diff --git a/src/cas/io/bsdSocket/casDGIntfIO.cc b/src/cas/io/bsdSocket/casDGIntfIO.cc
index 25bbd46b8..c76fb3bc5 100644
--- a/src/cas/io/bsdSocket/casDGIntfIO.cc
+++ b/src/cas/io/bsdSocket/casDGIntfIO.cc
@@ -64,16 +64,6 @@ casDGIntfIO::casDGIntfIO ( caServerI & serverIn, clientBufMemoryManager & memMgr
         epicsSocketDestroy (this->sock);
         throw S_cas_internal;
     }
-    
-    status = shutdown ( this->beaconSock, SHUT_RD );
-    if ( status ) {
-        char sockErrBuf[64];
-        epicsSocketConvertErrnoToString ( 
-            sockErrBuf, sizeof ( sockErrBuf ) );
-        errlogPrintf (
-            "casDGIntfIO::casDGIntfIO() beacon sock UDP read shutdown error was %s\n", 
-            sockErrBuf );
-    }
 
     //
     // Fetch port configuration from EPICS environment variables
@@ -460,6 +450,22 @@ void casDGIntfIO::sendBeaconIO ( char & msg, unsigned length,
             }
         }
     }
+
+    {
+        // disconnect so that bogus messages arriving at the ephemeral port
+        // do not consume resources
+        osiSockAddr sockAddr;
+        memset ( &sockAddr, 0, sizeof ( sockAddr ) );
+        sockAddr.sa.sa_family = AF_UNSPEC;
+        status = connect ( this->beaconSock,
+		        & sockAddr.sa, sizeof ( sockAddr.sa ) );
+        if ( status < 0 ) {
+            char sockErrBuf[64];
+            epicsSocketConvertErrnoToString ( sockErrBuf, sizeof ( sockErrBuf ) );
+            errlogPrintf ( "%s: CA beacon socket disconnect error was \"%s\"\n",
+                __FILE__, sockErrBuf );
+        }
+    }
 }
 
 bufSizeT casDGIntfIO::optimumInBufferSize () 
diff --git a/src/rsrv/online_notify.c b/src/rsrv/online_notify.c
index faa31db28..86fecdbe5 100644
--- a/src/rsrv/online_notify.c
+++ b/src/rsrv/online_notify.c
@@ -107,16 +107,6 @@ void rsrv_online_notify_task(void *pParm)
         errlogPrintf ("CAS: online socket creation error\n");
         epicsThreadSuspendSelf ();
     }
-
-    status = shutdown ( sock, SHUT_RD );
-    if ( status ) {
-        char sockErrBuf[64];
-        epicsSocketConvertErrnoToString ( 
-            sockErrBuf, sizeof ( sockErrBuf ) );
-        errlogPrintf (
-            "online notify: beacon sock UDP read shutdown error was %s\n", 
-            sockErrBuf );
-    }
     
     status = setsockopt (sock, SOL_SOCKET, SO_BROADCAST, 
                 (char *)&true, sizeof(true));
@@ -271,6 +261,24 @@ void rsrv_online_notify_task(void *pParm)
             pNode = (osiSockAddrNode *) pNode->node.next;
         }
 
+        {
+            /*
+             * disconnect so that bogus messages arriving at the ephemeral port
+             * do not consume resources
+             */
+            osiSockAddr sockAddr;
+            memset ( &sockAddr, 0, sizeof ( sockAddr ) );
+            sockAddr.sa.sa_family = AF_UNSPEC;
+            status = connect ( sock,
+		            & sockAddr.sa, sizeof ( sockAddr.sa ) );
+            if ( status < 0 ) {
+                char sockErrBuf[64];
+                epicsSocketConvertErrnoToString ( sockErrBuf, sizeof ( sockErrBuf ) );
+                errlogPrintf ( "%s: CA beacon socket disconnect error was \"%s\"\n",
+                    __FILE__, sockErrBuf );
+            }
+        }
+
         epicsThreadSleep(delay);
         if (delay<maxdelay) {
             delay *= 2.0;