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Subject:	Re: www.cygwin.com DNS setup
To:	The Cygwin Mailing List <cygwin AT cygwin DOT com>
References:	<CABTKjsz75FkcPzEeKfZLB59O-j42jYXH2SqX1jDd-vxUoQDAmg AT mail DOT gmail DOT com>
From:	Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
Message-ID:	<97e93adb-4782-40bc-d33c-00c27ed56b74@dronecode.org.uk>
Date:	Thu, 14 May 2020 17:31:08 +0100
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Cc:	Chad Kimes <chkimes AT github DOT com>
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On 14/05/2020 16:54, Chad Kimes via Cygwin wrote:
> Hi all,
> 
> I'm investigating an issue with GitHub Actions runners having issues
> connecting to www.cygwin.com:
> https://github.com/actions/virtual-environments/issues/698
> 
> I worked with the Azure DNS team and in this comment
> <https://github.com/actions/virtual-environments/issues/698#issuecomment-628284472>
> I
> detail what we believe to be the likely issue. Summarized:
> 
> www.cygwin.com is CNAME'd to server2.sourceware.org
> server2.sourceware.org is an NS server for sourceware.org
> 
> We believe that the above configuration is triggering a bug in WinDNS that
> is causing intermittent DNS resolution failures. I don't have an ETA for
> resolution from the Azure DNS team, and internally I'm translating that to
> be on the order of months before we see a fix. In order to resolve this
> faster for customers, I'm reaching out to see what options we have for
> updating the DNS records that are triggering this bug.
> 
> Is there a change you can make to either www.cygwin.com or
> server2.sourceware.org DNS such that it doesn't have this recursive
> reference issue? Some options are to replace the CNAME with an A record, or
> to use something like ns2.sourceware.org for the NS record instead of
> server2.sourceware.org which is being used for cygwin's A record reference.

I have drawn the attention of sourceware overseers to this.

They have requested the DNS change you suggest.
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