No connection could be made because the target machine actively refused it?

Sometimes I get the following error while I was doing HttpWebRequest to a WebService. I copied my code below too.

---

<pre>
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 127.0.0.1:80
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)</b>
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()
</pre>

---

ServicePointManager.CertificatePolicy = new TrustAllCertificatePolicy();
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

request.PreAuthenticate = true;
request.Credentials = networkCredential(sla);
request.Method = WebRequestMethods.Http.Post;
request.ContentType = "application/x-www-form-urlencoded";
request.Timeout = v_Timeout * 1000;

if (url.IndexOf("asmx") > 0 && parStartIndex > 0)
{
AppHelper.Logger.Append("#############" + sla.ServiceName);

using (StreamWriter reqWriter = new StreamWriter(request.GetRequestStream()))
{
while (true)
{
int index01 = parList.Length;
int index02 = parList.IndexOf("=");

if (parList.IndexOf("&") > 0)
index01 = parList.IndexOf("&");

string parName = parList.Substring(0, index02);
string parValue = parList.Substring(index02 + 1, index01 - index02 - 1);

reqWriter.Write("{0}={1}", HttpUtility.UrlEncode(parName), HttpUtility.UrlEncode(parValue));

if (index01 == parList.Length)
break;

reqWriter.Write("&");
parList = parList.Substring(index01 + 1);
}
}
}
else
{
request.ContentLength = 0;
}

response = (HttpWebResponse)request.GetResponse();

I've received this error from referencing services located on a WCFHost from my web tier. What worked for me may not apply to everyone, but I'm leaving this answer for those whom it may. The port number for my WCFHost was randomly updated by IIS, I simply had to update the end routes to the svc references in my web config. Problem solved.

Using WampServer 64bit on Windows 7 Home Premium 64bit I encountered this exact problem. After hours and hours of experimentation it became apparent that all that was needed was in my.ini to comment out one line. Then it worked fine.

commented out 1 line
socket=mysql

If you put your old /data/ files in the appropriate location, WampServer will accept all of them except for the /mysql/ folder which it over writes. So then I simply imported a backup of the /mysql/ user data from my prior development environment and ran FLUSH PRIVILEGES in a phpMyAdmin SQL window. Works great. Something must be wrong because things shouldn't be this easy.

Well, I've received this error today on Windows 8 64-bit out of the blue, for the first time, and it turns out my my.ini had been reset, and the bin/mysqld file had been deleted, among other items in the `"Program Files/MySQL/MySQL Server 5.6"` folder.

To fix it, I had to run the MySQL installer again, installing only the server, and copy a recent version of the my.ini file from `"ProgramData/MySQL/MySQL Server 5.6"`, named `my_2014-03-28T15-51-20.ini` in my case (don't know how or why that got copied there so recently) back into `"Program Files/MySQL/MySQL Server 5.6"`.

The only change to the system since MySQL worked was the installation of Native Instruments' Traktor 2 and a Traktor Audio 2 sound card, which really shouldn't have caused this problem, and no one else has used the system besides me. If anyone has a clue, it would be kind of you to comment to prevent this for me and anyone else who has encountered this.

I had the same error with my WCF service using Net TCP binding, but resolved after starting the below services in my case.

**Net.Pipe.Listener.Adapter**

**Net.TCP.Listener.Adapter**

**Net.Tcp Port Sharing Service**

I think, you need to check your proxy settings in "internet options". If you are using proxy/'hide ip' applications, this problem may be occurs.