Brian Candler wrote:
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)
yes, which means it might unexpectedly fail.
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