diff --git a/docs/useful_links.xml b/docs/useful_links.xml
index 0e55f52fb..5e994c688 100644
--- a/docs/useful_links.xml
+++ b/docs/useful_links.xml
@@ -32,7 +32,7 @@
         <row>
           <entry>NIST <emphasis>Guide on Firewalls and Firewall
           Policy</emphasis> - <ulink
-          url="http://csrc.nist.gov/publications/nistpubs/800-41/sp800-41.pdf">http://csrc.nist.gov/publications/nistpubs/800-41/sp800-41.pdf</ulink></entry>
+          url="http://csrc.nist.gov/publications/nistpubs/800-41-Rev1/sp800-41-rev1.pdf">http://csrc.nist.gov/publications/nistpubs/800-41-Rev1/sp800-41-rev1.pdf</ulink></entry>
         </row>
 
         <row>
@@ -59,7 +59,7 @@
 
         <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>
+          url="https://www.kernel.org/pub/linux/utils/net/iproute2/">https://www.kernel.org/pub/linux/utils/net/iproute2/</ulink></entry>
         </row>
 
         <row rowsep="0" valign="middle">
@@ -74,7 +74,7 @@
 
         <row rowsep="0" valign="middle">
           <entry>Iptables Tutorial: <ulink
-          url="http://iptables-tutorial.frozentux.net/">http://iptables-tutorial.frozentux.net/</ulink></entry>
+          url="https://www.frozentux.net/documents/iptables-tutorial/">https://www.frozentux.net/documents/iptables-tutorial/</ulink></entry>
         </row>
 
         <row rowsep="0" valign="middle">
@@ -127,10 +127,6 @@
           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>
-        </row>
       </tbody>
     </tgroup>
   </informaltable>