proposal: TCP rendevous

[Doug Barton]

Julian Elischer wrote:
> In this world of P2P apps it would be neat to have a way that two P2P apps
> could attach to each other even though each is through a firewall. Most
> firewalls only allow
> "outgoing" connections.

There is a great deal of work in this area in the IETF. It's mostly focused
on NAT issues, but the same techniques are applicable to hosts with globally
routable addresses behind a restrictive firewall.

I'd recommend investigating that work first before reinventing any wheels here.

hth,

Doug

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