判断当前主机是不是阿里云内网

  static void Main(string[] args)
        {
           Console.WriteLine(IsAliyunInsideNetwork());
           Console.WriteLine(Ping("oss-cn-qingdao.aliyuncs.com"));
           Console.ReadKey();
        }

        /// <summary>
        /// 功能：判断本机是不是阿里云内网
        /// 作者：黄海
        /// 时间：2018-06-13
        /// </summary>
        /// <returns></returns>
        public static bool IsAliyunInsideNetwork()
        {
            return Ping("oss-cn-qingdao-internal.aliyuncs.com");
        }
        /// <summary>
        /// 是否能 Ping 通指定的主机
        /// </summary>
        /// <param name="ip">ip 地址或主机名或域名</param>
        /// <returns>true 通，false 不通</returns>
        public static bool Ping(string ip)
        {
            var p = new System.Net.NetworkInformation.Ping();
            var options =
                new System.Net.NetworkInformation.PingOptions {DontFragment = true};
            var data = "Test Data!";
            var buffer = Encoding.ASCII.GetBytes(data);
            const int timeout = 1000; // Timeout 时间，单位：毫秒
            var reply = p.Send(ip, timeout, buffer, options);
            return reply != null && reply.Status == System.Net.NetworkInformation.IPStatus.Success;
        }