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nat traversal, how?


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The problems with implimenting a NAT transversal is legion.

If it uses TCP, then only a handful of the firewalled connections can be made "transparent" as though they're not firewalled...so 2 of them can download/upload with each other.

If it uses multicast packets, many ISPs and networking equipment won't support it.

If it uses UDP, well...we've got people who HAVE to disable DHT in µTorrent because they already cannot handle the UDP packet loads *THAT* generates!

...and the sad part was UDP is the most promising.

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