"JSTUN" - Java Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translation (NAT) (by Thomas King - king[at]t-king.de - http://www.t-king.de) What is "JSTUN"? "JSTUN" is a Java-based STUN (Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translation (NAT)) implementation. STUN provides a mean for applications to discover the presence and type of fire