Interactive Connectivity Establishment

The Interactive Connectivity Establishment (ICE) draft, developed by the IETF's MMUSIC working group, provides a mechanism for NAT traversal, using various techniques. In particular, it is used to allow SIP-based VoIP clients to successfully traverse the variety of firewalls that may exist between a remote user and a network. It is also used by the Jingle extension to XMPP.

External links

• IETF Journal article on ICE - read first
• ICE Tutorial
• White Paper Comparing different NAT traversal techniques – Newport Networks White Paper
• ICE - voip-info.org

IETF Specifications

• Interactive Connectivity Establishement (ICE): A Protocol for Network Address Translator (NAT) Traversal for Offer/Answer Protocols draft-ietf-mmusic-ice
• Session Traversal Utilities for NAT (STUN) draft-ietf-behave-rfc3489bis
• Traversal Using Relays around NAT (TURN): Relay Extensions to STUN draft-ietf-behave-turn

IETF Working Groups

• MMUSIC working group
• BEHAVE working group

Open Source Implementations

• PJNATH - Open Source ICE, STUN, and TURN Library
• Nice: GLib ICE library only implements ICE Lite

See Also

• Traversal Using Relay NAT (TURN)
• Realm-Specific IP (RSIP)
• Middlebox Middlebox Communications (MIDCOM)
• SOCKS
• STUN Simple Traversal of UDP through NATs
• Universal Plug and Play (UPnP)

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