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you have to do it other way. www.example.com IN CNAME example.com This will create a subdomain com/example with an CNAME www that point to example.com Can you try this?


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A CNAME record defines that one name is an alias of another name (the canonical name). The implication of having an entire name be an alias is that it cannot also have records of its own, meaning you cannot have those MX records. This is also why you cannot have a CNAME record at the zone apex (where you will always need at least SOA and NS records). You ...


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If you want to run you own DNS Server, you can have a look at PowerDNS on Git. https://github.com/PowerDNS/pdns/tree/alias You need to build it yourself but in the "alias" Branch is their current implementation of ALIASRR and it works fine.


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Record type is inconsequential here. If the record needs to be changed frequently, it should have a very low TTL. If it doesn't need to be changed frequently, it stands to reason that it doesn't need a low TTL and you can use whatever you're comfortable with. Using the question that you linked to as an example, no one (other than Google) can really comment ...


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I agree. As long as the "real servers" have stable IP addresses the A records should have long TTLs. Keep the TTL on the CNAME records low to enable fast switching to another real server in case of failure or whatever.



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