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A comment on Firefox Send: Private, Encrypted File Sharing. Parent comment

Re:Firefox Send: Private, Encrypted File Sharing by AndrewDucker on Wednesday October 11, 2017 @10:07AM (#15449853)
Yeah, it's initial peer discovery and connection setup (if behind NAT) I'm talking about. Once you've found the other PC and got a connection set up then all is well ;-)

Do these services also act as connectors in case of double NAT?

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Re:Firefox Send: Private, Encrypted File Sharing by TD-Linux on Wednesday October 11, 2017 @08:52PM (#15454842)
STUN allows all sorts of hole-punching for cases where both peers are behind NATs. For cases where the hole-punching doesn't work (a user behind two NATs might be one case), you can use TURN which is a dumb UDP or TCP relay.
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Re:Firefox Send: Private, Encrypted File Sharing by padenot on Wednesday October 11, 2017 @12:16PM (#15450875)
They certainly can, I don't know if they do in practice. It always work for me, so I haven't investigated too much.
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