diff --git a/docs/useful_links.xml b/docs/useful_links.xml
index 9206850c1..7855a9506 100644
--- a/docs/useful_links.xml
+++ b/docs/useful_links.xml
@@ -52,6 +52,11 @@
           url="http://lartc.org/">http://lartc.org/</ulink></entry>
         </row>
 
+        <row rowsep="0" valign="middle">
+          <entry align="left">Clustering Shorewall: <ulink
+          url="???">http://linuxman.wikispaces.com/Clustering+Shorewall</ulink></entry>
+        </row>
+
         <row rowsep="0" valign="middle">
           <entry align="left">Iproute Downloads: <ulink
           url="http://developer.osdl.org/dev/iproute2/download/">http://developer.osdl.org/dev/iproute2/download/</ulink></entry>