Large Scale VPN— The Palo Alto Networks GlobalProtect Large Scale VPN
                    (LSVPN) provides a simplified mechanism to roll out a scalable hub and spoke VPN
                    with up to 1,024 satellite offices. The solution requires Palo Alto Networks
                    firewalls to be deployed at the hub and at every spoke. It uses certificates for
                    device authentication, SSL for securing communication between all components,
                    and IPSec to secure data. See 
Large Scale VPN (LSVPN).