摘要：This report is written to provide a method of building secure VPN by combination of L2TP and IPSec in order to meet the requirements of secure transmission of data and improve the VPN security technology. It remedies the secured short comes of L2TP Tunneling Protocol Tunneling Protocol and IPSec security. Simulation and analysis show that the construction method can improve the security of data transmission, and the simulation results of VPN is valuable for security professionals to refer.
