Nice feature do examine... Win7 / Win2008

Redirect built into windows?


netsh interface portproxy add v4tov4 listenport=8080 connectaddress=10.1.1.1 connectport=8080 protocol=tcp
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Could it be used to redirect traffic?  probalbly ;)
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hxxp://ipv6int.net/systems/windows_xp-ipv6.html
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Basic IPv6 functions

Overview

I think on WinXP IPv6 is not active in a default installation. The IPv6 part has to be installed and activated manually on the command line:
netsh interface ipv6 install
Afterward IPv6 is active and ready to perform stateless autoconfiguration for local and global addresses.

Preference

Windows XP prefers IPv6 if a DNS query results in IPv4 and IPv6 addresses being sent back (A and AAAA RRs).

Privacy Extensions

Privacy addresses are enabled and used by default after the installtion of IPv6. They can be manually deactivated on the command line: netsh interface ipv6 set privacy disabled

Packet Filter/Firewall

Windows XP integrates since Service Pack 2 (SP2) a stateful IPv6 firewall into the base system firewall, called just Windows Firewall.

Tunnelling IPv4/IPv6

Configured tunnels

Windows XP supports configured tunnels with the integrated tunnel interface. Setting up a manual tunnel requires several steps on the command line.
Beforehand, you need the following information:

$host-ipv4

IPv4-address of the host

$router-ipv4

IPv4-address of the router/tunnel-server

$tunnel-v6host

(Tunnel) IPv6-address of the host

$tunnel-v6router

(Tunnel) IPv6-address of the router

Create the tunnel interface:
netsh interface ipv6 add v6v4tunnel "tunnel name" $host-ipv4 $router-ipv4


Add IPv6 address:
netsh interface ipv6 add address "tunnel name" $tunnel-v6host 


 Put IPv6 default route on the tunnel router:
netsh interface ipv6 add route ::/0 "tunnel name" $tunnel-v6router

6to4

When IPv6 is active and the system has a public IPv4 address, Windows XP automatically activates 6to4 if the interface does not have a global IPv6 address.


In our tests, the configuration of the public 6to4 anycast address was necessary:  
netsh interface ipv6 6to4 set relay 192.88.99.1

Other tunnels

As per the documentation, Windows XP SP2 supports several other tunnelling mechanisms:

• Automatic tunnels: Deactivated by default
• ISATAP: Activated by default
• 6over4: Deactivated by default
• Teredo: Deactivated by default
• PortProxy