[Cryptography] peering through NAT

Ángel angel at crypto.16bits.net
Thu May 9 19:37:17 EDT 2019

On 2019-05-09 at 21:45 +1000, jamesd at echeque.com wrote:
> NAT makes it hard to contact a computer behind nat, but Bitcoin core has 
> no problems with most nats, even when behind multiple levels of nats.
> It does something to tell the nat to direct incoming messages on port 
> 8333 to it, without the end user usually needing to manually set up port 
> forwarding.
> What is the protocol to tell a nat to forward incoming messages?
> What happens if there are two machines both running bitcoin core behind 
> the nat?

UPnP ?


Now, what does NAT traversal have to do with crypto?

And how is this question related to the “NIST announced Round 1
candidates for lightweight crypto competition” thread to which you
replied (albeit with a different subject)?


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