresses are translated through NAT (Network Address Translation). If a server is located in the internal network, it has a private IP address, and outside users cannot connect directly to internal servers’ private IP address. To connect to an internal network server, outside users have to first connect to a real IP address of the external network, and the real IP is translated to a private IP of the internal network.
  • Page 99 Adding new IP Mapping: Step 1. In the Mapped IP window, click the New Entry button the Add New Mapped IP window will appear. External IP: select the external public IP address to be mapped. address Internal IP: enter the internal private IP address or DMZ IP which will be mapped 1-to-1 to the external IP address.
  • Page 100 Removing a Mapped IP: Step 1. In the Mapped IP table, locate the Mapped IP desired to be removed and click its corresponding Remove option in the Configure field. Step 2. In the Remove confirmation pop-up window, click OK to remove the Mapped IP or click Cancel to cancel.
  • Page 101 Adding a Virtual Server: Step 1. Click an available virtual server from Virtual Server in the Virtual Server menu bar to enter the virtual server configuration window. In the following, Virtual Server is assumed to be the chosen option: Step 2. Click the click here to configure button and the Add new Virtual Server IP window appears and asks for an IP address from the external network.
  • Page 102 When Disable appears in the drop-down list, no Virtual Server can be added.
  • Page 103 Modifying a Virtual Server IP Address: Step 1. Click the virtual server to be modified Virtual Server under the Virtual Server menu bar. A new window appears displaying the IP address and service of the specified virtual server. Step 2. Click on the Virtual Server’s IP Address button at the top of the screen.
  • Page 104 Removing a Virtual Server: Step 1. Click the virtual server to be removed in the corresponding Virtual Server option under the Virtual Server menu bar. A new window displaying the virtual server’s IP address and service appears on the screen. Step 2.
  • Page 105 ! External Service Port: Select the service from the pull down list that will be provided by the Virtual Server. Note: The services in the drop-down list are all defined in the Pre-defined and Custom section of the Service menu. Step 3.
  • Page 106 Modifying the Virtual Server configurations: Step 1. In the Virtual Server window’s service table, locate the name of the service desired to be modified and click its corresponding Modify option in the Configure field. Step 2. In the Virtual Server Configuration window, enter the new settings. Step 3.
  • Page 107 In the Remove confirmation pop-up box, click OK to remove the service or click Cancel to cancel removing. The DFL-80 VPN Firewall supports traffic logging and event logging to monitor and record services, connection times, and the source and destination network address.
  • Page 108 How to use the Log The Administrator can use the log data to monitor and manage the DFL-80 and the networks. The Administrator can view the logged data to evaluate and troubleshoot the network, such as pinpointing the source of traffic...
  • Page 109 Traffic Log: The table in the Traffic Log window displays current System statuses: ! Time: The start time of the connection. ! Source: IP address of the source network of the specific connection. ! Destination: IP address of the destination network of the specific connection.
  • Page 110 Clearing the Traffic Logs: The Administrator may clear on-line logs to keep just the most updated logs on the screen. Step 1. In the Traffic Log window, click the Clear Logs button at the bottom of the screen. Step 2. In the Clear Logs pop-up box, click OK to clear the logs or click Cancel to cancel it.

  • Page 111: Event Log

    Event Log When the DFL-80 Firewall detects events, the Administrator can get the details, such as time and description of the events from the Event Logs. Entering the Event Log window: Click the Event Log option under the Log menu and the Event Log window will appear.
  • Page 112 Downloading the Event Logs: Step 1. In the Event Log window, click the Download Logs button at the bottom of the screen. Step 2. Follow the File Download pop-up window to save the event logs into a specific directory on the hard drive. Clearing the Event Logs: The Administrator may clear on-line event logs to keep just the most updated logs on the screen.
  • Page 113 Log Report The Log Report Step 1. Click Log > Log Report. Enable Log Mail Configuration: : : : : When the Log Mail files accumulated up to 300Kbytes, router will notify administrator by email with the traffic log and event log. Note: Before enabling this function, you have to enable E-mail Alarm in Administrator.
  • Page 114 Enable Log Mail Support & Syslog Message Log Mail Configuration /Enable Log Mail Support Step 1. First, go to Admin –Select Enable E-mail Alert Notification under E-Mail Settings. Enter the e-mail address to receive the alarm notification. Click OK. Go to Log #Log Report. Check to enable Log Mail Support. Step 2.
  • Page 115 Alarm In this chapter, the Administrator can view traffic alarms and event alarms that occur and the firewall has logged. Firewall has two alarms: Traffic Alarm and Event Alarm. Traffic alarm: In control policies, the Administrator set the threshold value for traffic alarm. The System regularly checks whether the traffic for a policy exceeds its threshold value and adds a record to the traffic alarm file if it does.
  • Page 116 Traffic Alarm Entering the Traffic Alarm window: Click the Traffic Alarm option below Alarm menu to enter the Traffic Alarm window The table in the Traffic Alarm window displays the current traffic alarm logs for connections. ! Time: The start and stop time of the specific connection. ! Source: Name of the source network of the specific connection.
  • Page 117 Clearing the Traffic Alarm Logs: Step 1. In the Traffic Alarm window, click the Clear Logs button at the bottom of the screen. Step 2. In the Clear Logs pop-up box, click OK to clear the logs or click Cancel to cancel. Downloading the Traffic Alarm Logs: The Administrator can back up traffic alarm logs regularly and download it to a file on the computer.

