From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yuri Csapo Subject: Re: "spontaneous" permissions changes Date: Thu, 27 Aug 2009 14:25:21 -0600 Message-ID: <4A96EBB1.8000205@exchange.mines.edu> References: <4A95A44A.50305@exchange.mines.edu> <78B73E114B5F754087DF95C2C6B640531A4EB6C73E@MAILBOXCCR.monext.net> Reply-To: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------060302040206030801080709" Return-path: In-Reply-To: <78B73E114B5F754087DF95C2C6B640531A4EB6C73E@MAILBOXCCR.monext.net> Sender: linux-admin-owner@vger.kernel.org List-ID: To: Franck RICHARD Cc: Yuri Csapo , linux-admin --------------060302040206030801080709 Content-Type: text/plain; charset="iso-8859-1"; format="flowed" Content-Transfer-Encoding: quoted-printable Franck, that's a very good idea - I'll certainly check as soon as I can. Un= fortunately I just can't=20 umount right now. Maybe this weekend. Thanks --Yuri Franck RICHARD wrote: > If the permission change to 400 (read only), it's a security when the fil= esystem is corrupted, to protect it. >=20 > Do a check of your Filesystem, (umount, e2fsck, mount). >=20 > Maybe you can find something... >=20 >=20 >=20 >=20 > -----Message d'origine----- > De : linux-admin-owner@vger.kernel.org [mailto:linux-admin-owner@vger.ker= nel.org] De la part de Yuri Csapo > Envoy=E9 : mercredi 26 ao=FBt 2009 23:08 > =C0 : linux-admin > Objet : "spontaneous" permissions changes >=20 > Hi all, I have a strange situation I wish someone could help me with. Thi= s is the setup: >=20 > - Virtual machine running the latest VM under ESXi > - VM has one processor, 2 GB RAM, 1 GB swap > - Ubuntu 8.04 LTS > - The virtual host runs only this VM > - Virtual host connects to a Lefthand Networks (now HP) SAN through 1 GB = copper ethernet and iSCSI > - VM has a 1 TB volume from the SAN that looks like a SCSI drive to Linux= (/dev/sdc) > - sdc is formatted as one big ext3 partition (sdc1) > - sdc1 is exported both as an NFS resource and a SMB share (via Samba) > - Authentication is Kerberos and authorization is local, if that matters >=20 > The permissions on that partition's mount point, usually 755, changed sud= denly to 400. I have looked at sudo logs, root's and all admins' history fi= les and I can find no evidence of someone changing those permissions or of = tampering with the logs. >=20 > Physical access to the box requires the right keycard; logon (ssh) access= to the box is restricted to sysadmins and support personel only; the root = password is a 32 char long random string that lives in an encrypted reposit= ory on my iPod Touch. There are only 2 people, myself included, with full s= udo rights; there are another 5 people with sudo rights to a number of admi= nistration things including chmod. >=20 > This is a state university and it happened on the first day of classes. >=20 > My questions: >=20 > - Did I look everywhere I should be looking to find evidence of foul play? > - Does anyone know of anything in this setup that could trigger a seeming= ly spontaneous permissions change like that? >=20 > Thanks, >=20 > -- > Yuri Csapo > Academic Computing & Networking > Colorado School of Mines > CT-256 > Phone: (303) 273-3503 > Fax: (303) 273-3475 > Email: ycsapo@mines.edu >=20 > Please use the following link to open a service request: > http://helpdesk.mines.edu > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > With a PC, I always felt limited > by the software available. > On Unix, I am limited only by my knowledge. > --Peter J. Schoenster --=20 Yuri Csapo Academic Computing & Networking Colorado School of Mines CT-256 Phone: (303) 273-3503 Fax: (303) 273-3475 Email: ycsapo@mines.edu Please use the following link to open a service request: http://helpdesk.mines.edu =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D With a PC, I always felt limited by the software available. On Unix, I am limited only by my knowledge. --Peter J. Schoenster --------------060302040206030801080709 Content-Type: text/x-vcard; charset="utf-8"; name="ycsapo.vcf" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="ycsapo.vcf" begin:vcard fn:Yuri Csapo n:Csapo;Yuri org:Colorado School of Mines;CCIT email;internet:ycsapo@mines.edu title:System Administrator tel;work:(303) 273-3503 x-mozilla-html:FALSE version:2.1 end:vcard --------------060302040206030801080709--