I use windows server 2003 SP2 and trying to configure teredo in utorent I find teredo state as offline.I have made the below configurations.While i renew the teredo using command "renew teredo" , the state changes are probe(cone) to probe(restricted) to offline.I have included an exception for port 3544 in windows firewall and utorrent Pl help.Let me know if any information is required netsh interface ipv6>show teredo state Teredo Parameters --------------------------------------------- Type : enterpriseclient Server Name : teredo.ipv6.microsoft.com Client Refresh Interval : 30 seconds Client Port : 50000 State : offline Error : secondary server address unreachable