1) In Network settings -> Broadband, click modify VDSL
2) Select "IPV4 only" mode, which will give you the option to enable 6RD.
3) Enable 6RD and manually configure it with the information given on the wingo FAQ (
https://www.wingo.ch/fr... )
the IP address for 6rd.wingo.com is 178.238.168.250 (at least today, might change in the future)
I hope this works for you.
https://imgur.com/a...