On Sat, Feb 20, 2016 at 11:35:50PM +0100, Gianluca D.Muscelli wrote: >I don't understand...dns server wors, only ptr doesn't work...any advice? There is none 3.127.43.212.in-addr.arpa delegation to your nameserver, yet. As a hint, please check this out: $ dig +norec ns 43.212.in-addr.arpa @ns3.nic.fr Regards, P.Y. Adi Prasaja