The firewall supports all commonly used WAN connection types: static, DHCP, xDSL, Wireless WAN, and ISDN. Link failover and link balancing can be configured either on a per-access-rule basis by using custom connection objects, or in a more basic configuration via route metrics. You can also select different Internet connections based on the application type.
Static Internet Connections
If your ISP assigns a static IP address or network to your Internet connection, configure a static Internet connection to connect the firewall to the Internet. You must add a route on the box layer for the network port the ISP is connected to. The connection becomes active either when the assigned IP address or the IP address within the assigned network is configured as a virtual server IP address, or if the unit is remote managed and an additional IP address is defined on box layer.
For more information, see How to Configure an ISP with Static IP Addresses.
DHCP client connections are similar to xDSL links. To view your DHCP client connections, go to NETWORK > IPConfiguration and scroll to the table Network Interface Configuration. You can identify a DHCP interface in the column Link Type/Name to the right of the Interface Name. A maximum number of twelve links can be connected.
For more information, see How to Configure an ISP with Dynamic IP Addresses (DHCP).
The firewall supports dial-in PPPoE and PPTP connections using an external DSL modem. Four parallel xDSL connections are supported for the external DSL modem. Ports ppp1 - ppp4 are reserved for xDSL connections.
For more information, see xDSL WAN Connections.
Wireless WAN Connections
Wireless WAN connections are ideal for backup lines or for use in mobile offices or locations with no terrestrial Internet links. To use all WWAN features of the firewall, it is recommended that you use the Barracuda Networks WWAN Modem.
For information on how to configure WWAN connections, see How to Configure an ISP using a WWAN Modem.
Link Balancing and Failover
Configure link balancing and failover to optimize usage of two or more WAN connections. Use custom connection objects to select the optimal connection for the traffic handled by that access rule. You can define multiple connection objects, each with a different failover or link balancing policy. You can also use route metrics for basic link failover functionality.
For information on link balancing for multiple WAN connections, see
For information on link balancing for multiple DHCP or xDSL connections, see