注意：前提是公网域名通过备案和域名解析

1.安装nginx

yum install -y nginx

2.找到安装nginx.conf文件

    server {
        listen       80;
        listen       [::]:80;
        server_name  xxx.com.cn;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
#           root   html;
#           index  index.html index.htm;
            proxy_pass  http://101.43.39.xx:8090;
        }

        error_page 404 /404.html;
        location = /404.html {
        }

        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
        }
    }

3.重启nginx服务

cd /usr/sbin
./nginx -s reload

4.修改成功