> -----Original Message-----
> From: Alex Pankratov
> 
> Additionally, regarding TCP NAT traversal. In my experience
> a simple symmetrical TCP open works very well for connecting
> two NATed peers as long as the port prediction is accurate.
>
> -----Original Message-----
> From: Jeff Capone
> 
> Actually, 2 simultanous opens rarely works from what we have seen since it
> is unlikely that the SYN packets from both sides will make it through.

Are we talking about the same thing here?  I was under the impression that
the simultaneous open TCP strategy required very tight timing to ensure the
SYN windows opened at the same time, and thus this didn't work much in the
real world.

Alex -- Were you able to get this working well?  What fraction of Hamachi's
NAT traversal is done over UDP versus TCP?

-david

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