CNAME only zone?

Barry Margolin barmar at
Sun Dec 11 06:59:28 UTC 2011

In article <mailman.510.1323563868.68562.bind-users at>,
 Ken Peng <shorttag at> wrote:

> 2011/12/11 Barry Margolin <barmar at>:
> >
> > If CloudFlare is similar to Akamai's solution, recursive servers never
> > see the CNAME record.  Instead, when the auth server receives the query
> > for the A record of the apex, it performs its own query for the CNAME,
> > and returns the result of this.
> >
> That hears interesting.
> But if the remote auth server for the CNAME has multi-views, and
> return different IPs based on the different clients, then this
> solution maybe not work as expected.

True.  Akamai generally only uses it for domains that point to their 
hosting/caching infrastructure.  The apex points to a server that sends 
an HTTP redirect to the www hostname, which is a real CNAME to Akamai's 
domain, so then their GLSB logic is invoked.

Barry Margolin
Arlington, MA

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