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Barracuda SSL VPN

This Product is End-of-Life and End-Of-Support

End-Of-Life and End-Of-Support on December 1st, 2020: All Barracuda SSL VPN sales will cease; neither new sales nor any renewals will be available. If you currently hold a maintenance and support contract, you will continue to receive our award-winning support and services until your contract expires. Please see the End-Of-Life definition as described in the End of Support and End of Life Information.

Barracuda SSL VPN Vx Quick Start Guide

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After your virtual appliance has been deployed, you must provision it. You need your Barracuda Vx license token, which you received via email or from the website when you downloaded the Barracuda SSL VPN Vx  package. The license token is a 15 character string, formatted like this: 01234-56789-ACEFG.

Before you begin 

Deploy the Barracuda SSL VPN Vx on your hypervisor. For more information, see How to Deploy Barracuda SSL VPN Vx Images.

Step 1. Open firewall ports

If your Barracuda SSL VPN Vx is located behind a corporate firewall, open the following ports on your firewall to ensure proper operation:

22TCPOutRemote diagnostics and service (recommended)
25TCPOutEmail alerts and one-time passwords
80TCPOutEnergize Updates
123UDPOutNetwork Time Protocol (NTP)
443TCPIn/OutHTTPS/SSL port for SSL VPN access and Initial VM Provisioning

External appliance administrator port (HTTP)


External appliance administrator port (HTTPS)

If PPTP or L2TP/IPsec access is required, also open the following ports:


Note: Only open the appliance administrator interface ports on 8000/8443 if you intend to manage the appliance from outside the corporate network.

Configure your network firewall to allow ICMP traffic to outside servers, and open port 443 to You must also verify that your DNS servers can resolve from the Internet.

Step 2. Start the virtual appliance, configure networking, and enter the license

You should have received your Barracuda Vx license token via email or from the website when you downloaded the Barracuda SSL VPN Vx package. If not, you can request an evaluation on the Barracuda website at or purchase one from The license token looks similar to the following: 01234-56789-ACEFG.

  1. In your hypervisor client, start the virtual appliance and allow it to boot up.
  2. From the console, log in with the following credentials:

    • Usernameadmin
    • Password: enter the serial number of your Barracuda SSL VPN.

      This default password is intended for initial access only. You must change it once you have configured your Barracuda SSL VPN. For more information, see Step 5 in this article.

  3. In the System Configuration window, use the down arrow key and select TCP/IP Configuration. Configure the following:
    • WAN IP Address
    • WAN Netmask
    • Gateway Address
    • Primary DNS Server
    • Secondary DNS Server
  4. If the Internet can be accessed only through an explicit proxy, configure the proxy server using Proxy Server Configuration (Optional), so that it reaches the Internet for provisioning.
  5. Under Licensing enter your Barracuda License Token and Default Domain to complete provisioning. The appliance will reboot as a part of the provisioning process.

Step 3. Accept the end user license agreement and verify the configuration

  1. Go to http://<your ip>:8000 to access the web interface.
  2. Read through the End User License Agreement. Scroll down to the end of the agreement.
  3. Enter the required information: Name, Email Address, and Company (if applicable). Click Accept. You are redirected to the Login page.
  4. Log into the Barracuda SSL VPN Vx web interface as administrator:
    • Usernameadmin
    • Password: enter the serial number of your Barracuda SSL VPN.
  5. Go to the BASIC > IP Configuration page and verify that the following settings are correct:
    • IP Address, Subnet Mask, and Default Gateway.
    • Primary DNS Server and Secondary DNS Server.
    • (If you are using a proxy server on your network) ProxyServer Configuration.

Step 4. Update the firmware

Go to the ADVANCED > Firmware Update page. If there is a new Latest General Release available, perform the following steps to update the system firmware:

  1. Click Download Now next to the firmware version that you want to install.
  2. When the download finishes, click Apply Now to install the firmware. The firmware installation takes a few minutes to complete.
    After the firmware has been applied, the Barracuda SSL VPN Vx automatically reboots. The login page displays when the system has come back up. 
  3. Log back into the web interface, and read the Release Notes to learn about enhancements and new features.

For more information, see Update Firmware.

Step 5. Change the administrator password for the appliance web interface

To prevent unauthorized use, you must change the default administrator password to a more secure password. Go to the BASIC > Administration page, enter your old and new passwords, and then click Save Password. This only changes the password for the appliance web interface. The password for the ssladmin user on the SSL VPN web interface must be changed separately.

Step 6. Route incoming SSL connections to the Barracuda SSL VPN Vx

Route HTTPS incoming connections on port 443 to the virtual appliance. This is typically achieved by configuring your corporate firewall to port forward SSL connections directly to the Barracuda SSL VPN Vx.

Ports for Remote Appliance Management

If you are managing the virtual appliance from outside the corporate network, the appliance administrator web interface ports on 8000/8443 need similar port forward configurations. Barracuda Networks recommends that you use the appliance web interface on port 8443 (HTTPS).

Step 7. Verify incoming SSL connections to the Barracuda SSL VPN Vx

After you configure your corporate firewall to route SSL connections to the Barracuda SSL VPN Vx, verify that you can accept incoming SSL connections.

  1. Test the connection by using a web browser from the Internet (not inside the LAN) to establish an SSL connection to the external IP address of your corporate firewall. For example, if your firewall's external IP address is, go to in your browser.
  2. When you are prompted to accept an untrusted SSL certificate, accept the warning and proceed to load the page.
    If you see the Barracuda SSL VPN login screen, this confirms that your appliance can receive connections from the Internet.

Next step

Configure your virtual machine. For instructions, see Getting Started.