This chapter will introduce the steps and process of accessing the four-layer port TCP forwarding, which is generally used in various online games. The biggest advantage of port TCP forwarding access is convenience and speed. It can hide the source IP of the game very well. When an attacker launches a DDOS attack, he can only attack the high-defense node we assign to you. It can effectively protect the normal operation of your backend game and will not cause any impact and uncontrollable failure to the source IP server.
visit https://dash.sudun.com/view/cdn/tcp 注册账号然后登录进来后点击该地址的四层转发-转发管理，点击添加转发。如图所示：
Fill in the listening port in the return source settings - return source IP - return source port, and click Add to complete the addition of layer 4 forwarding. After the addition is completed, the specified high-protection IP will be generated. Change your client's IP to this high-protection IP to complete the access of layer 4 forwarding!