Table of Contents
Advertisement
Chapter 13.
the system will skip the invalid configuration
VPN (Virtual Private Network): VPN refers to the technology for establishing a dedicated data
communication network in the public network (such as Internet) based on ISP (Internet Service
Provider) and NSP (Network Service Provider).
13.1
PPTP
13.1.1 PPTP overview
PPTP (Point-to-Point Tunneling Protocol): PPTP is a virtual private networking protocol,
belonging to the second layer protocol. PPTP encapsulates the PPP (Point-to-Point Protocol)
frames in the IP datagrams, and sends them by IP networks, such as Internet or corporate Intranet.
The basic function of the PPTP is to transmit user data packets encapsulated using PPP in the IP
network. PPTP client is responsible for receiving the raw data from users, and encapsulates it to
the PPP packet, and then establishes a PPTP tunnel between the PPTP client and the server for
sending the PPP packet.
Typical application is to deploy the PPTP clients in the PC software of remote offices or mobile
office users, and they are used to launch the PPTP tunnel. The PPTP server is deployed in
Enterprise Center or office, used to receive a call from the PPTP client. When a PPTP tunnel
connection is established, the PPTP server receives the PPP packets from the PPTP client and
restores user's data packets, and then sends the restored packets to the end user's PC.
http://www.level1.com
entries in binding VPN
For the invalid entries,
Chapter 13 VPN
Page 145
Advertisement
Table of Contents
