No connection can be made because the target machine actively abandoned it 127.0.0.1►7240 in System.Net.Sockets.Socket

Question

I am developing a web service and a Windows service, the web service that I deployed is on a different server, and the Windows service I deployed is running on my own server, so I use the Windows service to call the web service, Everything was fine but a few days later I received the following message:

System.Net.WebException: Unable to connect to the remote server ---> 
System.Net.Sockets.SocketException: No connection could be made 
because the target machine actively refused it 127.0.0.1:57240
at 
System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress 
socketAddress) at System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP)
at
System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4,Socket 
s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception)
--- End of inner exception stack trace -
-- at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)
at System.Net.HttpWebRequest.GetRequestStream()
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)

Answer 1

because the target machine actively abandoned it 127.0.0.1∗7240

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Answer 2

, - "-". proxy/'hide ip', .

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Answer 3

57240 , , . , , , .