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Barracuda Link Balancer


As of 1st March 2019, all new sales for the Barracuda Link Balancer product will cease. Only renewals of software and hardware subscriptions for a maximum of one year is available for a limited time. 1st March 2020: All Barracuda Link Balancer 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.

How to Create Outbound Firewall Rules

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By default, all connections initiated from addresses inside the Barracuda Link Balancer are allowed. You can define firewall rules restrict outbound connectivity based on protocol, port, application, destination and/or source IP address. 

Create an Outbound Firewall Rule

  1. Log into the Barracuda Link Balancer web interface.
  2. Go to the FIREWALL > Access Rules page.
  3. To create a new firewall rule, click Add Access Rule.
  4. Enter a Name. Use the comment field to better identify a rule in the list, if desired.
  5. Select Block as the Action to block traffic that matches this rule.
  6. From the Source field, select LAN.
  7. From the Destination field, select the destination, for example: Internet.

    You may also select Explicit for one or both of them so you can configure explicit IP addresses where the rule is valid.

  8. From the Link field, select whether the rule applies to any link or only one.
  9. From the Protocol field, select whether the rule applies to any protocol or only one.
  10. Select either an application or a port for the rule:
    1. When choosing the application option, select whether the rule should apply to any (*) application or only one from the Application list.

      Applications let you define rules that apply to more than one port. You can define an application using the Policy > Applications page (see How to Create Custom Applications).

    2. When choosing the port option, enter one port, a list of comma-separated ports, or a hyphenated range in the Port field.
  11. In the Start Time and End Time fields, define a time interval in HH:MM (24 hour format) during which the rule is active. If desired, narrow the time span to certain days of the week.
  12. Click Add Rule.

The outbound firewall rule is now created and appears in the Inbound/Outbound Firewall Rules list. To change an existing firewall rule, click the Edit icon under the Actions column, modify the rule and click Save Changes.

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