Method to improve performance of remote TCP connection using VPN gateway
CHEN Tao1,2,WANG Shao-lin1,2,ZHANG Xi-guang1,2,YAN Bao-ping1,2
(1.Computer Network Information Center, Chinese Academy of Sciences,Beijing 100190,China;2.Graduate School, Chinese Academy of Sciences, Beijing 100049, China)Abstract:To improve the performance of remote TCP connection,this paper proposed a method named TCP-Proxy on VPN gateway.Through the modification of acknowledge number field and window field in TCP header, VPN gateway shielded TCP sender from the perception of packet loss, and thus prevented the unnecessary reduction of congestion window. Experiment shows that this method can effectively eliminate the influence of high packet loss rate,therebyincrease the utilization of VPN network and the speed of remote TCP connection.
Key words:TCP; packet loss rate; VPN; buffer technology ......