On 6/27/2022 4:05 PM, John Levine wrote:
It appears that Peter Thomassen <[email protected]> said:
I am proposing to reserve all top-level underscore labels (_*) for special use.
Why?
While I don't think that reserving underscore names will break anything that is
not already broken, I also don't see what problem it solves.
I suggest that reserving "_*" names is redundant as (I *think* - I
didn't go looking for the reference?) strings beginning with an
underscore can only be used in left-most components of a DNS name.
Later, Mike
Everything you say about *.alt is true, and most people who squat on
random top level hostnames will continue to do so. But there is a
great deal of software that expects the names it uses to look like
hostnames, and won't work with anything else. The argument for *.alt
is that if ICANN sells another round of vanity TLDs, as seems
depressingly likely, here's a hostname we promise won't have new name
collisions.
Since it is hard to imagine ever adding a name that isn't a hostname
to the public root, all of the _names are in practice reserved anyway.
But I don't recall ever seeing anyone squatting on a name that isn't
a hostname. This should give us a hint.
R's,
John
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