Hallo Michiel,

 Mv> I see you use a he.net tunnel.
 Mv> I see your IPv4 address is from DTAG. DTAG provides native IPv6 to
 Mv> (some?) of its customers. There are two German Fidonet sysops that have
 Mv> native IPv6 from DTAG.
 Mv> You do not have native IPv6 from DTAG or is there another reason you use
 Mv> a he.net tunnel? 

Yep, this is my configuration :)

I chose this, as my DTAG DSL connection would indeed offer a Dual-Stack IP
connection, but the IPv6 prefix is not fixed and could change at any time -
kind of like the IPv4 address.
And thus I would need dynamic DNS not only for IPv4 but also for IPv6...
So I chose to stay with my he.net tunnel -- which also allows me to specify
reverse DNS servers.
I don't know if that is even remotely possible for a private DTAG DSL
connection...

Regards,
Anna

--- Mystic BBS v1.12 A46 2020/08/26 (Raspberry Pi/32)