diff --git a/build.xml b/build.xml
index 84b3845f9..3e78008e7 100644
--- a/build.xml
+++ b/build.xml
@@ -172,7 +172,10 @@
   <filter token="REPL_DATE" value="${DSTAMP}"/>
   <filter token="REPL_RELEASE" value="${releaseFile}"/>
   <filter token="REPL_VERSION" value="${releaseVersion}" />
-  <copy file="${src}/yacy.java" tofile="${build}/yacy.java" filtering="true" />
+
+  <!-- deleting old file -->
+  <delete file="${build}/yacy.java" failonerror="false"/>
+  <copy file="${src}/yacy.java" tofile="${build}/yacy.java" overwrite="true" filtering="true" />
   <copy file="${doc}/Download.html" tofile="${doc}/Download.html.up" filtering="true" />
 </target>
   	
@@ -527,6 +530,7 @@
 <target name="clean" description="make clean"> 
   <delete dir="${release_main}" failonerror="false"/>
   <delete dir="${release_ext}" failonerror="false"/>
+  <delete file="${build}/yacy.java" failonerror="false"/>
   <delete failonerror="false">    
     <fileset dir="${src}" includes="**/*.class" />
     <fileset dir="${build}" includes="**/*.class" />
diff --git a/htroot/Settings_PortForwarding.inc b/htroot/Settings_PortForwarding.inc
index a057b4cc6..5e650d1cc 100644
--- a/htroot/Settings_PortForwarding.inc
+++ b/htroot/Settings_PortForwarding.inc
@@ -3,10 +3,11 @@
 <p>You can use a remote server running a ssh demon to forward your server/proxy port.
 This is useful if you want to tunnel throug a NAT/router.
 Alternatively, you can simply set a virtual server port on your NAT/Server to enable connections from outside.</p>
+<p><font color="red">You need to install libx to use this feature</font></p>
 <table border="0" cellspacing="5">
   <tr valign="top">
     <td>Enable&nbsp;port&nbsp;forwarding:</td>
-    <td><input type="checkbox" name="portForwardingEnabled" align="top" #(portForwardingEnabled)#::checked#(/portForwardingEnabled)#></td>
+    <td><input type="checkbox" name="portForwardingEnabled" align="top" #(portForwardingEnabled)#::checked#(/portForwardingEnabled)##(portForwardingAvailable)# disabled="disabled"::#(/portForwardingAvailable)#></td>
     <td>Enabling disabling port forwarding via secure channel.</td>
   </tr>
   <tr valign="top">
@@ -41,7 +42,7 @@ Alternatively, you can simply set a virtual server port on your NAT/Server to en
     <td>&nbsp;</td>
   </tr> 
   <tr valign="top"> 
-    <td colspan="3"><input type="submit" name="portForwarding" value="Submit">&nbsp;<i>Changes will take effect immediately.</i></td>
+    <td colspan="3"><input type="submit" name="portForwarding" value="Submit"#(portForwardingAvailable)# disabled="disabled"::#(/portForwardingAvailable)#>&nbsp;<i>Changes will take effect immediately.</i></td>
   </tr>  
 </table>
 </fieldset>
diff --git a/htroot/Settings_p.java b/htroot/Settings_p.java
index 24f10ccca..d0c5b7a3e 100644
--- a/htroot/Settings_p.java
+++ b/htroot/Settings_p.java
@@ -119,6 +119,14 @@ public final class Settings_p {
         prop.put("proxy.sendViaHeader", env.getConfig("proxy.sendViaHeader", "false").equals("true") ? 1 : 0);
         
         // remote port forwarding settings
+        boolean portForwardingAvailable = false;
+        try {
+            Class.forName("de.anomic.server.serverPortForwardingSch"); 
+            portForwardingAvailable = true;
+        } catch (Exception e) {
+        } catch (Error e) {}
+        
+        prop.put("portForwardingAvailable",portForwardingAvailable? 1:0);
         prop.put("portForwardingEnabled",env.getConfig("portForwardingEnabled","false").equals("true")? 1 : 0);
         prop.put("portForwardingUseProxy",env.getConfig("portForwardingUseProxy", "false").equals("true")? 1 : 0);
         prop.put("portForwardingPort",env.getConfig("portForwardingPort", ""));
diff --git a/source/de/anomic/server/serverCore.java b/source/de/anomic/server/serverCore.java
index a3bf4f688..af3d6bc77 100644
--- a/source/de/anomic/server/serverCore.java
+++ b/source/de/anomic/server/serverCore.java
@@ -353,6 +353,11 @@ public final class serverCore extends serverAbstractThread implements serverThre
                 this.switchboard.setConfig("portForwardingEnabled", "false");
                 throw e;                
             }
+        } else {
+            serverCore.portForwardingEnabled = false;
+            serverCore.portForwarding = null;
+            yacyCore.seedDB.mySeed.put(yacySeed.IP,publicIP());
+            yacyCore.seedDB.mySeed.put(yacySeed.PORT,Integer.toString(serverCore.getPortNr(this.switchboard.getConfig("port", "8080"))));             
         }
     }