diff --git a/MessageCommunicator/MessageChannel.cs b/MessageCommunicator/MessageChannel.cs
index 3240f10..1225bd5 100644
--- a/MessageCommunicator/MessageChannel.cs
+++ b/MessageCommunicator/MessageChannel.cs
@@ -26,6 +26,12 @@ public IMessageReceiveHandler? ReceiveHandler
             set => _messageRecognizer.ReceiveHandler = value;
         }
 
+        /// <summary>
+        /// Access to internal objects.
+        /// Be careful when using them, wrong method calls can cause unexpected state!
+        /// </summary>
+        public MessageChannelInternals Internals { get; }
+
         public MessageChannel(
             ByteStreamHandlerSettings byteStreamHandlerSettings, 
             MessageRecognizerSettings messageRecognizerSettings, 
@@ -43,6 +49,8 @@ public MessageChannel(
             _messageRecognizer.ByteStreamHandler = _byteStreamHandler;
 
             this.ReceiveHandler = receiveHandler;
+            
+            this.Internals = new MessageChannelInternals(this);
         }
 
         public MessageChannel(
@@ -90,5 +98,22 @@ public Task StopAsync()
         {
             return _byteStreamHandler.StopAsync();
         }
+
+        //*********************************************************************
+        //*********************************************************************
+        //*********************************************************************
+        public class MessageChannelInternals
+        {
+            private MessageChannel _owner;
+
+            public MessageChannelInternals(MessageChannel owner)
+            {
+                _owner = owner;
+            }
+
+            public IByteStreamHandler ByteStreamHandler => _owner._byteStreamHandler;
+
+            public IMessageRecognizer MessageRecognizer => _owner._messageRecognizer;
+        }
     }
 }
diff --git a/MessageCommunicator/_ByteStreamHandler/_Tcp/TcpPassiveByteStreamHandler.cs b/MessageCommunicator/_ByteStreamHandler/_Tcp/TcpPassiveByteStreamHandler.cs
index dca5ad7..84a8d7f 100644
--- a/MessageCommunicator/_ByteStreamHandler/_Tcp/TcpPassiveByteStreamHandler.cs
+++ b/MessageCommunicator/_ByteStreamHandler/_Tcp/TcpPassiveByteStreamHandler.cs
@@ -22,6 +22,11 @@ public class TcpPassiveByteStreamHandler : TcpByteStreamHandler
 
         public ushort ListeningPort { get; }
 
+        /// <summary>
+        /// Gets the true listening port in case ListeningPort is set to 0.
+        /// </summary>
+        public ushort ActualListeningPort { get; private set; }
+
         public override bool IsRunning => _isRunning;
 
         /// <inheritdoc />
@@ -51,6 +56,7 @@ internal TcpPassiveByteStreamHandler(
 
             this.ListeningIPAddress = listeningIPAddress;
             this.ListeningPort = listeningPort;
+            this.ActualListeningPort = listeningPort;
         }
 
         /// <inheritdoc />
@@ -122,11 +128,11 @@ private async void RunConnectionMainLoop(int loopId)
             CancellationTokenSource? lastCancelTokenSource = null;
             TcpListener? tcpListener = null;
             var reconnectErrorCount = 0;
-            var currentListenerPort = this.ListeningPort;
             while(loopId == _runningLoopCounter)
             {
                 if (tcpListener == null)
                 {
+                    this.ActualListeningPort = this.ListeningPort;
                     try
                     {
                         if (this.IsLoggerSet)
@@ -137,7 +143,7 @@ private async void RunConnectionMainLoop(int loopId)
                         }
                         tcpListener = new TcpListener(this.ListeningIPAddress, this.ListeningPort);
                         tcpListener.Start();
-                        currentListenerPort = (ushort)((IPEndPoint)tcpListener.LocalEndpoint).Port;
+                        this.ActualListeningPort = (ushort)((IPEndPoint)tcpListener.LocalEndpoint).Port;
 
                         reconnectErrorCount = 0;
                         _currentListener = tcpListener;
@@ -146,7 +152,7 @@ private async void RunConnectionMainLoop(int loopId)
                         {
                             this.Log(
                                 LoggingMessageType.Info, 
-                                StringBuffer.Format("TcpListener created for port {0}", currentListenerPort));
+                                StringBuffer.Format("TcpListener created for port {0}", this.ActualListeningPort));
                         }
                     }
                     catch (Exception ex)
@@ -155,7 +161,7 @@ private async void RunConnectionMainLoop(int loopId)
                         {
                             this.Log(
                                 LoggingMessageType.Error, 
-                                StringBuffer.Format("Error while creating TcpListener for port {0}: {1}", currentListenerPort, ex.Message),
+                                StringBuffer.Format("Error while creating TcpListener for port {0}: {1}", this.ActualListeningPort, ex.Message),
                                 exception: ex);
                         }
 
@@ -182,7 +188,7 @@ await this.WaitByReconnectWaitTimeAsync(reconnectErrorCount)
                         this.Log(
                             LoggingMessageType.Info,
                             StringBuffer.Format("Listening for incoming connections on port {0}...",
-                                currentListenerPort));
+                            this.ActualListeningPort));
                     }
 
                     actTcpClient = await tcpListener.AcceptTcpClientAsync()
@@ -196,7 +202,7 @@ await this.WaitByReconnectWaitTimeAsync(reconnectErrorCount)
                             LoggingMessageType.Info,
                             StringBuffer.Format(
                                 "Got new connection on listening port {0}. Connection established between {1} and {2}", 
-                                currentListenerPort, actLocalEndPoint.ToString(), actPartnerEndPoint.ToString()));
+                                this.ActualListeningPort, actLocalEndPoint.ToString(), actPartnerEndPoint.ToString()));
                     }
                 }
                 catch (ObjectDisposedException)
@@ -212,7 +218,7 @@ await this.WaitByReconnectWaitTimeAsync(reconnectErrorCount)
                     {
                         this.Log(
                             LoggingMessageType.Error, 
-                            StringBuffer.Format("Error while listening for incoming connections on port {0}: {1}", currentListenerPort, ex.Message),
+                            StringBuffer.Format("Error while listening for incoming connections on port {0}: {1}", this.ActualListeningPort, ex.Message),
                             exception: ex);
                     }