[Apologies for duplicate emails.] Dear Colleagues, This message concerns people who have ns.ripe.net listed as a secondary DNS server for their reverse DNS zones. In order to improve the quality of our service, we are adding additional servers to our infrastructure. The effect of this change will be that we will perform zone transfers from more then one IP address within the ranges 193.0.0.0/22 and 2001:610:240::/48 as documented at: http://www.ripe.net/rs/reverse/reverse_howto.html On 4 November 2008 at 11:00 UTC, ns.ripe.net will move to a load-balanced solution. No noticeable downtime is expected. If you would like to make sure that we can properly transfer the zone from your server after the change, we recommend that you follow the following steps: - Increase the serial number in your zone's Start of Authority (SOA) record. - Wait for a zone transfer to be initiated from the 193.0.0.0/22 or the IPv6 address range. - Now you can compare the zone serials on your master server and ns.ripe.net. To compare the serials you can use tools like "dig", "drill" or "host -C" to query the SOA record and compare the serials on both servers. If you have any further questions about this message, please contact us at dns-help@ripe.net Regards, Sjoerd Oostdijck DNS Services RIPE NCC