Specifications

10 Barracuda Link Balancer Administrator’s Guide
Figure 2.4 shows the example network with a Barracuda Link Balancer installed and acting as a
firewall, replacing the customer firewall. A new WAN link has been added.
In this network:
• The Barracuda Link Balancer uses the same IP address for WAN1 that the firewall had used.
• The LAN devices and the LAN interface of the Barracuda Link Balancer must be on a different
subnet than all WAN links.
• The Barracuda Link Balancer gateway IP addresses are provided by the ISPs.
• The gateway of the LAN devices is the LAN IP address of the Barracuda Link Balancer.
• Traffic to the servers is passed using port forwarding rules on the Barracuda Link Balancer.
If your servers are externally accessible, reconfigure those servers with private IP addresses. Then
create 1:1 NAT rules to map the external IP addresses to the respective private IP addresses of the
servers.
Figure 2.4: Deployment Example - Barracuda Link Balancer replacing the firewall
Overview of the Installation Steps
Table 2.2 provides an overview of the steps required to deploy the Barracuda Link Balancer in your
network.
Table 2.2: Installation Steps
In Front of Firewall Replace Your Firewall
Prepare to install, including getting a WAN link with
a static IP address.
Prepare to install.
Activate the Barracuda Link Balancer with
Temporary Network Settings.
Activate the Barracuda Link Balancer with
Temporary Network Settings.
Get Latest Firmware Version. Get Latest Firmware Version.
Disable the Barracuda Link Balancer Firewall. Configure Permanent WAN Settings.