Kind sirs: I'm stumped. First I tried connecting from Windows 7. That didn't work - possibly because Windows 7 creates a Taredo tunnel to Microsoft by default. Because the MS default IPv6 address for the Tarendo tunnel take up the address space my Hurricane IPv6# wants, I'd need to delete that address. Unfortunately I don't know how to do that and can't locate clear, step by step instructions for command line - or a gui tool to do the job for me. So I tried XP. I'm behind a DSL model (ATT ADSL w. Siemens 4100) and a router (DLINK DGL-4100). My LAN is behind the NAT in the DGL-4100 and I was unable to change my IP address for my Hurricane Tunnel to my lan-side address frm the DHCP server on my DGL-4100. That didn't work either. I tried troubleshooting why your server could't ping my LAN-side address and decided that Norton Antivirus is probably the culprit. My Windows Firewall is turned off by NAV and NAV doesn't give end users much discretionary control over adjusting NAV's firewall rules or creating exceptions. So unless you guys can help me figure out how to communicate successfully with your IPc6 server and DNA around my DSL modem and DGL-4100, I'm dead in the water. Here's my account information so you know who I am on your side: Logged in as Robert Louis Blomeyer Junior (RLBJ1-SIXXS) SSL IPv4 connection from 70.131.127.251 (My Speedstream 4100's ex. address) Tunnel Name My First Tunnel PoP Name uschi02 PoP Location Chicago, Illinois, United States United States PoP IPv4 216.14.98.22 TIC Server tic.sixxs.net (default in AICCU) Your Location Lisle Illinois, United States United States Your IPv4 AYIYA, currently 0.0.0.0 IPv6 Prefix 2001:4978:f:402::1/64 PoP IPv6 2001:4978:f:402::1 Your IPv6 2001:4978:f:402::2 Created 2010-01-07 16:37:02 CET State AYIYA (automatically enabled on the fly) uschi02 Location:Chicago, Illinois, United States United States (.us) Hostname:uschi02.sixxs.net Status:Up Heartbeat support:Yes AYIYA support:Yes tinc support:No Multicast support:No m6bone connected:No Active Tunnels:936 Active Subnets:351 Public:Yes Statistics:Latency/Loss, Traffic Issue Tracker:Issues? This PoP provides tunnels from the following prefixes: * 2001:4978:f::/48 of size /64 Subnets are allocated out of: * 2001:4978:100::/40 of size /48 * 2001:4978:200::/40 of size /48 I don't know what additional information you guys will want. But I'm pretty sure you'll want to know more about my side of the router. My initial attempts at using IPv6 employ wired connections, in an attempt to minimize additional complications from three wireless access points on my LAN. Various machines in on the LAN can boot XP SP3, Windows 7 Ultimate & Pro, and Ubuntu linux. One last thought... RIP is NOT activated on my DGL-4100. (Does it need to be?) My routing info is: Destination IP Netmask Gateway Metric Interface Creator 70.131.127.0 255.255.255.00.0.0.01WANSystem 0.0.0.00.0.0.0 70.131.127.25015 WANSystem 192.168.123.0 255.255.255.00.0.0.01LANSystem Get back to me with whatever else you need to know and I'll try to work through whatever it may be with you. Thanks for your patient consideration. Bob Blomeyer (BobBl) P.S. It would really be great if someone would publish a GNU or other Open Source tool or script to remove the default Teredo tunnel address from Windows 7 and set the address from IPv6 providers like yourselves (NOT MS) into the available Windows 7 IPv6 address space. Something like that would assist lots of new Windows 7 users to make the switch to IPv6 without unnecessary muss, fuss or bother.