Dear Sir/Madam IN Ripe NCC DNS WG Staff Hello,I hope you have fine time, We are one of your LIR and have two DNS server which work as primary & secondary.because of old hardware version of this server we deside to change primary server to new system without losing zonefiles which registred at dns manager and disconnecting of internet connection of our customer.we know that one way is create primary as a master and other system as slave and forward files to new system then converting new system to primary whith the same ip.but we intrest that is there new and easy way to transferring zone files from old system to new system?and if we have only master & slave configuration to rech the aim do you please lead us with step by step configutation to success prossessing.We deside change only system from nt 4. to new system with same IP address. Please advise us Thanks a lot The Best regards.