On 25 Dec 2017, at 23:37, Stijn Jonker <sjcjonker@sjc.nl> wrote:

Hi Nusenu/Valters,

Thanks for the reply and links; what isn’t entirely clear is the following scenario. What if I provide IPv4 via NAT, and IPv6 for the relay, hiding the IPv4 address, possibly with the “NoAdvertise” on the IPv4 entries for those.

Reading the trac page I’m not sure whether this would work, as there will be no IPv4 inbound possible, only IPv4 outbound and IPv6 in and outbound.

This doesn't work for relays because of reachability checks.

It should works for bridges, but we broke it a few releases ago

by changing the descriptor checks, and never fixed it:

https://trac.torproject.org/projects/tor/ticket/4847

Additionally would it benefit the tor service or is it then only “show”? Sorry but that’s not entirely clear from what I can find published (and googling away).

It would be helpful to have a bridge with IPv6 inbound and

IPv4 outbound. But no-one has got around to fixing it yet.