VPN
IPsec (IP Security Architecture)
You can use IPsec to encrypt IP packets. IPsec is primarily used as a method for communicating safely over the Internet by encrypting all the original packets and attaching a new IP header.
PPTP (Point to Point Tunneling Protocol)
PPTP is an encryption protocol proposed by Microsoft.
IPIP (IPv4 over IPv4)
You can use IPIP to add additional IP headers to IP packets. IPIP does not offer encryption, so it should be used in closed network services and other environments in which safe communications are provided. Because IPIP does not make the router perform encryption processing, which imposes a heavy load on a router, it makes high-speed communication possible.
L2TP/IPsec
You can access to LAN securely through L2TP/IPsec with Smartphone & Tablets.
