无法建立连接,因为目标机器主动地拒绝了它127.0.0.1:3446

我使用的是 WCF4.0模板 -休息。我试图创建一个使用流上传文件的方法。

问题总是发生在

Stream serverStream = request.GetRequestStream();

流媒体类:

namespace LogicClass
{
public class StreamClass : IStreamClass
{
public bool UploadFile(string filename, Stream fileStream)
{
try
{
FileStream fileToupload = new FileStream(filename, FileMode.Create);
byte[] bytearray = new byte[10000];
int bytesRead, totalBytesRead = 0;
do
{
bytesRead = fileStream.Read(bytearray, 0, bytearray.Length);
totalBytesRead += bytesRead;
} while (bytesRead > 0);


fileToupload.Write(bytearray, 0, bytearray.Length);
fileToupload.Close();
fileToupload.Dispose();
}
catch (Exception ex) { throw new Exception(ex.Message); }
return true;
}
}
}

REST 项目:

[WebInvoke(UriTemplate = "AddStream/{filename}", Method = "POST", BodyStyle = WebMessageBodyStyle.Bare)]
public bool AddStream(string filename, System.IO.Stream fileStream)
{
LogicClass.FileComponent rest = new LogicClass.FileComponent();
return rest.AddStream(filename, fileStream);
}

Windows 窗体项目: 用于测试

private void button24_Click(object sender, EventArgs e)
{
byte[] fileStream;
using (FileStream fs = new FileStream("E:\\stream.txt", FileMode.Open, FileAccess.Read, FileShare.Read))
{
fileStream = new byte[fs.Length];
fs.Read(fileStream, 0, (int)fs.Length);
fs.Close();
fs.Dispose();
}


string baseAddress = "http://localhost:3446/File/AddStream/stream.txt";
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(baseAddress);
request.Method = "POST";
request.ContentType = "text/plain";
Stream serverStream = request.GetRequestStream();
serverStream.Write(fileStream, 0, fileStream.Length);
serverStream.Close();
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
int statusCode = (int)response.StatusCode;
StreamReader reader = new StreamReader(response.GetResponseStream());
}
}

我已经关闭了防火墙和互联网连接,但错误仍然存在。是否有更好的方法来测试上传方法?

堆栈跟踪:

DoConnect (EndPoint endPointSnapshot,SocketAddress socketAddress) 系统。网。ServicePoint.ConnectSocketInternal (布尔连接失败,Socket s4,Socket s6,Socket & Socket,IPAddress & address,ConnectSocketState 状态,IAsyncResult 异步结果,Int32超时,异常和异常)

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Check if any other program is using that port.

If an instance of the same program is still active, kill that process.

"Actively refused it" means that the host sent a reset instead of an ack when you tried to connect. It is therefore not a problem in your code. Either there is a firewall blocking the connection or the process that is hosting the service is not listening on that port. This may be because it is not running at all or because it is listening on a different port.

Once you start the process hosting your service, try netstat -anb (requires admin privileges) to verify that it is running and listening on the expected port.

update: On Linux you may need to do netstat -anp instead.

If you use WCF storm, can you even log-in to the WCF service endpoint? If not, and you are hosting it in a Windows service, you probably forgot to register that namespace. It's not very well advertised that this step is required, and it is actually annoying to do.

I use this tool to do this; it automates all those cumbersome steps.

I got a similar error message like TCP error code 10061: No connection could be made because the target machine actively refused it in my current project. I find this 10061 error code cannot distinguish the case that the service endpoint is not started and the case that it is blocked by the firewall. Often, the firewall can be switched off, but the problem is still there.

You can test your code in the below two ways.

  1. Insert code to get time A that service is started and time B that client sends the request to the server. If B is earlier than A, it can cause this problem.
  2. Change your server port to another port that is also available in the system. You will find the same error code reported.

Above is my fix. It works on my machine. I hope it helps!

I had a similar issue. In my case the service would work fine on the developer machine but fail when on a QA machine. It turned out that on the QA machine the application wasn't being run as an administrator and didn't have permission to register the endpoint:

HTTP could not register URL http://+:12345/Foo.svc/]. Your process does not have access rights to this namespace (see http://go.microsoft.com/fwlink/?LinkId=70353 for details).

