--- a/connectors/PYRO/__init__.py	Fri Dec 21 13:51:33 2018 +0100
+++ b/connectors/PYRO/__init__.py	Mon Jan 07 11:33:34 2019 +0100
@@ -39,7 +39,6 @@
 import PSKManagement as PSK
 from runtime import PlcStatus
 
-zeroconf_service_type = '_PYRO._tcp.local.'
 # this module attribute contains a list of DNS-SD (Zeroconf) service types
 # supported by this connector confnode.
 #
@@ -71,24 +70,6 @@
     else:
         schemename = "PYROLOC"
 
-    if location.find(zeroconf_service_type) != -1:
-        try:
-            from zeroconf import Zeroconf
-            r = Zeroconf()
-            i = r.get_service_info(zeroconf_service_type, location)
-            if i is None:
-                raise Exception("'%s' not found" % location)
-            ip = str(socket.inet_ntoa(i.address))
-            port = str(i.port)
-            newlocation = ip + ':' + port
-            confnodesroot.logger.write(_("'{a1}' is located at {a2}\n").format(a1=location, a2=newlocation))
-            location = newlocation
-            r.close()
-        except Exception:
-            confnodesroot.logger.write_error(_("MDNS resolution failure for '%s'\n") % location)
-            confnodesroot.logger.write_error(traceback.format_exc())
-            return None
-
     # Try to get the proxy object
     try:
         RemotePLCObjectProxy = Pyro.core.getAttrProxyForURI(schemename + "://" + location + "/PLCObject")

--- a/connectors/__init__.py	Fri Dec 21 13:51:33 2018 +0100
+++ b/connectors/__init__.py	Mon Jan 07 11:33:34 2019 +0100
@@ -67,6 +67,11 @@
     or None if cannot connect to URI
     """
     _scheme = uri.split("://")[0].upper()
+
+    # commented code to enable for MDNS:// support
+    # _scheme, location = uri.split("://")
+    # _scheme = _scheme.upper()
+
     if _scheme == "LOCAL":
         # Local is special case
         # pyro connection to local runtime
@@ -75,6 +80,28 @@
         runtime_port = confnodesroot.AppFrame.StartLocalRuntime(
             taskbaricon=True)
         uri = "PYROLOC://127.0.0.1:" + str(runtime_port)
+
+    # commented code to enable for MDNS:// support
+    # elif _scheme == "MDNS":
+    #     try:
+    #         from zeroconf import Zeroconf
+    #         r = Zeroconf()
+    #         i = r.get_service_info(zeroconf_service_type, location)
+    #         if i is None:
+    #             raise Exception("'%s' not found" % location)
+    #         ip = str(socket.inet_ntoa(i.address))
+    #         port = str(i.port)
+    #         newlocation = ip + ':' + port
+    #         confnodesroot.logger.write(_("'{a1}' is located at {a2}\n").format(a1=location, a2=newlocation))
+    #         location = newlocation
+    #         # not a bug, but a workaround against obvious downgrade attack
+    #         scheme = "PYROS"
+    #         r.close()
+    #     except Exception:
+    #         confnodesroot.logger.write_error(_("MDNS resolution failure for '%s'\n") % location)
+    #         confnodesroot.logger.write_error(traceback.format_exc())
+    #         return None
+
     elif _scheme in connectors:
         scheme = _scheme
     elif _scheme[-1] == 'S' and _scheme[:-1] in connectors:

--- a/controls/DiscoveryPanel.py	Fri Dec 21 13:51:33 2018 +0100
+++ b/controls/DiscoveryPanel.py	Mon Jan 07 11:33:34 2019 +0100
@@ -54,7 +54,7 @@
 
     def _init_coll_ButtonGridSizer_Items(self, parent):
         parent.AddWindow(self.RefreshButton, 0, border=0, flag=0)
-        parent.AddWindow(self.ByIPCheck, 0, border=0, flag=0)
+        # parent.AddWindow(self.ByIPCheck, 0, border=0, flag=0)
 
     def _init_coll_ButtonGridSizer_Growables(self, parent):
         parent.AddGrowableCol(0)
@@ -100,8 +100,8 @@
             pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)
         self.RefreshButton.Bind(wx.EVT_BUTTON, self.OnRefreshButton)
 
-        self.ByIPCheck = wx.CheckBox(self, label=_("Use IP instead of Service Name"))
-        self.ByIPCheck.SetValue(True)
+        # self.ByIPCheck = wx.CheckBox(self, label=_("Use IP instead of Service Name"))
+        # self.ByIPCheck.SetValue(True)
 
         self._init_sizers()
         self.Fit()
@@ -190,17 +190,17 @@
 
     def GetURI(self):
         if self.LatestSelection is not None:
-            if self.ByIPCheck.IsChecked():
-                svcname, scheme, host, port = \
-                    map(lambda col:self.getColumnText(self.LatestSelection, col),
-                        range(4))
-                return ("%s://%s:%s#%s" % (scheme, host, port, svcname)) \
-                    if scheme[-1] == "S" \
-                    else ("%s://%s:%s" % (scheme, host, port))
-            else:
-                svcname = self.getColumnText(self.LatestSelection, 0)
-                connect_type = self.getColumnText(self.LatestSelection, 1)
-                return str("MDNS://%s" % svcname)
+            # if self.ByIPCheck.IsChecked():
+            svcname, scheme, host, port = \
+                map(lambda col:self.getColumnText(self.LatestSelection, col),
+                    range(4))
+            return ("%s://%s:%s#%s" % (scheme, host, port, svcname)) \
+                if scheme[-1] == "S" \
+                else ("%s://%s:%s" % (scheme, host, port))
+            # else:
+            #     svcname = self.getColumnText(self.LatestSelection, 0)
+            #     connect_type = self.getColumnText(self.LatestSelection, 1)
+            #     return str("MDNS://%s" % svcname)
         return None
 
     def remove_service(self, zeroconf, _type, name):