Re: Question about DNS naming conventions

["John Levine" <johnl () iecc com>]

It appears that William Herrin <bill () herrin us> said:
> On Tue, Feb 11, 2025 at 9:13 AM Joel Sommers <jsommers () colgate edu> wrote:
> > What are some of the key use cases for having an A record (or AAAA for that matter) in which part or all of the 
> > address is embedded
> in the name?
>
> server = real DNS name
> random end user = DNS name which embeds the IP address
>
> The A record is meant to match the PTR record. The PTR record embeds
> the address typically as a signal that the address is not statically
> assigned to a particular use or user. ...

Right.  The names are usually created with BIND's $GENERATE extension or the
equivalent in other DNS software.

There is a great deal of variation in the details of the names beyond the fact
that they embed all or part of the IP address.  I know a guy who has collected
a lot of regular expressions to match them.  See http://enemieslist.com

R's,
John