No connection could be made because the target machine actively refused it 127 0 0 1 3446

Question

I m using the WCF4 0 template -REST  I m trying to make a method that uploads a file using a stream   The problem always occur at  Stream serverStream   request GetRequestStream      Class for streaming   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  gt  0                    fileToupload Write bytearray  0  bytearray Length                   fileToupload Close                    fileToupload Dispose                              catch  Exception ex    throw new Exception ex Message                 return true                      REST project    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 Form project  for testing  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               I ve turned off the firewall and my Internet connection  but the error still exists  Is there a better way of testing the uploading method   Stack trace      at System Net Sockets Socket DoConnect EndPoint endPointSnapshot  SocketAddress socketAddress           at System Net ServicePoint ConnectSocketInternal Boolean connectFailure  Socket s4  Socket s6  Socket amp  socket  IPAddress amp  address  ConnectSocketState state  IAsyncResult asyncResult  Int32 timeout  Exception amp  exception

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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  quot Actively refused it quot  error    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

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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

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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

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I also faced problem in  Net Remoting Service in C    I got it solved in 3 steps    Change Port of Protocol in all the files whereever it is being used  Run your Host Server Program and make it active  Now run your client program

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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    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  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

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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

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You don t have to restart the PC  Restart IIS instead      Run -   cmd  as admin  and type  iisreset

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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

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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

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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

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

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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 amp  socket  IPAddress amp  address  ConnectSocketState state  IAsyncResult asyncResult  Exception amp  exception   Resolution  Set the proxy in Web config    lt system net gt       lt defaultProxy useDefaultCredentials  true  gt         lt proxy proxyaddress  http   proxy ip portno   usesystemdefault  True   gt       lt  defaultProxy gt   lt  system net gt

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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

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Introduction  I have encountered such problem when was testing my fist network app   I created  Client and Server then I ran client and suddenly exception was thrown  indeed it blocks the connection  because the port is not being listened    Error  My port was not listened by the server  because server was down   Solution  Run the Server first  so the port will be listened by server and once client tries to connect the server will handle that

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I could not restart IIexpress  This is the solution that worked for me   Cleaned the build Rebuild

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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

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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

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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

[c#] No connection could be made because the target machine actively refused it 127.0.0.1:3446

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