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3

A CNAME is not a redirect. When you use a CNAME, the traffic for both domains is sent to the same IP address. The behavior of the site that users see when you use a CNAME record is identical to what users see when you use an A record with the IP address of the other server. The type of DNS record you use has no bearing on how your site behaves. You can'...


1

As soon as you change your records, one recursive nameserver can query for it, and hence grab the "bad" value and then cache it, for either its TTL or the negative TTL depending on what is the record and the response exactly. If you did in fact really reload the nameservers with the bad value. Also, there are offline checker. named-checkzone for ...


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