From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sa-prd-fep-042.btinternet.com (mailomta6-sa.btinternet.com [213.120.69.12]) by sourceware.org (Postfix) with ESMTPS id 212273840C04 for ; Thu, 14 May 2020 16:31:10 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 212273840C04 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=dronecode.org.uk Authentication-Results: sourceware.org; spf=none smtp.mailfrom=jon.turney@dronecode.org.uk Received: from sa-prd-rgout-001.btmx-prd.synchronoss.net ([10.2.38.4]) by sa-prd-fep-042.btinternet.com with ESMTP id <20200514163108.JCW1980.sa-prd-fep-042.btinternet.com@sa-prd-rgout-001.btmx-prd.synchronoss.net>; Thu, 14 May 2020 17:31:08 +0100 Authentication-Results: btinternet.com; auth=pass (PLAIN) smtp.auth=jonturney@btinternet.com X-Originating-IP: [31.51.205.116] X-OWM-Source-IP: 31.51.205.116 (GB) X-OWM-Env-Sender: jonturney@btinternet.com X-VadeSecure-score: verdict=clean score=0/300, class=clean X-RazorGate-Vade: gggruggvucftvghtrhhoucdtuddrgeduhedrleeigdelfecutefuodetggdotefrodftvfcurfhrohhfihhlvgemuceutffkvffkuffjvffgnffgvefqofdpqfgfvfenuceurghilhhouhhtmecufedtudenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhepuffvfhfhkffffgggjggtgfesthejredttdefjeenucfhrhhomheplfhonhcuvfhurhhnvgihuceojhhonhdrthhurhhnvgihsegurhhonhgvtghouggvrdhorhhgrdhukheqnecuggftrfgrthhtvghrnhepleeileeggedtgfegfeetudetgedtteegieelieetieeiueegvdelffeugfdvffetnecuffhomhgrihhnpegthihgfihinhdrtghomhdpghhithhhuhgsrdgtohhmpdhsohhurhgtvgifrghrvgdrohhrghenucfkphepfedurdehuddrvddthedrudduieenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhephhgvlhhopegludelvddrudeikedruddruddujegnpdhinhgvthepfedurdehuddrvddthedrudduiedpmhgrihhlfhhrohhmpeeojhhonhdrthhurhhnvgihsegurhhonhgvtghouggvrdhorhhgrdhukhequceuqfffjgepkeeukffvoffkoffgpdhrtghpthhtohepoegthhhkihhmvghssehgihhthhhusgdrtghomheqpdhrtghpthhtohepoegthihgfihinhestgihghifihhnrdgtohhmqe X-RazorGate-Vade-Verdict: clean 0 X-RazorGate-Vade-Classification: clean Received: from [192.168.1.117] (31.51.205.116) by sa-prd-rgout-001.btmx-prd.synchronoss.net (5.8.340) (authenticated as jonturney@btinternet.com) id 5E3A241110A87ABE; Thu, 14 May 2020 17:31:08 +0100 Subject: Re: www.cygwin.com DNS setup To: The Cygwin Mailing List References: Cc: Chad Kimes From: Jon Turney Message-ID: <97e93adb-4782-40bc-d33c-00c27ed56b74@dronecode.org.uk> Date: Thu, 14 May 2020 17:31:08 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-5.9 required=5.0 tests=BAYES_00, FORGED_SPF_HELO, KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, RCVD_IN_DNSWL_LOW, SPF_HELO_PASS, SPF_NONE, TXREP autolearn=no autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 May 2020 16:31:21 -0000 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 > > 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.