title: How to use Azure EventHub ProxyOptions
body: <p>In azure-java-sdk samples there is an example - PublishEventsWithWebSocketsAndProxy.java</p>
  <pre><code>// By default, the AMQP port 5671 is used, but clients can use web sockets, port 443.
          // When using web sockets, developers can specify proxy options.
          // ProxyOptions.SYSTEM_DEFAULTS can be used if developers want to use the JVM configured proxy.
          ProxyOptions proxyOptions = new ProxyOptions(ProxyAuthenticationType.DIGEST,
              new Proxy(Proxy.Type.HTTP, InetSocketAddress.createUnresolved(&quot;10.13.1.3&quot;, 9992)),
              &quot;digest-user&quot;, &quot;digest-user-password&quot;);
  
          // Instantiate a client that will be used to call the service.
          EventHubProducerClient producer = new EventHubClientBuilder()
              .transportType(AmqpTransportType.AMQP_WEB_SOCKETS)
              .proxyOptions(proxyOptions)
              .connectionString(connectionString)
              .buildProducerClient();
  </code></pre>
  <p>But I don't understand the paramter values -  10.13.1.3 , digest-user , digest-user-password</p>
  <p>can anyone tell me, if this is what I have to use, if the organization has Web App Firewall, connecting to Azure</p>