  • Page 118: Event Alarm

    Event Alarm Entering the Event Alarm window: Click the Event Alarm option in the Alarm menu to enter the Event Alarm window. The table in the Event Alarm window displays current traffic alarm logs for connections. Time: Log time. Event: Event descriptions.
  • Page 119 Clearing Event Alarm Logs: The Administrator may clear on-line logs to keep the most updated logs on the screen. Step 1. In the Event Alarm window, click the Clear Logs button at the bottom of the screen. Step 2. In the Clear Logs pop-up box, click OK. Downloading the Event Alarm Logs: The Administrator can back up event alarm logs regularly by downloading it to a file on the computer.
  • Page 120 Statistics In this chapter, the Administrator queries the DFL-80 VPN Firewall for statistics of packets and data which passes across the Firewall. The statistics provides the Administrator with information about network traffics and network loads. What is Statistics Statistics are the statistics of packets that pass through the Firewall by control policies setup by the Administrator.
  • Page 121 Status In this section, the DFL-80 displays the status information about the Firewall. Status will display the network information from the Configuration menu. The Administrator may also use Status to check the DHCP lease time and MAC addresses for computers connected to the Firewall.

  • Page 122: Arp Table

    IP addresses and their corresponding MAC addresses. For each computer on the Internal, External, and DMZ network that replies to an ARP packet, the DFL-80 will list them in this ARP table. IP Address: The IP address of the host computer...

  • Page 123: Dhcp Clients

    Click on Status in the menu bar, then click on DHCP Clients below it. A window will appear displaying the table of DHCP clients that are connected to the DFL-80. The table will list host computers on the Internal network that obtain its IP address from the Firewall’s DHCP server function.
  • Page 124 Glossary DHCP (Dynamic Host Configuration Protocol) When a computer with no fixed IP address starts up, it asks the DHCP server for a temporary IP address. The DHCP server allocates an IP address, which falls within the same sub-network as the server and does not conflict with other computers on the network, to the client.
  • Page 125 Subnet Mask Subnet Mask is used to segment a network into 2, 4, 8, etc sub-networks. For example, take a Class B network with network number 172.16.0.0 and subnet mask 255.255.244.0. The first two numbers represents network number after segmentation. The first 3 bits of the third number is the Subnet Number.
  • Page 126 User Datagram Protocol (UDP Protocol) User Datagram Protocol is a transport layer protocol in the TCP/IP protocol stack. UDP uses application program to pack user data into packets, and IP transfer these packets into their destination. Under UDP, applications can exchange messages with least costs.
  • Page 127 Firewall The firewall has three basic functions: Restrict data to enter at a control point. Restrict data to flow out at a control point. Keep attackers away from servers. Firewall protects: Software data Hardware data Company’s reputation Firewall’s standard interfaces are External (WAN) network also known as Untrusted Network Internal (LAN) network also known as Trusted Network DMZ network also known as De-Militarized Network...
  • Page 128 IP Spoofing Data packets sent is from a fake source address. If the firewall’s policy does not restrict these packets from passing through, they could be used to attack internal servers easily. Network Address Translation NAT is the translation of IP addresses between internal or private networks and the public IP addresses on the Internet.
  • Page 129 10 minutes. If it is, a record will be added to flow alarm file. When the DFL-80 detects hacker attacks, it records the attacking data in event alarm file, and sends E-mail to system manger to take emergent steps.
  • Page 130 When a Virtual Server receives data packets, it forwards the packet to the first physical server, and the next packet to the next physical server. The DFL-80 uses Least Connection for load balancing. Least Connection: Because each physical server has different processing speeds, Least Connection forwards data packets to the physical server with the least number of connections at that time.
  • Page 131 A Mapped IP can be mapped to all services provided by a physical server. Policy The DFL-80 decides whether a data packet can pass according to values of the policies. A policy’s parameters are source address, destination address, service, permission, packets’ history, statistics and flow alarms. Policies can be divided into four categories based on the packets’...
  • Page 132 Schedule Schedule is used to set up different time intervals conveying different policies. A policy only works in specified time interval, and is automatically disabled outside the specified time interval. A specific schedule can be set to repeat every week or just happen once. Service TCP protocol and UDP protocol provided different services.
  • Page 133 Virtual Server The Firewall separates an enterprise’s Intranet and Internet into internal networks and external networks respectively. Generally speaking, in order to allocate enough IP addresses for all computers, an enterprise assigns each computer a private IP address, and converts it into a real IP address through the firewall’s NAT (Network Address Translation) function.

