ejabberd has gained a STUN server, helping Jingle communications.
NAT devices, such as routers and firewalls, translate a private IP address into a public IP address. When you are not directly connected to the internet, but you are in a LAN behind a NAT, you can only know your private LAN address. Thus a Jingle contact of yours may not be able to join you.
STUN is a protocol designed to discover the mapping between your public and private address. A STUN server is located on the public internet, thus knowing the public addresses. Then if you are behind a NAT and want to initiate a Jingle session with a contact, you can discover and send your public address to this contact.
ejabberd’s STUN server will help Jingle communications to happen when parties are separated by a NAT, by providing a public service for IP addresses and ports discovery.
You can get it at:
The documentation is here: https://svn.process-one.net/ejabberd/trunk/doc/guide.html
Example DNS SRV configuration: