RFC 8445 - Interactive Connectivity Establishment (ICE)

Title: Interactive Connectivity Establishment (ICE): A Protocol for Network Address Translator (NAT) Traversal
Status: Standards Track
Published: July 2018
Obsoletes: RFC 5245

Abstract

This document describes a protocol for Network Address Translator (NAT) traversal for UDP-based data streams called Interactive Connectivity Establishment (ICE). ICE makes use of the Session Description Protocol (SDP) Offer/Answer model and works by exchanging candidate addresses between peers.

Main Sections

• 1. Introduction
• 2. Overview of ICE
• 3. ICE Usage
• 4. Terminology
• 5. ICE Candidate Gathering and Exchange
• 6. ICE Candidate Processing
• 7. Performing Connectivity Checks
• 8. Concluding ICE Processing
• 9. ICE Restarts
• 10. ICE Option
• 11. Keepalives
• 12. Data Handling
• 13. Extensibility Considerations
• 14. Setting Ta and RTO
• 15. Examples
• 16. STUN Extensions
• 17. Operational Considerations
• 18. IAB Considerations
• 19. Security Considerations
• 20. IANA Considerations
• 21. Changes from RFC 5245
• 22. References

Appendices

• Appendix A. Lite and Full Implementations
• Appendix B. Design Motivations
• Appendix C. Connectivity-Check Bandwidth

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