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Related to STUN: stun gun, Stun grenade


(Session Traversal Utilities for NAT) An IETF protocol for real-time voice, video and messaging in an IP network. STUN provides the mechanism to communicate with users behind a network address translation (NAT) firewall, which keeps their IP addresses private within the local network (LAN).

The initiating party sends a request to the STUN server, which maintains the IP addresses of the phone or computer (for video). After that, a peer-to-peer connection is established using protocols such as WebRTC or ICE. Unlike application-layer gateways (ALGs), which also support two-way communications through NATs, STUN requires no configuration in the router.

Originally known as Simple Traversal of UDP through NAT, the name was changed in 2008 in order not to mislead people in thinking it is a complete solution to traversing the NAT.

TURN (Traversal Using Relays Around NAT)
For very restrictive corporate networks, a TURN server may be required, which serves as a relay. See NAT.

In this videoconferencing example, if the networks are not too restrictive, the STUN server enables a direct connection via WebRTC. Otherwise, a TURN server can be used. (Image courtesy of Interactive Powers LLC,
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References in periodicals archive ?
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"They continued to fire the tear gas and stun grenades even when the occupants were evacuated to the ambulance."
Morrow's charges include two counts of second- degree assault, fourth-degree assault, second- degree unlawful use of a stun gun, and unlawful use of a weapon.
In cases where police pull stun guns, the report says officers also were more likely to fire them in confrontations involving minorities, as it was first reported in January after obtaining preliminary data collected from police departments around the state, Salon reported.