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Barracuda CloudGen Firewall

How to Configure an xDSL WAN Connection with an Internal DSL Modem in Advanced Mode

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To set a static IP address for your internal DSL modem WAN interface, or to use two xDSL lines in active/passive mode, you must use the DSL modem advanced mode. It is not possible to configure two active xDSL lines using the internal DSL modem. In advanced mode, the DSL modem handles the xDSL connection to the provider and the firewall uses a transfer network on the ppp1 interface to connect to the Internet. The public IP address set or received by the provider is not visible on the firewall. The internal DSL modem can be configured for the following operation modes:

  • Active/Passive –  WAN2 in standby mode
  • WAN1 active – WAN2 disabled
  • WAN2 active – WAN1 disabled

Step 1. (optional) Change IP of the Internal DSL Modem

If the IP address 192.168.1.1 is already used in your internal network, change the IP address in the Barracuda DSL Modem table to an unused address.

  1. In the DSL Modem Internal IP Address drop-down list, enter a different IP address.
    scrn_shot 01.png
  2. Click Send Changes and Activate.

Step 2. Configure Additional IP

In advanced mode, a box level IP is required to communicate with the DSL modem. The additional IP address must be in the same network as the internal DSL modem.

  1. Go to CONFIGURATION > Configuration Tree > Box > Network.
  2. Click Lock.
  3. In the Additional IPv4 Addresses table, click +.
  4. Enter the Name and click OK. The Additional IPv4 Addresses window opens.
  5. Configure the additional IP address:
    • Interface Name – Select dsl1.
    • IP Address – Enter the additional IP address. E.g., 192.168.1.2
    • Associated NetmaskSelect 24-Bit.
  6. Click OK.
  7. Click Send Changes and Activate.

Step 3. Configure DSL Mode

  1. Go to CONFIGURATION > Configuration Tree > Box > Network.
  2. In the left menu, select xDSL/DHCP/ISDN. 
  3. In the Barracuda DSL Modem table, from the DSL Mode drop-down list, select Advanced Mode.

    scrn_shot 02.png

     
  4. Enable WAN1 and WAN2 interfaces according to the operations mode:
    • Active Passive
      • From the DSL DSL/WAN1 Interface list, select Enable.
      • From the DSL DSL/WAN2 Interface list, select Enable.
    • WAN1 active
      • From the DSL DSL/WAN1 Interface list, select Enable.
      • From the DSL DSL/WAN2 Interface list, select Disable.
    • WAN1 active
      • From the DSL DSL/WAN1 Interface list, select Disable.
      • From the DSL DSL/WAN2 Interface list, select Enable.
  5. Click Send Changes and Activate.

Step 4. (Active/Passive or WAN1 Active) Configure WAN1

WAN1 must be configured if you are using the DSL modem in active/passive or WAN1 active operation mode.

  1. Next to the DSL DSL/WAN1 Settings, click Set.
  2. Configure the General Properties.
  3. From the Connection Type list, select ADSL or VDSL.
  4. (optional) Configure VLAN.
    • VLAN – Select Enable.
    • VLAN IDEnter the VLAN ID according to the connection settings of your DSL provider.
    • Priority – Enter the priority according to the connection settings of your DSL provider.
    • MTU – Enter the MTU value according to the connection settings of your DSL provider.
  5. (ADSL only) Change settings in xDSL Properties section.
    • Protocol – From the list, select PPPoE or PPPoA according to the connection settings of your DSL provider.
    • VCI – Enter the value for VCI according to the connection settings of your DSL provider.
    • VPI – Enter the value for VPI according to the connection settings of your DSL provider.
    • Encapsulation – Enter the value for Encapsulation according to the connection settings of your DSL provider.
    • Modulation – Enter the value for Modulation according to the connection settings of your DSL provider.
  6. (optional) Configure ISP Address Setting.
    • Fixed IP – Select Enable.
    • Fixed IP Address – Enter the value for your static public IP.
  7. Click OK.
  8. Click Send Changes and Activate.

Step 5. (Active/Passive or WAN2 Active) Configure WAN2

WAN2 must be configured if you are using the DSL modem in active/passive or WAN2 active operation mode.

  1. Next to the DSL DSL/WAN2 Settings, click Set.
  2. From  the Connection Type list, select PPPoE or Ethernet.
  3. (optional) Configure VLAN.
    • VLAN – Select Enable.
    • Priority – Enter the priority according to the connection settings of your DSL provider.
    • MTU – Enter the MTU value according to the connection settings of your DSL provider.
  4. (PPPoE only) Change settings in Authentication table.
    • Service NameEnter the service name according to the connection settings of your DSL provider.
    • UsernameEnter the username.
    • Password – Next to New, enter your password.
    • Password – Next to Confirm, re-enter your password.
  5. (Ethernet only) Change setting in Ethernet setting.
    • IP address setting – Select static or dynamic according to the connection settings of your DSL provider.
  6. (PPPoE only) Configure ISP Address Setting.
    • Fixed IP – Select Enable.
    • Fixed IP Address – Enter the value for your static public IP.
  7. (Static only)
    • IP address – Enter the value for the IP address according to the connection settings of your DSL provider.
    • Subnet MaskEnter the value for the subnet mask according to the connection settings of your DSL provider.
    • GatewayEnter the value for the gateway according to the connection settings of your DSL provider.
  8. (Dynamic IP address only)
    • Router name (optional) – Enter the value for the router name according to the connection settings of your DSL provider.
    • Domain name (optional) – Enter the value for the domain name according to the connection settings of your DSL provider.
  9. Click OK.
  10. Click Send Changes and Activate.

Step 6. Network Activation

  1. Go to CONTROL > Box.
  2. In the left menu, expand the Network section and click Activate new network configuration.
  3. Click Failsafe.

Your are now connected to your xDSL ISP. Go to CONTROL > Network and verify that ppp1 is active.

Next Steps 

Access rules for Internet access might have to be modified because the ppp1 uses a private IP address and the default network object for Internet includes exceptions for private IP address ranges, thereby causing rules with a destination Internet to never match.

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