Barracuda virtual appliances are compatible with VMware open-vm-tools. These tools are bundled with each appliance. For detailed information on how to install and use these tools, please see this VMware knowledge base page (https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2073803).
Of the major features provided by the open-vm-tools, the following could be particularly useful:
- Taking quiesced snapshots of the guest OS
- Synchronizing the time in the guest operating system with the time on the host
- Supporting guest-bound calls created with the VMware VIX API