Thanks for your reply. These days I have a google on such kind of
technique. It seems that it was called "UDP hole punch". Could you
please tell me which RFC is in progress on such kind of mechanism? Are
there any draft standard now? I just wonder why youtube and realplayer
can works well under no standards on that. Thanks.
This is still in a bit of flux. Various Internet Drafts have been
submitted, but it's not clear yet what's going to go on the standards
track.
This work is being done in the IETF's "MMUSIC" working group, so any
follow-up questions should go to that group's mailing list.
--
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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