diff --git a/CHANGED b/CHANGED
index 328bbf867..417acd349 100644
--- a/CHANGED
+++ b/CHANGED
@@ -1,5 +1,6 @@
 # Add changes at the top of the list. Keep it in ASCII, and 80-char wide.
 # Do not insert empty lines here, update check depends on it.
+ - feature: 50_MOBILEALERTSGW: attribut allowfrom added
  - new:     71_YAMAHA_MC: initial release
  - bugfix:  22_HOMEMODE: - fix illegal division by zero in HOMEMODE_Luminance
                          - renamed attribute name HomeYahooWeatherDevice to
diff --git a/FHEM/50_MOBILEALERTSGW.pm b/FHEM/50_MOBILEALERTSGW.pm
index 7300f0e8a..89dabf732 100644
--- a/FHEM/50_MOBILEALERTSGW.pm
+++ b/FHEM/50_MOBILEALERTSGW.pm
@@ -34,7 +34,7 @@ sub MOBILEALERTSGW_Initialize($) {
     #$hash->{NotifyFn}= ($init_done ? "FW_Notify" : "FW_SecurityCheck");
     #$hash->{AsyncOutputFn} = "MOBILEALERTSGW_AsyncOutput";
     #$hash->{ActivateInformFn} = "MOBILEALERTSGW_ActivateInform";
-    $hash->{AttrList} = "forward:0,1 " . $readingFnAttributes;
+    $hash->{AttrList} = "forward:0,1 allowfrom " . $readingFnAttributes;
     Log3 "MOBILEALERTSGW", 5, "MOBILEALERTSGW_Initialize finished.";
 }
 
@@ -755,6 +755,9 @@ sub MOBILEALERTSGW_DecodeUDP($$$) {
     <li>forward<br>
       If value 1 is set, the data will be forwarded to the MobileAlerts Server http://www.data199.com/gateway/put .
     </li>
+    <li>allowfrom<br>
+      Sets from which hosts (gateways) IPs inputs are accepted. If not set all private IPs are allowed.
+    </li>
   </ul>
 </ul>
 
@@ -826,6 +829,9 @@ sub MOBILEALERTSGW_DecodeUDP($$$) {
     <li>forward<br>
       Wenn dieser Wert auf 1 gesetzt ist, werden die Daten zus&auml;tzlich zum MobileAlerts Server http://www.data199.com/gateway/put gesendet.
     </li>
+    <li>allowfrom<br>
+      Gibt an von welchens Host-(Gateways) IPs eingaben angenommen werden. Wenn nicht gesetzt, sind alle privaten IP-Adressen erlaubt.
+    </li>
   </ul>
 </ul>