Hi all. I am using Windows 7 machine and I am testing ipv6 connectivity with other Windows 7 machines through Teredo protocol. I noticed that ipv6 is installed by default on this system and from address header I can conclude that ipv6 address on my machine is global. The problem arise when trying to ping other machine which also have global ipv6 address. I am getting a message: request timed out. I don't have third party firewall installed on my machine and I tried few things with windows firewall in order to enable echo request. I tried it manualy with command: netsh firewall set icmpsetting 8 enable and also through gui but I still cannot ping other machines successfully. I have nod32 antivirus installed, but even with disabled antivirus pinging also fails. Thanks

The brand of router is Pirelli. I got it from ISP. I didn't find it on Windows 7 compatibility list. I tried to ping machine with the same zoneID and it was done successfully. I also succeed to ping one XP machine with global address, but pinging in other direction (from XP to Win7) failed. On both machines echo request was enabled.