1.域名已经与ECS公网IP绑定

2.nginx配置如下：
server {
listen 80;
server_name nginx.XXX.com
charset gbk2312;

    location /test {
        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504 http_404;
            proxy_connect_timeout       150s;
            proxy_read_timeout          150s;
            proxy_set_header X-Forwarded-Host $host;
            proxy_set_header X-Forwarded-Server $host;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_pass      http://192.168.0.150:18080/;
    }
}

3.公网80端口已在"安全组"配置

4.nginx已正常启动

但通过"http://nginx.XXX.com/test"无法访问，出现404错误