X-Recipient: archive-cygwin AT delorie DOT com
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 784923858280
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1690859123;
	bh=x2c3aeMblKqO5h8VMGJS8QdLNsJOm0RYvJ3/8+6adt0=;
	h=In-Reply-To:References:Date:Subject:To:Cc:List-Id:
	 List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe:
	 From:Reply-To:From;
	b=r5+G/ooYWwnD9bdxg0k+K4x2syGQJyMAH89svS7/PvJfEPFCwjrr1588zTvynnToX
	 /3llRXvw0qkhnUw9f154hVQvnbzk5ux7fsoWx2FCnkZ9oWz9qXmB9MSla4IPHgDyrx
	 eGbOZA6mfBczwrkmgE0JrMTlDEeXBesCFZMwZjvU=
X-Original-To: cygwin AT cygwin DOT com
Delivered-To: cygwin AT cygwin DOT com
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 33DB23858D28
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20221208; t=1690859079; x=1691463879;
 h=cc:to:subject:message-id:date:from:references:in-reply-to
 :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id
 :reply-to;
 bh=x+C3YJHIr+UqgI/3YKw/RfzjoruSn60KEW+9aTZdorQ=;
 b=eZbzioO2NXLKTWmSS78I0lJfyh7DKoHqORLZ9ZZOOHe01xMK1no+v+my/4GCNyolll
 v791bDXRgzEuIUd0l5JOt5KgyB+ElH6O3MHKN4zP2a3ilsY0uHVq7DSrabcv8seCj6P5
 OLivPc5v72bCDp6/6QM4dR1P8nJVC4eNOzwqa0rsfcch8zIj6H9KEP79AJ//4VC9f0tu
 jdhziSy1lddh9xZ+WmnszMO2baFW2l/HkTD/DesGZuEfcHKmB3Qe+VT7NhiWYbFL1LG+
 4ckkA8Z71YQOzCEVsgrBlNbqJSmlE2MxPcPmwf84IHGTjkiiZwKFQwOAorrxnp1cL9lW
 P7cA==
X-Gm-Message-State: ABy/qLaKZQXygHNLaspLPz8FLeFAuUOn/7PM3JwK5eDAFAhJutYGJTse
 42ZG5FSjjjPDX8o7ZVu3JatmT9nObt4JprV0BaduD6Yz
X-Google-Smtp-Source: APBJJlGc7CdF5yy+CcA/v2Bzx/67fnrj4+3W+S/8KhGzWu/7gDgxx3tSLqLPMuNBfKCyhBAHOfnILuUOMQnJ82BGlnw=
X-Received: by 2002:a6b:f812:0:b0:783:6eef:1496 with SMTP id
 o18-20020a6bf812000000b007836eef1496mr10600996ioh.19.1690859079428; Mon, 31
 Jul 2023 20:04:39 -0700 (PDT)
MIME-Version: 1.0
In-Reply-To: <kd6aci1a9opmdck1mm0vktrjko28v1p1c2@4ax.com>
References: <6hi7cilufpjnc4u968imrl826rk0n88hsc AT 4ax DOT com>
 <DM8PR09MB709570C66D89E32220795D8FA506A AT DM8PR09MB7095 DOT namprd09 DOT prod DOT outlook DOT com>
 <88i8cipvg9pl02drkt31mja146eqfuo9l5 AT 4ax DOT com>
 <DM8PR09MB7095084F1983379F3AACF728A507A AT DM8PR09MB7095 DOT namprd09 DOT prod DOT outlook DOT com>
 <kd6aci1a9opmdck1mm0vktrjko28v1p1c2 AT 4ax DOT com>
Date: Mon, 31 Jul 2023 23:04:38 -0400
Message-ID: <CAD8GWstCFXTxdwOy52H68ZfLVKMebunh7c9c+19nP_5Tsqw9oA@mail.gmail.com>
Subject: Re: [EXTERNAL] dig and host don't work in IPv6
To: Andrew Schulman <schulman DOT andrew AT epa DOT gov>
Cc: cygwin AT cygwin DOT com
X-Spam-Status: No, score=-0.2 required=5.0 tests=BAYES_00, DKIM_SIGNED,
 DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_ENVFROM_END_DIGIT,
 FREEMAIL_FROM, KAM_NUMSUBJECT, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,
 SPF_PASS, TXREP,
 T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
 server2.sourceware.org
X-BeenThere: cygwin AT cygwin DOT com
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe: <https://cygwin.com/mailman/options/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive: <https://cygwin.com/pipermail/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe: <https://cygwin.com/mailman/listinfo/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From: Lee via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Lee <ler762 AT gmail DOT com>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Errors-To: cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com
Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>

