title: TCP Connection issue Connection refused
body: <p>even if I am having a huge value of ListenBackLog=10000 and MaxConnection=10000 then also I am getting "tcp error code 10061 target machine actively refused". Its not every time but when load increases then error start appearing and one service is not able to communicate with other.</p>
  
  <p>Following are the other values,</p>
  
  <pre><code>ListenBacklog = 10000;
  
  MaxBufferPoolSize = 500000;
  
  MaxBufferSize = 2000000000;
  
  MaxConnections = 10000;
  
  MaxReceivedMessageSize = 2000000000;
  </code></pre>
  
  <p>We already have MaxConcurrentCalls,MaxConcurrentSessions and MaxConcurrentInstances set as 10000. </p>
  
  <p>In normal condition its working fine but when load increases services are not able to communicate with each other. </p>
  
  <p>If we observer the performance counter then Calls Outstanding is lies between 150 to 250. Services are hosted as windows service.</p>
  
  <p>any suggestion or thoughts?</p>