diff -urEb dcmtk-3.6.0.orig/dcmnet/libsrc/dul.cc dcmtk-3.6.0/dcmnet/libsrc/dul.cc
--- dcmtk-3.6.0.orig/dcmnet/libsrc/dul.cc	2017-03-17 15:49:23.043061969 +0100
+++ dcmtk-3.6.0/dcmnet/libsrc/dul.cc	2017-03-17 15:50:44.075359547 +0100
@@ -630,7 +630,10 @@
     if (cond.bad())
         return cond;
 
-    cond = PRV_NextPDUType(association, block, timeout, &pduType);
+    /* This is the first time we read from this new connection, so in case it
+     * doesn't speak DICOM, we shouldn't wait forever (= DUL_NOBLOCK).
+     */
+    cond = PRV_NextPDUType(association, DUL_NOBLOCK, PRV_DEFAULTTIMEOUT, &pduType);
 
     if (cond == DUL_NETWORKCLOSED)
         event = TRANS_CONN_CLOSED;
@@ -1770,7 +1773,7 @@
                 // send number of socket handle in child process over anonymous pipe
                 DWORD bytesWritten;
                 char buf[20];
-                sprintf(buf, "%i", OFreinterpret_cast(int, childSocketHandle));
+                sprintf(buf, "%i", OFstatic_cast(int, OFreinterpret_cast(size_t, childSocketHandle)));
                 if (!WriteFile(hChildStdInWriteDup, buf, strlen(buf) + 1, &bytesWritten, NULL))
                 {
                     CloseHandle(hChildStdInWriteDup);
@@ -1780,7 +1783,7 @@
                 // return OF_ok status code DULC_FORKEDCHILD with descriptive text
                 OFOStringStream stream;
                 stream << "New child process started with pid " << OFstatic_cast(int, pi.dwProcessId)
-                       << ", socketHandle " << OFreinterpret_cast(int, childSocketHandle) << OFStringStream_ends;
+                       << ", socketHandle " << OFstatic_cast(int, OFreinterpret_cast(size_t, childSocketHandle)) << OFStringStream_ends;
                 OFSTRINGSTREAM_GETOFSTRING(stream, msg)
                 return makeDcmnetCondition(DULC_FORKEDCHILD, OF_ok, msg.c_str());
             }
@@ -1840,7 +1843,7 @@
     }
 #endif
 #endif
-    setTCPBufferLength(sock);
+    //setTCPBufferLength(sock);
 
 #ifndef DONT_DISABLE_NAGLE_ALGORITHM
     /*
diff -urEb dcmtk-3.6.0.orig/dcmnet/libsrc/dulfsm.cc dcmtk-3.6.0/dcmnet/libsrc/dulfsm.cc
--- dcmtk-3.6.0.orig/dcmnet/libsrc/dulfsm.cc	2017-03-17 15:49:23.043061969 +0100
+++ dcmtk-3.6.0/dcmnet/libsrc/dulfsm.cc	2017-03-17 15:49:48.467144792 +0100
@@ -2417,7 +2417,7 @@
           return makeDcmnetCondition(DULC_TCPINITERROR, OF_error, msg.c_str());
         }
 #endif
-        setTCPBufferLength(s);
+        //setTCPBufferLength(s);
 
 #ifndef DONT_DISABLE_NAGLE_ALGORITHM
         /*