diff --git a/docs/useful_links.xml b/docs/useful_links.xml
index 5e15b2da2..0e55f52fb 100644
--- a/docs/useful_links.xml
+++ b/docs/useful_links.xml
@@ -122,6 +122,11 @@
           url="http://www.shorewall.net/Linuxfest2011.pdf">http://www.shorewall.net/LinuxFest2011.pdf</ulink></entry>
         </row>
 
+        <row>
+          <entry>Tom's 2013 SeaGL Presentation: <ulink
+          url="http://www.shorewall.net/SeaGL2013.pdf">http://www.shorewall.net/SeaGL2013.pdf</ulink></entry>
+        </row>
+
         <row>
           <entry>Shorewall CIA tracker <ulink
           url="http://cia.navi.cx/stats/project/shorewall">http://cia.navi.cx/stats/project/shorewall</ulink></entry>