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Barracuda Web Security Agent

Fallback Service Hosts and the Barracuda Web Security Service

  • Last updated on
Note: This feature applies when using the Barracuda Web Security Agent (WSA) for Windows version 4.3.0 and higher, or the Barracuda WSA for Macintosh version 1.4.0 and higher, with the Barracuda Web Security Service. The Barracuda Web Security Service does not support Barracuda WSA 5.x for Windows or Macintosh.

With the Fallback feature, the administrator can choose an alternate Barracuda Web Security Service host for filtering web traffic for remote users who have the Barracuda WSA installed on their Windows laptop, desktop or Macintosh. Fallback is useful in case the intended service host is unavailable, or there is another service host available that has faster response times. This feature provides the administrator with the following options:

  • Configure the Barracuda WSA to automatically connect to the service host with the fastest response times instead of the current host.
  • Select the service host manually from the client (requires Barracuda WSA password to log in)

How the Fallback Feature Works

At a regular interval, the Barracuda WSA can poll Barracuda Web Security Service hosts and rank them based on response times.

With Windows: When you run the Configuration tool from the Windows Startup menu, you see the Host, Port and Bypass settings as shown in Figure 1a. Note the Host name. This is the current service host.

Figure 1a. Barracuda WSA for Windows Configuration tool displays the current Host and port.

WSS_Port_2017.png

With the Macintosh: When you select WSA Preferences from the Macintosh menu bar, you see the Host, Port and Bypass settings as shown in Figure 1b. Note the Service Host name. This is the current service host.

Figure 1b. Barracuda WSA for Macintosh WSA Preferences displays the current Service Host and port.

ServiceHostAuthKey.png

For more information about configuring the Barracuda WSA, see:

If you have configured an administrator password, you'll be prompted to enter it before you can configure the Barracuda WSA. The settings shown are those based on the last sync event between the Barracuda WSA and the service host. A sync event is triggered by any of the following:

  • User logging into Barracuda WSA
  • A network change
  • Clicking the Synchronize Settings button in the Macintosh WSA Preferences, or, for Windows, clicking on the Barracuda WSA icon in the task tray and selecting Sync;
    OR - opening the Barracuda WSA Configuration tool and clicking on Sync Settings under the Tools menu.

The sync event also updates the client with all settings configured in the Barracuda Web Security Service; the exceptions are Debug Mode, Allow Remove, and Allow Update, which are all local settings.

How to Enable the Fallback Feature

  1. In the Barracuda Web Security Service web interface, go to the REMOTE FILTERING > Web Security Agent page. 
  2. Click on the Default Profile or any other existing profile for which you want to enable or disable the feature. NOTE: This feature is, by default, NOT enabled for customers using the Barracuda WSA before this feature became available. For customer accounts created after this feature became available, the Automatically Select Service Host option is set to ON by default, and the Allow User to Change Service Host is set to OFF by default. All profiles are created based on Default Profile settings.
  3. Click the check box for Automatically Select Service Host to enable the Barracuda WSA to ping available service hosts at a regular interval and automatically switch to the host with the fastest response time.
  4. Click the check box for Allow User to Change Service Host to enable users to view available service hosts by response times and select a different host if desired. Note that whenever the Barracuda WSA syncs with the Barracuda Web Security Service, settings in the service override those in the Barracuda WSA.
  5. Make sure that all remote clients are synchronized with the server to get the new settings.

Perform these steps for EACH profile. Whatever settings you choose in the Default Profile will apply for each new profile you create.

Figure 1c. Setting Fallback feature settings in the Default Profile.

Default Profile Fallback.jpg

 

How to Configure the Fallback Feature From the Barracuda WSA

Note that settings that you configure in the Barracuda WSA client will be overridden by those in the Barracuda Web Security Service when the service syncs with the client.

With Windows:

  1. In the Configuration tool, click the Advanced button.
  2. In the Advanced window, select the Auto Select Host and Allow Change Host check boxes. Click Ok.
  3. Click on the Barracuda WSA context menu in the task tray and select Change Service Host to view and select from a list of hosts ranked by response times.

    Figure 2a. Configuring the Fallback feature with the Barracuda WSA for Windows.

ConfigurationAdvanced4.3.0.jpg

With the Macintosh:  

  1. From the menu bar, click on the Barracuda WSA icon and select WSA Preferences.
  2. Click on Allow the user to select a faster service host from menu and Automatically switch to a faster service host, if available, as shown in Figure 1b.

  3. Click on the Barracuda WSA icon in the menu bar.
  4. Click Select Service Host to view and select from a list of available hosts ranked by response times.

Figure 2b.  Barracuda WSA for Macintosh context menu.

SelectServiceHost.png

Table 1.  Interaction between Auto Select Host and Allow Change Host settings for the Fallback feature.

Auto Select Host / Automatically switchAllow Change Host / Allow the user to selectBehavior

On

On

The Barracuda WSA will poll and rank Service Host response times at regular intervals and switch to the fastest host if difference in response times is big enough.

The user will see an option to Change Service Host in the context menu (click Barracuda WSA icon in task tray) and can view the list of hosts/response times if the Barracuda WSA is not in Silent Mode.

OnOff (Default)

The Barracuda WSA will poll and rank Service Host response times at regular intervals and switch to the fastest host if difference in response times is big enough.

User cannot change the Service Host manually.

Off (Default)On

The Barracuda WSA will poll and rank Service Host response times at regular interval. The user will see an option to Change Service Host in the context menu and can view the list of hosts/response times if the Barracuda WSA is not in Silent Mode.

OffOff

The Barracuda WSA will not poll Service Hosts to measure response times. The user will not see an option to Change Service Host in the context menu. The admin can change the service host using the Host drop-down in the Configuration Tool window or in the Barracuda Web Security Service web interface.

 





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