>> And still can't get real answer about how reverse DNS works, if .ip6.int >> or .ip6.arpa is right domain, why two domains etc. >There's no domain like ip6.arpa. Use only ip6.int. ip6.int -> ip6.arpa transition is ongoing, therefore: - DNS zone admins should better supply both - clients should query both, ip6.arpa then ip6.int see RFC3152. itojun