[Swlug] DNS - do A & AAAA conflict with CNAME?

[steve at nexusuk.org]

On 08/08/14 13:58, Mark Summerfield wrote:

> Do A and AAAA DNS records conflict with CNAME records or is it OK to
> have both?

To my knowledge, CNAME can't coexist with any other record.

>     * 10800 IN CNAME ghs.googlehosted.com.
>     www 10800 IN CNAME ghs.googlehosted.com.

The "www" record is pretty redundant since * already points at the same
place.

> But unlike with digitalcardbox, GAE did not give me any CNAMEs to add,
> so I added the two shown above.
> 
> GAE did ask me to add 4 A and 4 AAAA records (the A's look like IPv4 and
> the AAAA a bit like IPv6 but I'm guessing), which I duly added.
> 
> My question is: will the CNAME records I added (and which GAE didn't ask
> me to add) conflict with the A and AAAA records, or is it safe to have
> them all?

My guess would be that they gave you A and AAAA records instead of
CNAMEs rather than as well as them.  Seems pretty odd to do this though,
given that there's essentially no way for them to change what IP
addresses are being used since all sorts of people will have DNS records
pointing directly at them!

-- 

 - Steve