如上图，查看80端口时，被“AliYunDun”占用。
这样会不会影响nginx服务器的80端口？
我之前试验过： 把nginx服务器端口设置为80，则提示404；后来把nginx服务器端口改为81，就访问正常了。
人生最曼妙的风景，竟是内心的淡定与从容！
I found the reason. Because my website is not registered, Alibaba Cloud will lock port 80. After registration, port 80 can be accessed normally.
I just took a look and the Alibaba Cloud Shield on our server uses unix sockets. You can submit a work order in the Alibaba backend to consult the after-sales technical support. They are quite responsible and can usually give you answers.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
I found the reason. Because my website is not registered, Alibaba Cloud will lock port 80. After registration, port 80 can be accessed normally.
I just took a look and the Alibaba Cloud Shield on our server uses unix sockets. You can submit a work order in the Alibaba backend to consult the after-sales technical support. They are quite responsible and can usually give you answers.