Finally i got reverse resolving working on my named. But now the transfer doesnt work anymoe. And im not sure as to what i have to enter in the "reverse delegations" field on the subnet page. At first i entered an ipv6 only host and, if i remember correctly that worked ('dig @ns1.ipng.nl 0.0.0.2.4.1.1.8.e.f.f.3.ip6.int. AXFR' gave me a huge list of delegations). But i changed it to an ipv4 only host and the transfer doesnt work anymore. Does it matter what kind of host i enter there (ipv4/ipv6/4+6)?