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Barracuda Load Balancer

Step 2: How to Configure the Barracuda Load Balancer

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Before configuring the IP address and network settings, complete Step 1: How to Install a Barracuda Load Balancer.

Configure WAN IP Address and Network Settings

The Barracuda Load Balancer is assigned a default WAN IP address of

To set a new WAN IP address from the administrative console:

  1. Connect your keyboard and monitor directly to the Barracuda Load Balancer.
  2. At the barracuda login prompt, enter admin for the login and admin for the password. The User Confirmation Requested window displays the current IP configuration of the Barracuda Load Balancer.
  3. Using your Tab key, select Change and press Enter to change the WAN IP configuration.
  4. Enter the new WAN IP address, netmask, and default gateway for your Barracuda Load Balancer.
  5. Enter the IP address of your primary and secondary DNS servers.
  6. Select Save to save your changes, and then select Exit.

The new WAN IP address and network settings are applied to your Barracuda Load Balancer.

Configure Your Corporate Firewall

If your Barracuda Load Balancer is located behind a corporate firewall, refer to the following table for the ports that need to be opened on your corporate firewall to allow communication between the Barracuda Load Balancer virtual IP addresses, and remote servers.

Port Direction Protocol Description
22/8788 Out TCP Remote diagnostics and technical support services
53 Out TCP/UDP Domain Name Server (DNS)
80 Out TCP

Firmware and Energize updates (unless configured to use a proxy)

123 Out UDP Network Time Protocol (NTP)
any ports used by Services as needed as needed

1:1 NATs as needed, and any port required to access the VIP of a load balanced Service

To send system alerts and notifications to the administrator, the Barracuda Load Balancer must be able to communicate with the mail server over the port specified on the BASIC > Administration page. This may require opening that port on the firewall.

Certain protocols require additional ports to be open. Examples include FTP and streaming media protocols. When configuring Services using these protocols ensure that the additional ports required are not blocked by the firewall.

Continue with Step 3: How to Configure the Barracuda Load Balancer Web Interface.