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The Option-ID for the TFO-Cookie is unknown, the draft say: "constant TBD (assigned by IANA)" and in the IANA-List for all assigned Option-IDs is no TFO-Option. Knows anybody the used (by current Linux or others) Option-ID? Thanks! Erik188.8.131.52 (talk) 12:15, 12 January 2014 (UTC)