I like to run a obfs4-bridge, responding to ipv4 and ipv6. I have a setup that gives an error. I am sorry but I do not recall the exact error message. I do not dare to restart the bridge to often to reproduce the error. It is running with an average of 20Mbit/s, it might disturb TOR users. May be some can point out how to configure obfs4 for dual stack. This is my current torrc file. What should be changed or added.
# Ports shown here are not the true ports. I use privileged ports < 1024
# Any private information has been replaced by something I made up
# The comments after the lines will be removed before restarting the service
#
# Enable both IPv4 and IPv6 for the Tor client.
ClientUseIPv4 1
ClientUseIPv6 1
# Specify both the IPv4 and IPv6 addresses
Address 11.222.333.444 # IPv4 address of the external router
Address aaaa:bbbb:cccc:1:ddd:eeee:fffff:gggg # IPv6 address of the pc running the bridge
# Avoid port 9001 because it's commonly associated with Tor and censors may be scanning the Internet for this port.
ORPort 9003 # IPv4 and IPv6 ORPort
# Server transport plugin for obfs4.
ServerTransportPlugin obfs4 exec /usr/bin/obfs4proxy
# Specify the obfs4 listener ports for both IPv4 and IPv6.
ServerTransportListenAddr obfs4 0.0.0.0:9004 # IPv4
ServerTransportListenAddr obfs4 [::]:9004 # IPv6
# Local communication port between Tor and obfs4. Always set this to "auto".
ExtORPort auto
# Contact information for issues with your bridge (optional).
ContactInfo any@email.addr
# Pick a nickname for your bridge (optional).
Nickname beUncensored