Re: proposal: TCP rendevous

From: Brian Candler (B.Candler_at_pobox.com)
Date: 11/27/05

  • Next message: Julian Elischer: "Re: proposal: TCP rendevous" 
    Date: Sun, 27 Nov 2005 21:10:14 +0000
To: Julian Elischer <julian@elischer.org>

    On Sat, Nov 26, 2005 at 10:18:49PM -0800, 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.
    >
    > It would of course be possible via a 3rd party relaying but that is
    > inneffieient and the throughput
    > would be limited by throughput limits on the 3rd party link.
    >
    > It must be possible, with the connivance of a 3rd party both parties
    > could be able
    > to make suitable 'OUTGOING' connections.
    > The 3rd party would spoof needed packets using information supplied
    > by the two parties.

    See this: http://samy.pl/chownat/

    (Haven't tried it myself, but came across it on Freshmeat a while ago. I
    imagine it must rely on the NAT firewalls not changing the source UDP port
    unless they have to)
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  • Next message: Julian Elischer: "Re: proposal: TCP rendevous"

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