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Message-ID:	<b04c0d95-60e2-0e4b-f1d7-eaa8f62939e0@Shaw.ca>
Date:	Thu, 28 Sep 2023 11:48:48 -0600
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Subject:	Re: [EXTERNAL] Re: Cygwin/Win32 utility function to convert "raw"
	IPv6 address string into *.ipv6-literal.net string ?
To:	cygwin AT cygwin DOT com
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From:	Brian Inglis via Cygwin <cygwin AT cygwin DOT com>
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Cc:	Brian Inglis <Brian DOT Inglis AT Shaw DOT ca>
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On 2023-09-27 17:56, Lavrentiev, Anton (NIH/NLM/NCBI) [C] wrote:
>> $ host -t ptr \
>>	1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa
>> 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa domain name pointer localhost.

> I was talking about resolving the .ipv6-literal.net names via DNS.
> Such as "fe80--219-99ff-feae-73ce.ipv6-literal.net"

What do you think that output is - the PTR is resolved to "localhost."

I find *host* easier to use, script, and more tersely informative than the other 
bind DNS utilities: the bind-utils Cygwin package contains DNS utilities:

	delv
	dig
	host
	mdig
	named-rrchecker
	nslookup
	nsupdate

and the lookups support most of the same arguments and options, with different 
names and defaults: host defaults to -t A -t AAAA -t MX, but host and nslookup 
only accept a single type, while dig accepts -t ANY; delv and mdig will do deep 
dives for DNSSEC and DNS; while named-rrchecker validates DNS RR inputs.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

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