[p2p-hackers] IPv6 and NAT

[Evan Tsang]

Even if you don't get a real IPv6 address, you can get a Teredo IPv6 address 
and communicate with other host with Teredo IPv6 address. You can still 
connected even if both side are NATed because Teredo tunnel their packets 
thru UDP and most of the consumer NAT device are not symmetric NAT. I have 
built a P2P client that communicate using this scheme in my previous 
company. A Teredo address has the prefix 3ffe:831f. You can obtain a Teredo 
address by running
> ipv6 install
> netsh interface ipv6 set teredo client

If Microsoft is willing to run a public Teredo relay or Teredo host-specific 
relay, you can communicate with IPv6 only host as well.

-
Evan Tsang

On 20 May 2005 03:18:32 -0000, larytet.8753341 at bloglines.com <
larytet.8753341 at bloglines.com> wrote:
> 
> "Given that l33t hackers are already giving owned machines ipv6 addresses
> anyway..."
> 
> i have IPv6 address on my machine. i am behind NAT and firewall
> and can do nothing besides testing between two PCs connected to the same 
> LAN.
> i understand that without tunnel in the NAT (static one to one) i can not
> do much with IPv6. am i right ?
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