On 7/29/23, Andrew Schulman via Cygwin <cygwin AT cygwin DOT com> wrote:
>> Sorry...  Did you try using the -d option to see what DNS servers these
>> commands try to actually connect to (and time out, eventually).
>
> No help unfortunately.
>
> $ host -d6 cygwin.com
> Trying "cygwin.com"
> ;; connection timed out; no servers could be reached

Have you tried the windows version of bind from isc.org?

I don't remember when ISC dropped (will drop?) support for windows,
but I've been using dig from the bind9.16.41 package for a while.  Not
that I use it all that much, but it works for me.. or at  least dig
does.  named on windows has something funky going on that I never
figured out, so I'm running named on Debian.

Get it here
https://ftp.isc.org/isc/bind9/9.16.41/BIND9.16.41.x64.zip

unzip and put that directory in your path
$ which dig
/cygdrive/c/Temp/BIND/dig

and have fun!
$ dig @2600:x:x:x::x:x www.google.com aaaa +short
2607:f8b0:4004:c09::67
2607:f8b0:4004:c09::69
2607:f8b0:4004:c09::93
2607:f8b0:4004:c09::63

Lee AT i3668 ~
$ dig @2600:x:x:x::x:x www.google.com a +short
172.253.122.147
172.253.122.103
172.253.122.99
172.253.122.104
172.253.122.105
172.253.122.106

ipv6 address hidden to protect the guilty :)

... hrmmm ... I just tried your "host -d6 cygwin.com" and got
$ host -d6 cygwin.com
Trying "cygwin.com"
;; connection timed out; no servers could be reached

Do you have a firewall blocking outbound udp/tcp to port 53?  I do,
which is most probably why I get the timeout.  But this works:
$ host cygwin.com 2600:x:x:x::x:x
Using domain server:
Name: 2600:x:x:202::x:x
Address: 2600:x:x:202::x:x#53
Aliases:

cygwin.com has address 8.43.85.97
cygwin.com mail is handled by 10 sourceware.org.


Maybe try using whatever dig you already have installed and do
  ipconfig /all | grep "DNS Server"
and then
  dig @<my dns server address> cygwin.com

Regards,
Lee


>
>> (strace can help as well, I think.)
>
> Posted at https://pastebin.com/XWwxJ41b. I'm not able to make much sense of
> it,
> except that on line 1339, I waited almost 5 seconds for sendmsg:
>
> 4964291 6958349 [isc-worker0000] host 20999 cygwin_sendmsg: 28 =
> sendmsg(20,
> 0x7FFDFC830, 0x0)
>
> Thanks for taking a look. I'm looking at other options in resolv.conf, but
> haven't found anything useful.
>
> I can't find any documention of the osquery option. This answer[1] says
> "res_init() uses the Windows resolver if either /etc/resolv.conf does not
> exist,
> or /etc/resolv.conf contains options osquery." Doesn't help in this case
> though.
>
> Andrew
>
> [1]
> https://stackoverflow.com/questions/10523828/how-does-gcc-cygwin-get-the-dns-server
>
>
> --
> Problem reports:      https://cygwin.com/problems.html
> FAQ:                  https://cygwin.com/faq/
> Documentation:        https://cygwin.com/docs.html
> Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple
>

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple