Does STUN only work for UDP? Follow-up to how NAT Traversal and STUN work.
Why does STUN only work for UDP? Can TCP be supported?
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Kate Gerwig, Editorial Director
Because
STUN is an IP protocol, it will only support
UDP. As for
Transmission Control Protocol (TCP), it is connection oriented and operates at a higher layer than IP communications. These protocols have entirely different capabilities. TCP conversations establish sessions. UDP, STUN and IP will not guarantee a connection, but they will find and operate over the best path.
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This was first published in October 2006