WCF-没有端点在http localhost上侦听+无法建立连接，因为目标计算机主动拒绝了它=>外部网络

Question

I have issue with hosing WCF service in console. Tried to search here but could not find solution of this issue even if it is similar to other issues here.

Hosting is very simple.

C# - Host

WCFSrv = new WCFService();
WCFSrvHost = new ServiceHost(typeof(WCFService));
udaWCFSrvHost.Open();

Config:

 <system.serviceModel>
    <services>
      <service name="WCF_Service.WCFService">
        <endpoint address="" binding="basicHttpBinding" contract="WCF_Service.IWCFService">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:23456/WCFService/" />
          </baseAddresses>
        </host>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <serviceMetadata httpGetEnabled="True" httpsGetEnabled="True"/>
          <serviceDebug includeExceptionDetailInFaults="False"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <bindings>
      <basicHttpBinding>
        <binding name="BasicTimeouts" closeTimeout="00:00:30" openTimeout="00:00:30"
          receiveTimeout="00:00:30" sendTimeout="00:00:30" />
      </basicHttpBinding>
    </bindings>
  </system.serviceModel>  

I can reach service through WcfTestClient from localhost and invoke methods offered by service.

I can reach service through WcfTestClient from same network, however cant invoke methods offered by service. Once I try to invoke method I receive error message:

There was no endpoint listening at http://localhost:23456/WCFService/ that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.

...

Inner Exception:
No connection could be made because the target machine actively refused it 127.0.0.1:23456
   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)

I tried to check whether there is port 23456 open and app is listening on that port through netstat -an and port 23456 is open and listening.

When I tried to modify base address (instead of localhost:23456 I put there real IP of server in network eg 10.xx.xx.xx) I was able to invoke methods as well but this is just workaround for internal solution.

Server and port should be open to external network and accessbile through internet. I tried to reach service from internet and I am able to reach service from internet (proof that port is open) but facing to same issue => cant invoke methods due to issue written above.

Does anyone have experience with same issue and can help me please?

Answer 1

Answered in Comments, put here for completeness.

Check the client config points at your server correctly and not localhost.

Answer 2

I'm new to WCF, but I've go the same issue latelly. I've just made a config file o the client project, and a wrote there the address of the endpoint:

 <system.serviceModel>
    <services>
      <service name="WCF_Service.WCFService">
        <endpoint address="" binding="basicHttpBinding" contract="WCF_Service.IWCFService">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:23456/WCFService/" />
          </baseAddresses>
        </host>
      </service>
    </services>

You can use this reference: http://dotnetmentors.com/how-to-host-wcf-service-in-iis-7.aspx

From my point o view is very in handy. If it not works, try to recreate the project.

Answer 3

Sounds like you are binding to the wrong IP address try this:

    <host>
      <baseAddresses>
        <add baseAddress="http://0.0.0.0:23456/WCFService/" />
      </baseAddresses>
    </host>

Using 0.0.0.0 instead of localhost will bind your service to all IPs on that host machine.

Answer 4

Thanks to all for support.

Solution for my issue:

Dont use WcfTestClient to test service from external network, at least in my case I faced issues described in my question.

For beginners simple advice when you have service hosted out of IIS

1. Use config file to define WCF settings in your project (eg WCF Service Library)
2. Dont forget to copy setting from your WCF service project to Host application into app.config
3. When test from external network, use simple client app with own app.config, where endpoint has to lead to target service.

M.