From owner-freebsd-fs@freebsd.org Mon Aug 14 12:58:09 2017 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E922ADC56BF for ; Mon, 14 Aug 2017 12:58:09 +0000 (UTC) (envelope-from mike@sentex.net) Received: from smarthost2.sentex.ca (smarthost2.sentex.ca [205.211.164.50]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "smarthost.sentex.ca", Issuer "smarthost.sentex.ca" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 80B5D800B0 for ; Mon, 14 Aug 2017 12:58:09 +0000 (UTC) (envelope-from mike@sentex.net) Received: from lava.sentex.ca (lava.sentex.ca [IPv6:2607:f3e0:0:5::11]) by smarthost2.sentex.ca (8.15.2/8.15.2) with ESMTPS id v7ECvvNt040282 (version=TLSv1 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Mon, 14 Aug 2017 08:57:57 -0400 (EDT) (envelope-from mike@sentex.net) Received: from [192.168.43.26] (saphire3.sentex.net [192.168.43.26]) by lava.sentex.ca (8.15.2/8.15.2) with ESMTP id v7ECvtjU088996; Mon, 14 Aug 2017 08:57:55 -0400 (EDT) (envelope-from mike@sentex.net) Subject: Re: protecting zfs snapshot info To: Borja Marcos Cc: "freebsd-fs@freebsd.org" References: <52984307-2C6C-454C-A69B-15FB4AE01E1B@sarenet.es> From: Mike Tancsa Organization: Sentex Communications Message-ID: <5e3145ab-246a-f213-80b0-000dd801fbef@sentex.net> Date: Mon, 14 Aug 2017 08:57:54 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <52984307-2C6C-454C-A69B-15FB4AE01E1B@sarenet.es> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 Aug 2017 12:58:10 -0000 On 8/14/2017 2:47 AM, Borja Marcos wrote: > >> On 12 Aug 2017, at 19:14, Mike Tancsa wrote: >> >> >> Is there a way in zfs to protect non root users from seeing snapshots ? >> lets say a user makes a permissions mistake on a sensitive homedirectory >> on a Monday AM that is not discovered until the next day. If there are >> a whole mess of snapshots created between those two points in time, >> there is no way to protect that directory without deleting the snapshots. > > Good question and it’s a problem indeed. The .zfs directory is always created > and it can be hidden but it’s still accessible. It’s a security problem that prevents > an effective access revocation for a directory/file, I guess that’s what you mean. Yes, something like an extra option hidden | visible | unmounted ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/