VPN communication source computers will simultaneously establish multiple TCP/IP connections for a single VPN session with SoftEther VPN Server, and by distributing load for communications data by using the respective connections in parallel, VPN communication data can be sent and received at high speed with low delay by SoftEther VPN protocol.Ĭommunication of VPN session by multiple TCP/IP connections.Ĭomputers that connects to VPN communications can initiate VPN connection by specifying the following parameters.
Networks whereby there are proxy servers, NAT or firewalls in the VPN communications route, special processing for TCP/IP protocol through network gateway devices and servers that are executed, an expiration date is set for each TCP/IP connection and the connection is disconnected when the expiration date is exceeded, count and transmission interval for packets of HTTPS protocol, etc., will be strictly recorded, and if there is a violation of the default standards of HTTP protocol, the TCP/IP connection will be disconnected and special processing be executed. Networks whereby there is band control equipment (QoS equipment) on the VPN communications route which intentionally band control maximum communication speed for each separate TCP/IP connection. Networks whereby there are proxy servers, NAT or firewalls in the VPN communications route that produce the delay. Networks with large delay time despite wide bandwidth. In the case where SoftEther VPN is used for a network with sufficient bandwidth, SoftEther VPN Project has succeeded in realizing higher speed and lower delay for so the user of VPN communication that you would never sense a bit of difference in whether communication is carried out via VPN or directly flowing on a physical network.Ģ.1.3 Communication Efficiency and StabilityĬommunication efficiency (throughput and response) and stability can be enhanced for the following networks when the user properly sets advanced communications parameters of SoftEther VPN protocol. 
However, as for SoftEther VPN protocol, by dexterously controlling and optimizing TCP/IP connection establish carrying out to VPN communication while developing, communication will be optimized and be more efficient then ever. This is because of the protocol itself conducts retransmission control and flow control, in some cases TCP/IP can only be used for some actual available network bands. Normally there is a problem that the drawback of communication that do not have much high efficiency in protocol based on conventional TCP/IP.
Based on TCP/IP protocol, SoftEther VPN protocol plays the role of encapsulating, encrypting and transmitting virtual Ethernet frames on a physical IP network. SoftEther VPN is a VPN system that consists of exchanging virtual Ethernet frames and communicate by VPN among VPN Client / VPN Server / VPN Bridge.
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