I have set up teredo on my machine, and ipv6 sites work, also ipv6 test pages confirm that both my protocols are running. The trouble is that I'm running a few services, among which an FTP server, and they appear to be unreachable via my teredo IP. The servers support ipv6, I can connect to them using ::1 and my own adapter's address, but when I try this from another ipv6-capable machine, I get timed out. My teredo IP doesn't respond to ping and port 21 appears closed, at the same time all of this works fine through ipv4. I have tried disabling the firewall but that did not help. Is there something I don't understand about teredo?