Using IPv6 on your Tor relay
Tor has partial IPv6 support, and relay operators are encouraged to enable IPv6 alongside IPv4 when possible. However, Tor still requires an IPv4 address to run a relay.
Tor has partial support for IPv6 and we encourage every relay operator to enable IPv6 functionality in their torrc configuration files when IPv6 connectivity is available. Por el momento Tor requiere una dirección IPv4 en los repetidores, no puedes ejecutar un repetidor en un ordenador que solo disponga de direcciones IPv6.