On Tuesday November 17 2020 08:48, you wrote to Anna Christina Nass:
AN>> I don't know if that is even remotely possible for a private DTAG AN>> DSL connection...
RM> Yes ... definitely not doable with the DTAG IPv6.
Reverse DNS is not needed for binkp connections. (in "Tommi style") :-)
I get incoming IPv6 from about a dozen systems. Some addresses backresolve and some do not. In my SixXs/he.net time I never bothered to configure reverse DNS...