  • Page 134: Troubleshooting

    Trouble-Shooting How to upgrade the DFL-80’s software? The DFL-80’s software and system parameters are all stored in the Flash Memory. The Flash Memory is re-writable and re-readable. Users can contact the distributors to obtain the newest version of software. After having the newest version of software from the distributor, please store it in the hard disk, then connect to the firewall’s WebUI, enter...
  • Page 135 ‘read’ privilege. What are the default settings of the DFL-80 ? The DFL-80 has three main default settings; users need to modify them to fit their environment to achieve optimum performance. 1. The system administrator’s name and password are both ‘admin’...
  • Page 136 restart the computer to activate new IP address. Run Browser and enter http://192.168.1.1 in URL field to access Firewall WebUI. Step 2: Browser will ask or the user’s name and password enter ‘admin’ and password. Step 3: Then WebUI will request the user to change password. Change it and record the new password.
  • Page 137 The IP addresses of the DFL-80’s internal interface and external interface are foundations of administration policies. If the administrator wants to change the DFL-80’s IP address, the admin will need to clean up all the administration policies and address table.
  • Page 138 Setup Examples Example 1: Allow the Internal network to be able to access the Internet Example 2: The Internal network can only access Yahoo.com website Example 3: Outside users can access the internal FTP server through Virtual Servers Example 4: Install a server inside the Internal network and have the Internet (External) users access the server through IP Mapping Example 1: Allow the Internal network to be able to access the...
  • Page 139 Example 2: The Internal network can only access Yahoo.com website. Step 1. Enter the External window under the Address menu. Step 2. Click the New Entry button. Step 3. In the Add New Address window, enter relating parameters. Step 4. Click OK to end the address table setup. Step 5.
  • Page 140 Example 3: Outside users can access the internal FTP server through Virtual Servers Step 1. Enter Virtual Server 1 under the Virtual Server menu. Step 2. Click the ‘click here to configure’ button. Step 3. Select an External IP address, then click OK. Step 4.
  • Page 141 Step 8. In the Add New Policy window, set each parameter, then click OK. Step 9. An Incoming FTP policy should now be created. Example 4: Install a server inside the Internal network and have the Internet (External) users access the server through IP Mapping Step 1.

  • Page 142: Technical Specifications

    Technical Specifications Standards IEEE 802.3 10Base-T Ethernet IEEE 802.3u 100Base-TX Fast Ethernet IEEE 802.3x Flow control ANSI / IEEE 802.3 NWay Auto-Negotiation Diagnostic LED Power (1) COM Link / Activity - RJ-45 connector, 10/100Mbps auto- negotiation, Auto-crossover cable adaptation (1) WAN Link / Activity - RJ-45 connector, 10/100Mbps auto- negotiation, Auto-crossover cable adaptation (4) LAN Link / Activity - RJ-45 connector, 10/100Mbps auto- negotiation, Auto-crossover cable adaptation...
  • Page 143 Technical Specifications Physical Dimensions: L = 9.25 inches (233 mm) W = 6.5 inches (165 mm) H = 1.38 inches (35 mm) Modulation Techniques: IP Sec IP Authentication Header (AH) Internet Key Exchange (IKE) authentication and Key Management Authentication (MD5 / SHA-1) NULL/DES/3DES Encryption Algorithm and their use with IPSec IP Encapsulating Security Payload (ESP)

  • Page 144: Contacting Technical Support

    Contacting Technical Support You can find the most recent software and user documentation on the D-Link website. D-Link provides free technical support for customers within the United States for the duration of the warranty period on this product. U.S. customers can contact D-Link technical support through our web site, or by phone.

  • Page 145: Warranty And Registration

    D-Link’s sole obligation shall be to repair or replace the defective Hardware during the Warranty Period at no charge to the original owner or to refund at D-Link’s sole discretion. Such repair or replacement will be rendered by D-Link at an Authorized D-Link Service Office. The replacement Hardware need not be new or have an identical make, model or part.
  • Page 146 Canada) D-Link may reject or return any product that is not packaged and shipped in strict compliance with the foregoing requirements, or for which an RMA number is not visible from the outside of the package. The product owner agrees to pay D-Link’s reasonable handling and return shipping charges for any product...
  • Page 147 LIABILITY OF D-LINK UNDER THIS WARRANTY IS LIMITED TO THE PURCHASE PRICE OF THE PRODUCT COVERED BY THE WARRANTY. THE FOREGOING EXPRESS WRITTEN WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ANY OTHER WARRANTIES OR REMEDIES, EXPRESS, IMPLIED OR STATUTORY.

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