Add sentence about UDP hole punching capabilities.

Suggested by Olivier Hault.

diff --git a/index.mdwn b/index.mdwn
index 4cea1e6..3b828b2 100644 (file)
--- a/index.mdwn
+++ b/index.mdwn
@@ -37,6 +37,11 @@ other, VPN traffic is always (if possible) sent directly to the
 destination, without going through intermediate hops.
 </dd>
 
+<dt><b>NAT traversal</b></dt>
+<dd>As long as one node in the VPN allows incoming connections on a public IP address (even if it is a dynamic IP address),
+tinc will punch UDP holes through NAT devices, allowing direct communication between peers.
+</dd>
+
 <dt><b>Easily expand your VPN</b></dt>
 <dd>When you want to add nodes to your VPN, all you have to do is add
 an extra configuration file, there is no need to start new daemons