On 4 May 2014 02:15, houguanghua <houguang...@hotmail.com> wrote: > These zones are not owned by ISP, such as: yahoo.com, facebook.com... > If such backup dns server is ready, ISP will talk to these WEB sites to keep > synchronization with their authority NSs. > It's maybe a huge project.
It's an impossible project. Exactly how are you going to handle DNS records that only have a 30 second TTL? Sites have TTLs that low to allow /them/ to cope with DR/failover scenarios. If you are keeping old DNS records past that TTL then when the site itself has changed to a different IP you are still going to be handing out the old IP address to your users. And equally the site may have a custom DNS implementation which gives you different IP addresses through round-robin/load balancing, how will you handle this? You will have no knowledge of their DNS infrastructure to determine how/what they are doing to return the correct records. Please go and read on how DNS actually works and use it properly instead of trying to invent a method which just wont work. You have no control over the Internet, so don't try to control it. Steve _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
