diff --git a/docs/traffic_shaping.xml b/docs/traffic_shaping.xml
index be79ace83..57ffed107 100644
--- a/docs/traffic_shaping.xml
+++ b/docs/traffic_shaping.xml
@@ -1063,4 +1063,11 @@ ppp0            4       90kbit          200kbit         3           default</pro
       </orderedlist>
     </section>
   </section>
+
+  <section>
+    <title>Testing Tools</title>
+
+    <para>At least one Shorewall user has found this tool helpful: <ulink
+    url="http://e2epi.internet2.edu/network-performance-toolkit.html">http://e2epi.internet2.edu/network-performance-toolkit.html</ulink></para>
+  </section>
 </article>
\ No newline at end of file