When you have issues with your Barracuda VPN connection, you can try to restart the Barracuda VPN service.

To do this:

1. Click Start

2. Type: "Services"

3. Click Services

4. In Services search for "Barracuda Network Access Client" and right click it.

5. Click Restart

This wil restart the Barracuda client.

Double click on the Barracuda icon in the taskbar and click connect.

When you get a pop up to accept a certificate, you can answer  Yes