Interactive Connectivity Establishment

Interactive Connectivity Establishment (ICE) is a term used in network technology.

It is a method for overcoming of Network Address Translators (NAT) for the Session Initiation Protocol ( SIP). ICE is not a new protocol, but already uses existing protocols, such as Session Traversal Utilities for NAT (STUN, RFC 3489 ), Traversal Using Relay NAT ( TURN ) and Realm Specific IP ( RSIP ), or if necessary the use of a relay server ( "latching ").

ICE works regardless of the number and type of NATs used. It currently has draft status at the Internet Engineering Task Force ( IETF).