HP PS110 Configuration And Administration Manual page 14

Connection Type: PPTP
The Point-to-Point Tunneling Protocol (PPTP) is a common WAN protocol used for Virtual Private
Networks (VPNs) that provides a secure "tunnel" connection between the service provider and
the local network. Enter the specific PPTP information assigned by your ISP.
For more information on the WAN PPTP Connection Type, see
Connection Type: L2TP
The Layer 2 Tunneling Protocol (L2TP) is a common WAN protocol used for Virtual Private
Networks (VPNs) that provides a secure "tunnel" connection between the service provider and
the local network. Enter the specific L2TP information assigned by your ISP.
For more information on the WAN L2TP Connection Type, see
14 Using the Wizard Setup
"PPTP" on page 37.
"L2TP" on page 38.