Hello,
my ORPORT is avalable for IP4 and IP6 and OR Addresses shows “IPv4,IPv6”. Selftesting for IP4 and IP6 is also fine.
Then i tried to setup obfs for IP4 and IP6:
ServerTransportPlugin obfs3,obfs4 exec /usr/bin/obfs4proxy
ServerTransportListenAddr obfs4 [xxxx:xxxx:xxxx:xxxx::1]:3785
ServerTransportListenAddr obfs3 [xxxx:xxxx:xxxx:xxxx::1]:3784
ServerTransportListenAddr obfs4 yyy.yyy.yyy.yyy:3785
ServerTransportListenAddr obfs3 yyy.yyy.yyy.yyy:3784
I tried the real external adresses and also [::] and 0.0.0.0.0.
In both cases in the notices.log
Registered server transport ‘obfs3’ at ‘[yyyy:yyyy:yyyy:yyyy::1]:3784’
Registered server transport ‘obfs4’ at ‘[yyyy:yyyy:yyyy:yyyy::1]:3785’
i can only find the IP6-Adresses and not the IP4. Why won’t the IP4 also reachable? I tried several writings e.g. IP4 and IP6 Adresse oder 0.0.0.0.0 / [::] in one line so only two ServerTransportListenAddr lines - but every time only the IP6 adress or [::] is shown in the notices.log.
I also have
BridgeRelay 1
BridgeDistribution moat
PublishServerDescriptor 1
in the torrc file and only for two days i had many visitors and on Relay Search the Bridge distribution mechanism <> [None].
The last days i only have very less traffic and distribution = None 
Any ideas?
Thank you.
Best regards
Michael