Teredo tunneling interface doesn't work when on my home Wi-Fi. When running the "Netsh Int Teredo Show Stat" command on my computer, CMD returns two values that are a sign of trouble: State: probe (primary server) and after a little bit Error: primary teredo server unreachable over UDP. The problem is not in my computer because when i connect to a hotspot from my mobile data, Teredo works just fine. I tried "playing" with almost all settings on my router. I tried opening port forwarding for all the important ports. I tried disabling firewall, DoS protection and enabling DMZ at the same time. Nothing changed. The same problem always persisted. I also tried to hard reset my router - didn't work. The problem might be with my ISP but I hope the problem is solvable without having to talk with my ISP.

Thanks in advance for any tips.