Refer here for how to get it working without being an admin user: https://stackoverflow.com/a/885765/38258

You don't have to restart the PC. Restart IIS instead.

Run -> 'cmd'(as admin) and type "iisreset"

Check whether the port number in file Web.config of your webpage is the same as the one that is hosted on IIS.

With this error I was able to trace it, thanks to @Yaur, you need to basically check the service (WCF) if it's running and also check the outbound and inbound TCP properties on your advance firewall settings.

I had the same problem on my web server "No connection could be made because the target machine actively refused it 161.x.x.235:5672". I asked the Admin to open the port 5672 on the web server, then it worked fine.

I had a similar problem rejecting localhost and 127.0.0.1. cmd(admin) netstat -anb found the port running on 169.254.80.80 (dont know were that ip came from because my network ip was 10.0.0.5. after putting in this IP it worked. This Gives correct IP:

IPAddress ipAddress = ipHostInfo.AddressList[0];
Console.WriteLine(ipAddress.ToString());

With similar pattern, my rest client is calling the service API, the service called successfully when debugging, but not working on the published code. Error was: Unable to connect to the remote server.

Inner Exception: System.Net.Sockets.SocketException (0x80004005): No connection could be made because the target machine actively refused it serviceIP:443 at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)

Resolution: Set the proxy in Web config.

<system.net>
<defaultProxy useDefaultCredentials="true">
<proxy proxyaddress="http://proxy_ip:portno/" usesystemdefault="True"/>
</defaultProxy>
</system.net>

You must set up your system proxy You have to go through this path controlpanel>>internet option>>connnection>>LAN settings>> proxy no tik:use proxy server

I also faced problem in .Net Remoting Service in C#.

I got it solved in 3 steps:

  1. Change Port of Protocol in all the files whereever it is being used.
  2. Run your Host Server Program and make it active.
  3. Now run your client program.

I had a similar issue. In my case VPN proxy app such as Psiphon ، changed the proxy setup in windows so follow this :

in Windows 10, search change proxy settings and turn of use proxy server in the manual proxy

Make Sure all services used by your application are on, which are using host and port to utilize them . For e.g, as in my case, This error can come, If your application is utilizing a Redis server and it is not being able to connect to it on given port and host, thus producing this error .

I could not restart IIexpress. This is the solution that worked for me

  1. Cleaned the build
  2. Rebuild

For my case, I had an Angular SLA project template with ASP.NET Core.

I was trying to run the IIS Express from the Visual Studio WebUI solution, triggering the "Actively refused it" error.

enter image description here


The problem, in this case, wasn't connected with the Firewall blocking the connection.

It turned out that I had to run the Angular server independently of the Kestrel run because the Server was expecting the UI to run on a specific port but wasn't actually.


For more information, check the official Microsoft documentation.

I had similar problem. In launchSettings, my IIS Express was configured on one port, and there was another launch profile that started on another ApplicationUrl with another port.

Starting the web app up with the IIS Express profile led me to have the error.

I am using the Apache ActiveMQ Artemis AMQP message broker. I started getting the "No connection could be made because the target machine actively refused it" exception when trying to send and receive messages with the broker after a reboot. On a computer where the same type of broker still worked, netstat -anb showed that the broker was listening on the expected port 5672. On the computer with the error, the broker was not listening. On the computer with the error, starting the broker resulted in the following warning's appearing in Microsoft Event Viewer's "Windows Logs > System":

 The system failed to register host (A or AAAA) resource records for network adapter
with settings:


Adapter Name : {286EE2DA-3D81-41AE-VE5G-5D761FD3925E}
Host Name : mypc
Primary Domain Suffix : myco.com
DNS server list :
55.77.168.1, 74.86.130.1
Sent update to server : 186.952.335.157:45
IP Address(es) :
182.269.1.437


Either the DNS server does not support the DNS dynamic update protocol or the authoritative zone for the specified DNS domain name does not accept dynamic updates.


To register the DNS host (A or AAAA) resource records using the specific DNS domain name and IP addresses for this adapter, contact your DNS server or network systems administrator.

I was able to use the broker without error after I ran the following in a cmd.exe with administrative privileges, rebooted, and waited about fifteen minutes:

       ipconfig /flushdns
ipconfig /renew
ipconfig /registerdns