diff --git a/src/main/java/org/gcube/portlets/gcubeckan/gcubeckandatacatalog/client/view/GCubeCkanDataCatalogPanel.java b/src/main/java/org/gcube/portlets/gcubeckan/gcubeckandatacatalog/client/view/GCubeCkanDataCatalogPanel.java
index ac1a3b3..67c19f9 100644
--- a/src/main/java/org/gcube/portlets/gcubeckan/gcubeckandatacatalog/client/view/GCubeCkanDataCatalogPanel.java
+++ b/src/main/java/org/gcube/portlets/gcubeckan/gcubeckandatacatalog/client/view/GCubeCkanDataCatalogPanel.java
@@ -21,6 +21,7 @@ import com.google.gwt.event.shared.HandlerManager;
 import com.google.gwt.http.client.URL;
 import com.google.gwt.json.client.JSONObject;
 import com.google.gwt.json.client.JSONParser;
+import com.google.gwt.json.client.JSONString;
 import com.google.gwt.json.client.JSONValue;
 import com.google.gwt.user.client.Cookies;
 import com.google.gwt.user.client.Window;
@@ -216,7 +217,15 @@ public class GCubeCkanDataCatalogPanel extends BaseViewTemplate {
 		rootPanel.add(this);
 		updateSize();
 
+		// listen for DOM messages
 		listenForPostMessage();
+		
+		// send message about gateway url
+		JSONObject obj = new JSONObject();
+		String landingPageVREs = Window.Location.getProtocol() + "//" + Window.Location.getHostName() + "/explore";
+		JSONString value = new JSONString(landingPageVREs);
+		obj.put("explore_vres_landing_page", value);
+		postMessage(obj.toString());
 	}
 
 	public static String getLatestSelectedProductIdentifier(){
@@ -320,12 +329,13 @@ public class GCubeCkanDataCatalogPanel extends BaseViewTemplate {
 	/**
 	 * Post message.
 	 *
-	 * @param msg the msg
+	 * @param msg the msg (as json)
 	 */
 	protected native void postMessage(String msg) /*-{
+	  console.log("Sending message " + msg);
 	  $wnd.postMessage(msg, "*");
 	}-*/;
-	
+
 	/**
 	 * Print a message
 	 * @param string
@@ -344,7 +354,7 @@ public class GCubeCkanDataCatalogPanel extends BaseViewTemplate {
 	  	that.@org.gcube.portlets.gcubeckan.gcubeckandatacatalog.client.view.GCubeCkanDataCatalogPanel::onPostMessage(Ljava/lang/String;Ljava/lang/String;)(msg.data, msg.origin);
 	  });
 	}-*/;
-
+	
 	/**
 	 * On post message.
 	 *
@@ -434,13 +444,13 @@ public class GCubeCkanDataCatalogPanel extends BaseViewTemplate {
 
 		return ckanAccessPoint.getBaseUrlWithContext();
 	}
-	
+
 	/**
 	 * Return the catalogue url (e.g. http://ckan-d-d4s.d4science.org:443/)
 	 * @return
 	 */
 	public String getCatalogueUrl(){
-		
+
 		printString("Base url for iframe is " + ckanAccessPoint.getCatalogueBaseUrl());
 		return ckanAccessPoint.getCatalogueBaseUrl();
 	}