diff --git a/py25/bacpypes/bvllservice.py b/py25/bacpypes/bvllservice.py
index fe1fe29..af4128c 100755
--- a/py25/bacpypes/bvllservice.py
+++ b/py25/bacpypes/bvllservice.py
@@ -102,6 +102,7 @@ class UDPMultiplexer:
             bind(self.direct, self.broadcastPort)
         else:
             self.broadcast = None
+            self.broadcastPort = None
 
         # create and bind the Annex H and J servers
         self.annexH = _MultiplexServer(self)
diff --git a/py25/bacpypes/udp.py b/py25/bacpypes/udp.py
index b917ad8..2ea59dd 100755
--- a/py25/bacpypes/udp.py
+++ b/py25/bacpypes/udp.py
@@ -253,6 +253,8 @@ class UDPDirector(asyncore.dispatcher, Server, ServiceAccessPoint):
         if _debug: UDPDirector._debug("close_socket")
 
         self.socket.close()
+        self.close()
+        self.socket = None
 
     def handle_close(self):
         """Remove this from the monitor when it's closed."""
diff --git a/py27/bacpypes/bvllservice.py b/py27/bacpypes/bvllservice.py
index 56f41d5..5abb24e 100755
--- a/py27/bacpypes/bvllservice.py
+++ b/py27/bacpypes/bvllservice.py
@@ -103,6 +103,7 @@ class UDPMultiplexer:
             bind(self.direct, self.broadcastPort)
         else:
             self.broadcast = None
+            self.broadcastPort = None
 
         # create and bind the Annex H and J servers
         self.annexH = _MultiplexServer(self)
diff --git a/py27/bacpypes/udp.py b/py27/bacpypes/udp.py
index 643c45b..589c5fd 100755
--- a/py27/bacpypes/udp.py
+++ b/py27/bacpypes/udp.py
@@ -252,6 +252,8 @@ class UDPDirector(asyncore.dispatcher, Server, ServiceAccessPoint):
         if _debug: UDPDirector._debug("close_socket")
 
         self.socket.close()
+        self.close()
+        self.socket = None
 
     def handle_close(self):
         """Remove this from the monitor when it's closed."""
diff --git a/py34/bacpypes/bvllservice.py b/py34/bacpypes/bvllservice.py
index a4d99e8..6abb5d7 100755
--- a/py34/bacpypes/bvllservice.py
+++ b/py34/bacpypes/bvllservice.py
@@ -103,6 +103,7 @@ class UDPMultiplexer:
             bind(self.direct, self.broadcastPort)
         else:
             self.broadcast = None
+            self.broadcastPort = None
 
         # create and bind the Annex H and J servers
         self.annexH = _MultiplexServer(self)
diff --git a/py34/bacpypes/udp.py b/py34/bacpypes/udp.py
index d2c1063..47ede29 100755
--- a/py34/bacpypes/udp.py
+++ b/py34/bacpypes/udp.py
@@ -252,6 +252,8 @@ class UDPDirector(asyncore.dispatcher, Server, ServiceAccessPoint):
         if _debug: UDPDirector._debug("close_socket")
 
         self.socket.close()
+        self.close()
+        self.socket = None
 
     def handle_close(self):
         """Remove this from the monitor when it's closed."""