name: ICE
full_form: Interactive Connectivity Establishment
context: Combination of STUN, TURN, and ICE can solve most of the UDP firewall traversal issues via: Obtaining a server reflexive address via STUN Obtaining a relayed address via TURN Telling the other party about these addresses via ICE Making connectivity checks Obtaining peer reflexive addresses Summary: STUN, TURN, ICE over the default ports achieve firewall traversal of NAT/FW types 1-4, and NIMSFW type 6 (TCP Restricted NAT/FW). STUN, TURN, ICE over the allowed TCP ports (e.g. 80 or 443) achieve firewall traversal also of NIMSFW types 5 and 7 (Port Restricted NAT/FW and Specific Port TCP Restricted NAT/FW). STUN, TURN, ICE does not achieve firewall traversal of NIMSFW type 8 (Firewall with HTTP Proxy), unless the TCP connections are set up with HTTP CONNECT. STUN, TURN, ICE over TLS on the allowed TCP port (e.g. 443) achieve firewall traversal also of NIMSFW type 9 (Firewall with Deep Packet Inspection (DPI) capability and Application Awareness).
description: Interactive Connectivity Establishment (ICE) is a protocol used for NAT traversal, enabling devices behind different networks to establish peer-to-peer connections. It combines the benefits of STUN and TURN protocols to facilitate communication between endpoints in various network configurations.
explanation: The text explicitly states that ICE is a "protocol" used for NAT traversal, highlighting its role in facilitating communication between devices across networks.
section_title: 7.1.4	Conclusions on STUN, TURN and ICE
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