服务端在本地时，客户端能添加引用，通道也能连接上，但将服务端放在服务器后，我在本地vs2013上添加对应的服务引用能成功，通道在打开时连接超时，
宿主是寄宿在控制台应用程序上的，客户端是winform程序

客户端代码：
MessagePushCallBack callBack = new MessagePushCallBack();
            InstanceContext context = new InstanceContext(callBack);
            ServiceReference_MessagePush.MessagePushServiceClient client = new ServiceReference_MessagePush.MessagePushServiceClient(context);
client.Open();

client.Open();-----这个地方会报错：打开操作没有在分配的超时 00:00:19.6849819 内完成。分配给此操作的时间可能已经是更长超时的一部分。
路由器端口已经映射，服务器防火墙出站入站都添加了

服务端配置：
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="abc">
          <serviceMetadata httpGetEnabled="true" httpGetUrl="http://171.221.241.17:8006/MessagePushService/metadata" />
          <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>
      </serviceBehaviors>
    </behaviors>

    <services>
      <service name="FineEx.JQSM.Back.MessagePushService" behaviorConfiguration="abc">
        <endpoint address="" binding="wsDualHttpBinding" contract="FineEx.JQSM.Back.IMessagePushService" bindingConfiguration="wsdualbinding" >
          <identity>
            <dns value="171.221.241.17" />
          </identity>
        </endpoint>

        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
        <host>
          <baseAddresses>
            <add baseAddress="http://171.221.241.17:8006/MessagePushService/" />
            <add baseAddress="net.tcp://171.221.241.17:8006/MessagePushService"/>
          </baseAddresses>
        </host>
      </service>
    </services>

    <bindings>
      <wsDualHttpBinding>
        <binding name="wsdualbinding"
                 closeTimeout="00:00:30"
                 maxReceivedMessageSize="500000"
                 maxBufferPoolSize="50000"
                 sendTimeout="00:01:00"
                 openTimeout="00:00:20"
                 receiveTimeout="00:00:30">
          <reliableSession ordered="true" inactivityTimeout="00:00:30" />
          <security mode="None">
            <message clientCredentialType="None"/>
          </security>
        </binding>
      </wsDualHttpBinding>
    </bindings>
  </system.serviceModel>
</configuration>

客户端配置自动生成的