I wonder why they did not reroute traffic for their targets directly. I assume the amount of traffic the Route53 servers get is quite a lot to handle and failur

I wonder why they did not reroute traffic for their targets directly. I assume the amount of traffic the Route53 servers get is quite a lot to handle and failure to do so would make a lot of people aware of some issue. Also, how is it possible to reach the original servers in order to forward non targeted lookups to them? Is it possible to have your own routes not affected by your own BGP announcements? Maybe they were able to do this by using EC2 internal DNS resolvers? Maybe Route53 does use individual IP addresses for the nameservers of registered domains? Or at least are using them hihgly segmented? I guess this would help to handle the amount of traffic quite a bit if so. Otherwise it seems inplausible that the mentioned site is the only target or that there was just a few targets because that should be easier to pull off. On the other hand i am not sure if these targets might share IP addresses with a large pool of websites and handling "only" authoritative DNS requests for them (and any other that happens to have the same IP addresses setup as nameserver) would be alot easier. How does Route53 handle delegation exactly? Would i have to handle all NS requests that happens to resolve to Route53 or just some specific set of domains? Only handling these delegation related NS requests might reduce the amount of traffic alot in any case. But maybe they setup glue records for registered domains. In this case the amount of traffic they would have to handle would be even larger and i guess disrupt quite alot of DNS clients because they would not be able to sign the zone properly. I also wonder why they were not able to issue a new valid certificate. This appears to be very easy even without any interruption at this stage. Especially this feels like it was only done in order to direct the attention away. Hopefully a more detailed writeup appears because this seems rather interesting.