This article describes how to set up an Internet connection with a static IP address on a Unified Firewall (e.g. cable Internet or SDSL) and assign it to an Internet object on the desktop.

  • Web browser for configuring the Unified Firewall.

    The following browsers are supported:
    • Google Chrome
    • Chromium
    • Mozilla Firefox
  • Internet access via upstream provider router

1) Setting up the network connection for Internet access:
1.1) Open the configuration interface of the Unified Firewall in your browser, change to the menu Network → Connections → Network Connections and click on the chevron icon to enter the advanced view.
1.2) Delete the entry for the interface eth0.

By default the interface eth0 is set to DHCP.

1.3) Click on the “+” icon to create a new connection.
1.4) Modify the following parameters:
  • Name: Enter a descriptive name.
  • Interface: From the drop-down menu, select the interface eth0.
  • Type: Select Static from the drop-down menu.
  • IP Addresses: Enter the IP addresses assigned by the provider along with the subnet mask. These have to be entered in CIDR notation (Classless Inter-Domain Routing) (e.g.

The first IP address is always used for general communication. If necessary, change the order of the IP addresses via the arrow symbols.

In this example the IP address range is used with a total of 8 IP addresses. Of these 5 IP addresses are usable.

  • This is the network address and therefore it cannot be used.
  • In this example this IP address is used by the Gateway (Provider router) and therefore it cannot be used.
  • - These IP addresses aren't reserved otherwise and therefore can be assigned to the Unified Firewall and used freely.
  • This is the Broadcast address and therefore it cannot be used.

1.5) Change to the WAN tab and modify the following parameters:
  • Set a checkmark next to Set default gateway.
  • Default Gateway: Enter the provider router’s IP address, which you have received from your provider.

2) Create a desktop object for the Internet connection:
2.1) Click the button to Create an Internet object.
2.2) Enter the following parameters:
  • Object Name: Enter a descriptive name.
  • Connections: From the drop-down menu, select the WAN Object created in steps 1.4 – 1.5 and click on the “+” icon to add the object.

3) Saving and activating the configuration steps:
3.1) Click on the Activate button to accept the changes and enable filtering.