Hi, Thank you for the video link. It solves my problem. "DNS-over-TLS Resolvers are available at RIPE 78 on a best-effort basis. They are available on TCP port 853, on the same IPv4 / IPv6 addresses as the regular DNS resolvers" lets me think about only regular resolvers. I didn't know or I forgot, DNS64 is provided based on the querying address by ACL. So I can test both features at the same time. @Colin Maybe you add the link https://ripe76.ripe.net/presentations/96-dns-over-tls-resolvers.pdf here https://ripe78.ripe.net/on-site/tech-info/dns-over-tls-resolvers/ @Gert I have no doubt that native IPv6 will work at RIPE, independent of the way IPv4 is added. In the worst case your are right, I can fetch my IPv4-access from m-net, lrz or Go6lab(JanZorz). Thomas