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Barracuda Web Security Gateway

Can the Barracuda Web Filter filter web traffic across multiple VLANs?

  • Type: Knowledgebase
  • Date changed: 2 years ago
Solution #00002514

All Barracuda Web Filters, all firmware versions.

The Barracuda Web Filter does not 'tamper' with any of the tags used between VLAN-aware equipment. The 802.1Q (VLAN Tagging) protocol is a Layer 2 protocol, and we do not strip the tags anywhere in the system. However the Barracuda does not know where to send traffic that exists on VLANs other than the Barracuda. Ideally, the Barracuda should be connected to an access port, and therefore only scan a single VLAN. But if all VLANs are managed at the firewall, and the Barracuda must exist on a trunk port, additional network configuration is required for each additional VLAN.

What you will need:
  1. A list of all VLANs that pass through the Barracuda (name and number).
  2. The Subnet mask for each VLAN.
  3. Corresponding Default Gateway IP addresses for each VLAN.
  4. An unused IP address within each VLAN that is exempt from DHCP.
For up-to-date VLAN configuration information, select the Help option on the Advanced>Advanced Networking page.

Additional Notes:

When using VLAN setup you cannot use pass client IP visibility feature from the Advanced > Expert variables hidden page the option must be set to NO.

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