We use Barracuda SSL VPN for network connection.

The use case is just for IT staff. When the front end stuff goes down, we have a secure solution through which we can come in through the back and fix the front end facing stuff.

We mostly use it as a Web Application Firewall (WAF).

Our primary use case is to provide remote users access to our network resources. We created profiles for those users allowed to access the company systems and included some security blocks such as not copying, printing or sharing files. It means they have access and can work on the system, but nothing can be taken from the system including active directory, security issuers and such things. We're customers of Barracuda.