North American Network Operators Group
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Re: AOL rejecting mail from IP's w/o reverse DNS ?

  • From: Adam McKenna
  • Date: Thu Dec 04 20:16:21 2003 
On Thu, Dec 04, 2003 at 04:59:59PM -0800, Crist Clark wrote:
>   $ORIGIN 168.50.204.in-addr.arpa.
>   $GENERATE 0-15 $ NS a.ns.$
>   $GENERATE 0-15 a.ns.$ A 204.50.168.2
> 
> Is any harder than,
> 
>   $ORIGIN 168.50.204.in-addr.arpa.
>   $GENERATE 0-15 CNAME $.0/28
>   0/28		NS	ns.mydomain.org.

That's the whole point.  They are equivalent, but the former doesn't force 
you to invent your own naming scheme or use CNAMES (if using A records in
in-addr.arpa domains is distasteful, then imho using CNAMES is even more
distasteful, not to mention RR's containing the "/" character).

--Adam