Added section on EC2

Author: markofu

draft/core/security.txt

@@ -184,6 +184,13 @@ capabilities are important:
 
 - limiting incoming traffic from untrusted hosts.
 
+For AWS instances, please refer to the following documentation:
+
+- :wiki:`Amazon+EC2` wiki 652 page."
+
+which covers using Security Groups and other security features 
+within EC2.
+
 On Linux systems, the ``iptables`` interface provides access to the
 underlying ``netfilter`` firewall. On Windows systems ``netsh``
 command line interface provides access to the underlying Windows

draft/tutorial/configure-linux-iptables-firewall.txt

@@ -2,6 +2,13 @@
 Configure Linux ``iptables`` Firewall for MongoDB
 =================================================
 
+Note: For AWS instances, please refer to the following documentation:
+
+- :wiki:`Amazon+EC2` wiki 652 page."
+
+which covers using Security Groups and other security features 
+within EC2."
+
 The ``iptables`` program manages the firewall rules on Linux and
 typically comes built in with each Linux distribution. For this
 article we only need to worry about two ``iptables`` chains: