VPNs
Virtual private networks (VPNs) create tunnels that
allow users/systems to connect securely over a public network, as
if they were connecting over a local area network (LAN). To set
up a VPN tunnel, you need a pair of devices that can authenticate
each other and encrypt the flow of information between them. The
devices can be a pair of Palo Alto Networks firewalls, or a Palo
Alto Networks firewall along with a VPN-capable device from another
vendor.