[dns-operations] NS records pointing to names with CNAME records

Paul Vixie vixie at isc.org
Fri Jun 26 03:14:32 UTC 2009

> Date: 25 Jun 2009 20:48:50 +0100
> From: Chris Thompson <cet1 at cam.ac.uk>
> ...
> In a message to some of our college COs today, I referred to CNAME chains
> as "(slightly) deprecated". It's time out of mind since anyone reported
> them not working (if reasonably short).

they always work, whether short or not.  here's a live example.

;www.microsoft.com.             IN      A

www.microsoft.com.      3600    IN      CNAME   toggle.www.ms.akadns.net.
toggle.www.ms.akadns.net. 300   IN      CNAME   g.www.ms.akadns.net.
g.www.ms.akadns.net.    300     IN      CNAME   lb1.www.ms.akadns.net.
lb1.www.ms.akadns.net.  300     IN      A

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