Direct connections through NAT/firewall

From: Jem Berkes (jb_at_users.pc9.org)
Date: 07/22/03 

Date: Tue, 22 Jul 2003 21:49:13 GMT

I'm involved with some research at the University of Manitoba (in Winnipeg,
Canada) this summer. My colleagues and I are in the process of developing a
method for reliably establishing direct connections over the Internet
between two hosts that are both behind NAT gateways.

The software we've come up with runs in userspace linux, so there is no
kernel or network stack tweaking required. It can easily be extended to
multiple operating systems.

No ports have to be explicitly opened at the firewall. And the method is
able to "break through" several kinds of NAT/firewalls - we've tried linux
2.4, as well as some netgear and linksys hardware routers.

Does anyone know if something like this already exists? The only technology
I've seen so far was a windows program that had to modify the network
stacks on both sides - clearly unacceptable for generic use. 

-- 
Jem Berkes
http://www.pc-tools.net/
Windows, Linux & UNIX software

Relevant Pages

  • Re: Direct connections through NAT/firewall
    ... | kernel or network stack tweaking required. ... | able to "break through" several kinds of NAT/firewalls - we've tried linux ... | I've seen so far was a windows program that had to modify the network ... | Windows, Linux & UNIX software ...
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