diff --git a/SharpSnmpLib/Messaging/ListenerBinding.cs b/SharpSnmpLib/Messaging/ListenerBinding.cs
index 62196098..389566b6 100644
--- a/SharpSnmpLib/Messaging/ListenerBinding.cs
+++ b/SharpSnmpLib/Messaging/ListenerBinding.cs
@@ -182,7 +182,7 @@ public void Start()
                 return;
             }
 
-            _socket = new Socket(addressFamily, SocketType.Dgram, ProtocolType.Udp);
+            _socket = new Socket(addressFamily, SocketType.Dgram, ProtocolType.Udp) { ExclusiveAddressUse = true };
 
             try
             {
@@ -244,10 +244,10 @@ private void AsyncBeginReceive()
             while (true)
             {
                 // If no more active, then stop.
-                if (Interlocked.Read(ref _active) == 0)
+                if (Interlocked.Read(ref _active) == Inactive)
+                {
                     return;
-
-                //Console.WriteLine("Waiting");
+                }
 
                 byte[] buffer = new byte[_bufferSize];
                 EndPoint remote = new IPEndPoint(IPAddress.Any, 0);
@@ -271,7 +271,10 @@ private void AsyncBeginReceive()
                     }
                 }
 
-                iar.AsyncWaitHandle.WaitOne();
+                if (iar != null)
+                {
+                    iar.AsyncWaitHandle.WaitOne();
+                }
             }
         }
 
@@ -279,8 +282,10 @@ private void AsyncEndReceive(IAsyncResult iar)
         {
             // If no more active, then stop. This discards the received packet, if any (indeed, we may be there either
             // because we've received a packet, or because the socket has been closed).
-            if (Interlocked.Read(ref _active) == 0)
+            if (Interlocked.Read(ref _active) == Inactive)
+            {
                 return;
+            }
 
             //// We start another receive operation.
             //AsyncBeginReceive();
@@ -289,7 +294,7 @@ private void AsyncEndReceive(IAsyncResult iar)
 
             try
             {
-                EndPoint remote = new IPEndPoint(IPAddress.Any, 0);
+                EndPoint remote = _socket.AddressFamily == AddressFamily.InterNetwork ? new IPEndPoint(IPAddress.Any, 0) : new IPEndPoint(IPAddress.IPv6Any, 0);
                 int count = _socket.EndReceiveFrom(iar, ref remote);
                 HandleMessage(new MessageParams(buffer, count, remote));
             }
diff --git a/SharpSnmpLib/Pipeline/SecureSnmpContext.cs b/SharpSnmpLib/Pipeline/SecureSnmpContext.cs
index 20034de4..ee07253e 100644
--- a/SharpSnmpLib/Pipeline/SecureSnmpContext.cs
+++ b/SharpSnmpLib/Pipeline/SecureSnmpContext.cs
@@ -142,6 +142,11 @@ public override void GenerateTooBig()
                         Request.Pdu.Variables)),
                 privacy,
                 true);
+            if (TooBig)
+            {
+                Response = null;
+                // TODO: snmpSilentDrops++;
+            }
         }
 
         /// <summary>
diff --git a/SharpSnmpLib/SharpSnmpLib.Controls.csproj b/SharpSnmpLib/SharpSnmpLib.Controls.csproj
index 689e02ba..47231ec5 100644
--- a/SharpSnmpLib/SharpSnmpLib.Controls.csproj
+++ b/SharpSnmpLib/SharpSnmpLib.Controls.csproj
@@ -34,7 +34,7 @@
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
     <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DefineConstants>TRACE;DEBUG</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>