Download the compressed file :

barracuda_network_access_client_3.2_hotfix_2_for_linux_x32-x64_0.rar

Installation instructions :

https://techlib.barracuda.com/display/BNGV52/How+to+Install+the+Barracuda+VPN+Client+for+Linux+and+Mac+OS+X

During execution, you will need to enter the appropriate authentication : User/Pass