Method, apparatus, and device for pptp vpn based access acceleration

A PPTP VPN based access acceleration apparatus, wherein a PPTP VPN system includes a client-side, a first server, a VPN server, and a second server cluster supporting a GRE protocol connected between the first server and the VPN server, and the second sever cluster is an acceleration system, the PPTP VPN based access acceleration apparatus comprising:

• a first receive unit configured to receive a first PPTP message and a first GRE message from a same client-side and a second PPTP message, and to an encapsulated second GRE message from the VPN server that are fed back via the second server;
• a first encapsulation/de-encapsulation unit configured, based on a first network communication protocol, to encapsulate the first GRE message and de-encapsulate the encapsulated second GRE message;
• a first extraction processing unit configured to extract source addresses in the second PPTP message and a second GRE message, and change the source addresses in the second PPTP message and the second GRE message to an IP address of the client-side;
• and
• a first transmit unit configured to send the first PPTP message and an encapsulated first GRE message to the second server, and send the second PPTP message and the second GRE message, of which the source addresses are changed to the IP address of the client-side, to the client-side.

A method for PPTP VPN based access acceleration, wherein a PPTP VPN system includes a client-side, a first server, a VPN server, and a second server cluster supporting a GRE protocol connected between the first server and the VPN server, and the second sever cluster is an acceleration system, the method for PPTP VPN based access acceleration comprising:

• receiving a first PPTP message and an encapsulated first GRE message from the first server;
• de-encapsulating the encapsulated first GRE message based on a first internet communication protocol to obtain a first GRE message;
• extracting destination addresses and source addresses in the first PPTP message and the first GRE message, wherein the destination addresses are an IP address of the VPN server, and the source addresses are an IP address of the client-side;
• changing the source addresses of the first PPTP message and the first GRE message to an IP address of a second server;
• wherein the second server is arranged on the route between the first server and the VPN server and is closest to the VPN server;
• and
• according to the destination addresses, sending the first PPTP message and the first GRE message, whose source addresses are changed to the IP address of the second server, to the VPN server.

A PPTP VPN based access acceleration apparatus, wherein a PPTP VPN system includes a client-side, a first server, a VPN server, and a second server cluster connected between the first server and the VPN server, and the second sever cluster is an acceleration system, the PPTP VPN based access acceleration apparatus comprising:

• a second receive unit configured to receive a first PPTP message and an encapsulated first GRE message from the first server, and a second PPTP message and a second GRE message from the VPN server;
• a second encapsulation/de-encapsulation unit configured, based on the first network communication protocol, to encapsulate the first GRE message and de-encapsulate an encapsulated second GRE message;
• a second extraction processing unit configured to extract source addresses in the first PPTP message and a first GRE message, and change the source addresses in the first PPTP message and the first GRE message to an IP address of the second server, wherein the extracted IP addresses are an IP address of the client-side;
• and
• a second transmit unit configured to send the first PPTP message and the first GRE message, of which the source addresses are changed to the IP address of the second server, to the VPN server, and send the second PPTP message and an encapsulated second GRE message to the first server.