Configuring Your Corporate Firewall; Configuring The Barracuda Load Balancer - Barracuda Networks Load Balancer Administrator's Manual

The User Confirmation Requested window displays the current IP configuration of the
Barracuda Load Balancer.
Using your Tab key, click
3.
Enter the new WAN IP address, netmask, and default gateway for your Barracuda Load
4.
Balancer. Click
optional at this time, but if not entered at this step then they must be entered in Step 3c.) of To
configure the Barracuda Load Balancer: on page 33). Click
The new IP address and network settings are applied to your Barracuda Load Balancer.

Configuring Your Corporate Firewall

If your Barracuda Load Balancer is located behind a corporate firewall, refer to Table 3.1 for the ports
that need to be opened on your corporate firewall to allow communication between the Barracuda
Load Balancer, Virtual IP(s) and remote servers.
Table 3.1: Ports to Open on Your Corporate Firewall
Port
22
53
80
123
8000
any ports used by
Services
The Barracuda Load Balancer must be able to communicate with the mail server over the port
specified on the
Additionally, if any of the load-balanced Services require access to a designated port on the Virtual
IP for the Service, the appropriate settings will need to be configured on your corporate firewall.
Examples are load-balanced FTP services over a non-traditional port, or streaming media traffic.

Configuring the Barracuda Load Balancer

After specifying the IP address of the Barracuda Load Balancer and opening the necessary ports on
your corporate firewall, configure the Barracuda Load Balancer from the Web administration
interface. Make sure the system being used to access the Web interface is connected to the same
network as the Barracuda Load Balancer, and that the appropriate routing is in place to allow
connection to the Barracuda Load Balancer's IP address via a Web browser.
32 Barracuda Load Balancer Administrator's Guide
and click
Change
to enter your changes. (The Primary and Secondary DNS fields are
Save
Direction Protocol
Out TCP
Out TCP/UDP
Out TCP
Out UDP
Out TCP
as needed as needed
page. This may require opening that port on the firewall.
Basic > Administration
to change the WAN IP configuration.
Enter
.
Exit
Description
Remote diagnostics and technical support
services
DNS (Domain Name Server)
IPS and firmware updates (unless
configured to use a proxy)
NTP (Network Time Protocol)
The administration Web port. See Step
4c.) of To configure the Barracuda Load
Balancer: on page 33.
1:1 NATs as needed, and any port
required to access the VIP of a load-
balanced Service.