Hi all, The officially adopted RFC for IPv6 reverse is RFC3596 old RFCs RFC 1886 said that the IPv6 reverse resolution suffix is ip6.int. [win2000dns server is compliant, I've not tried Win2k3] RFC 3152 said that the IPv6 reverse resolution suffix is ip6.arpa. [win2003dns server is compliant] current RFC RFC 3596 says that the IPv6 reverse resolution suffix is ip6.arpa. [only win2003dns server is compliant] # I've tried to create, in win2k DNS server, a reverse zone for IPv6 Actually, there is no support for ip6.int zones under the reverse resolution tree. So I've created a direct resolution .ip6.int zone and magically is disappeared from direct res. and is appeared under reverse res. tree... So I,ve tried to create a reverse zone for RFC3596 I've tried using the normal procedure (Create zone > Primary > ZoneName > New Zone File > failed! unable to create) and the file-driven procedure ((Create zone > Primary > ZoneName > Use that File > failed! unable to create) So, there are NO WAY to create a ip6.arpa zone in win2k dns server. # I hope that Microsoft will (immediately) ASAP patch the win2k dns server enabling RFC3596 support for ip6.arpa reverse resolution zones thanks Francesco