Specifications

Chapter 2: Installing the Barracuda Link Balancer 13
Link Balancer, do not power off during an update or download. To view the progress of the
download, click
Refresh. You will be notified when the download is complete.
3. Click
Apply Now to apply the firmware. Click OK to acknowledge the reboot message. Applying
the firmware takes a few minutes to complete.
4. After the firmware has been applied, the Barracuda Link Balancer automatically reboots. When
the system comes back up, the login page is displayed. Log in again.
Step 4: Disable the Barracuda Link Balancer Firewall
Because you are going to use your existing firewall, you must disable the Barracuda Link Balancer
firewall:
1. Go to the
Basic > IP Configuration page and disable the firewall. Click OK to acknowledge the
reboot message.
2. The Barracuda Link Balancer will reboot.
Step 5: Configure WAN and LAN Permanent Settings
Configure the permanent settings for the WAN links that will be connected to the Barracuda Link
Balancer. Some of the configuration information for the WAN links is provided by your ISP. Be sure
to enter these values correctly.
1. Unplug the Ethernet cable connecting the WAN port to your office network.
2. After the Barracuda Link Balancer has rebooted, login to the Web user interface and go to the
Basic > Links page.
3. For each link that will be connected to this unit:
3a. Click the relevant WAN port in the graphic.
3b. In the Links Configuration section enter the details for the link to be connected to the
WAN port.
If the interface uses a static IP address, then you will see the
Additional IP Addresses
list. These are the externally reachable IP addresses that are behind the Barracuda Link
Balancer, including the address of your firewall. These need to be identified so that
traffic can be accepted and directed to them. The Barracuda Link Balancer is able to
locate these addresses automatically, so creating this list is optional but may cause a
slight increase in efficiency. To manually create the list, enter the IP addresses or click
Discover to populate a list of IP addresses of live systems that are on the same Class C
network as this WAN interface. The
Discover button is only visible if there are no
entries in the Additional IP Addresses list and if the built-in firewall is disabled.
3c. Click
Save Changes.
4. If desired, change the LAN/Management IP address of the Barracuda Link Balancer to its
permanent setting. The LAN IP address is only used for management of the Barracuda Link
Balancer. (The WAN IP addresses can also be used to access the management interface).
The LAN IP address can be any internal or public address that is reachable through your existing
firewall from the LAN. You may allocate an external IP address for it, or choose a non-routable
Note: If you are enabling inbound access to resources behind the Barracuda Link Balancer,
such as a Web server, you must provide at least one WAN link with a static IP address for
receiving the incoming traffic.