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TCP Acceleration Basics

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Introduction

TCP (Transmission Control Protocol) is a widely used protocol in computer networks for transmitting data. However, in some situations, it can be slow and inefficient. This is where Kcptun comes in. Kcptun is a TCP tunneling tool that can help to accelerate TCP traffic and improve network performance. In this blog post, we will discuss how Kcptun works and its usage.

How Kcptun Works

Kcptun is based on the KCP (KCP Control Protocol) protocol, which is designed to provide reliable and efficient transmission over UDP (User Datagram Protocol). Kcptun uses KCP to encapsulate TCP traffic and transmit it over UDP. This allows Kcptun to bypass some of the limitations of TCP and improve network performance.

How kcptun works

Kcptun also provides various features to optimize traffic, such as congestion control, packet retransmission, and packet encryption. These features help to ensure that traffic is delivered reliably and efficiently.

Usage of Kcptun

net.core.rmem_max=26214400 // BDP - bandwidth delay product
net.core.rmem_default=26214400
net.core.wmem_max=26214400
net.core.wmem_default=26214400
net.core.netdev_max_backlog=2048 // proportional to -rcvwnd

KCP Client: ./client_darwin_amd64 -r "KCP_SERVER_IP:4000" -l ":8388" -mode fast3 -nocomp -autoexpire 900 -sockbuf 16777217 -dscp 46
KCP Server: ./server_linux_amd64 -t "TARGET_IP:8388" -l ":4000" -mode fast3 -nocomp -sockbuf 16777217 -dscp 46

Conclusion

Kcptun is a powerful tool that can help to accelerate TCP traffic and improve network performance. It uses the KCP protocol to bypass some of the limitations of TCP and provides various features to optimize traffic. Kcptun can be used in various situations, such as VPN, gaming, and file transfers. By using Kcptun, you can enjoy faster and more reliable network performance.

Reference

  • https://github.com/xtaci/kcptun
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