From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id 76C8077B90 for ; Wed, 28 Apr 2021 18:34:04 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 74C0E11FA5 for ; Wed, 28 Apr 2021 18:34:04 +0200 (CEST) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS id A5E4F11F80 for ; Wed, 28 Apr 2021 18:34:02 +0200 (CEST) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 70A7E46497 for ; Wed, 28 Apr 2021 18:34:02 +0200 (CEST) Message-ID: Date: Wed, 28 Apr 2021 18:34:00 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:89.0) Gecko/20100101 Thunderbird/89.0 Content-Language: en-US To: Proxmox Backup Server development discussion , Dietmar Maurer , Wolfgang Bumiller References: <1707413265.1348.1619626228724@webmail.proxmox.com> From: Thomas Lamprecht In-Reply-To: <1707413265.1348.1619626228724@webmail.proxmox.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SPAM-LEVEL: Spam detection results: 0 AWL 0.006 Adjusted score from AWL reputation of From: address KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment NICE_REPLY_A -0.001 Looks like a legit reply (A) SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: Re: [pbs-devel] [PATCH v2 backup 02/27] add dns alias schema X-BeenThere: pbs-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox Backup Server development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Apr 2021 16:34:04 -0000 On 28.04.21 18:10, Dietmar Maurer wrote: > Seems DNS names in general are totally unrestricted and > may contain arbitrary binary data: > > https://tools.ietf.org/html/rfc2181#section-11 > > Only host names and url are restricted. > > ?! FYI, from a off-list message from Wolfgang: >> and why now only allow as first one? > mostly because that's what we did in PVE and because using underscores > anywhere else is silly ;-) > it's used for scoping, there was even an RFC draft but it's expired and only > marked as "best current practice" whatever that's worth: > https://tools.ietf.org/id/draft-ietf-dnsop-attrleaf-07.html#rfc.section.1.1 > so basically: we used to not allow underscores, people do use leading > underscores for scoping, and we use it particularly for ACME aliases... There was some confusion with which ALIAS you meant, as there's a not really used DNS record type named "ALIAS" too (which is unrelated to that one here).