Discuss October 2010

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256 participants
226 discussions

One server not showing SSH port, the other is.
by Dotan Cohen 13 Oct '10

13 Oct '10

I have two CentOS servers running SSH on two different non-standard ports. So far as I can tell, they have identical /etc/ssh/sshd_config files with the exception of the different port (both are 22xx). However, when running nmap on them, one betrays the port that SSH is running on, and the other does not. I have shut down iptables on both machines and the behaviour remains this way. What could be the cause? Specifically, how can I hide the port that SSH is running on? I'm sorry that I cannot provide the IP addresses, the owner of the servers doesn't want that! I also know how silly it is to do "stealth" ports but I'm not the one making the decision! Thanks! -- Dotan Cohen http://gibberish.co.il http://what-is-what.com

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mtrr error
by Shouben Zhou 13 Oct '10

13 Oct '10

I need your help and DEL's tech support doesn't provide any help on this one. We have a lot of different type of DELL desktops from old-type hyper-thread cpu, to dual-core and quad-core cpus (most are Xeons). We run all versions of CentOS, but most are latest 5.5 (also up-to-date) and are very happy about that. The primary software on those Linux systems is IDL, which uses OpenGL libraries usually comes with video drivers. Now we are having problem with DELL T3500 with six-core cpu (6 GB memory). This is the only T3500 and six-core cpu we have right now. Here is the fact: 1. on T3500 with six-core, CentOS5.5, video card ATI Profire 2260, IDL 7.1. Using dmesg, it report mtrr: type mismatch for e0000000,10000000 old: uncachable new: >>>>>>>>>> write-combining >>>>>>>>>> mtrr: type mismatch for e0000000,10000000 old: uncachable new: >>>>>>>>>> write-combining when run IDL with simple draw function, got segmentation fault /proc/mtrr: reg00: base=0xdff00000 (3583MB), size= 1MB: uncachable, count=1 reg01: base=0xe0000000 (3584MB), size= 512MB: uncachable, count=1 Then I switched another ATI RV370, the mtrr error is gone, but still got segmentation fault But 2. on T3400 with dual-core, CentOS5.5, same ATI RV370 video card and IDL 7.1, everything works just fine. By the way, we have never had any such problem with all our DELL boxes using CentOS and IDL on T3400, the /proc/mtrr: reg00: base=0x00000000 ( 0MB), size=65536MB: write-back, count=1 reg01: base=0x3ff00000 (1023MB), size= 1MB: uncachable, count=1 reg02: base=0x40000000 (1024MB), size=1024MB: uncachable, count=1 reg03: base=0x80000000 (2048MB), size=2048MB: uncachable, count=1 When googling, someone out there suggest manually configure the MTRR, can somebody help us how to configure this six-core's MTRR? I am guessing this must be MTRR related. Is it possible the current Linux kernel doesn't understand six-core very well? Thanks -- -- Shouben Zhou Science Systems and Applications Inc.(SSAI) 1 Enterprise Pkwy, Hampton, VA 23666 Tel: (757)951-1905 Fax: (757)951-1900 Email: Shouben.Zhou(a)nasa.gov

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SquashFS: how good is it?
by Boris Epstein 13 Oct '10

13 Oct '10

Hello listmates, Have any of you used SquashFS? See: http://en.wikipedia.org/wiki/SquashFS We have tried it on small file sets, seems good but if you have experience using it, especially to store/archive lage volumes of files, please share your experience. Thanks. Boris.

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security updates
by Ritika Garg 13 Oct '10

13 Oct '10

I can't understand exactly what these security updates do? Why is there a need to have a security update?

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using Linux as a front-end controller for a SAN?
by Rudi Ahlers 12 Oct '10

12 Oct '10

Hi all, I hope someone can shed some light on this for me. Has anyone tried, or have experience with, setting up a Linux server to manage a few NAS devices and thus make them all visible to the clients as one large SAN? Basically, I'm thinking it would be a good idea to combine the current NAS's we have into one large system (typically a SAN?) and then let the clients all connect to one server (for authentication, LUN control, etc), but then when they need to access their drives / devices / LUN's, they get redirected to the specific server directly. I'm also thinking it could be a good way to say some IP addresses, i.e. instead of giving each NAS a public IP, they could all have private IP's and then everyone just connects to the public IP if needed. The servers which will access the NAS's will be on the same physical LAN and will also be on the same private IP subnet to make it easier. Does anyone know what I'm talking about? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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SELinux policy for dkim-milter
by Ben McGinnes 12 Oct '10

12 Oct '10

Hello, Does anyone have a sample SELinux policy for dkim-milter? I'm using the configuration from this page: http://www.howtoforge.com/set-up-dkim-for-multiple-domains-on-postfix-with-… Along with the latest RPM from the link on that page. Regards, Ben -- Ben McGinnes http://www.adversary.org/ Twitter: benmcginnes Systems Administrator, Writer, ICT Consultant Encrypted email preferred - primary OpenPGP/GPG key: 0xA04AE313 http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x371AC5BFA04AE313

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CentOS-announce Digest, Vol 68, Issue 6
by centos-announce-request＠centos.org 12 Oct '10

12 Oct '10

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2010:0742 Moderate CentOS 5 i386 postgresql Update (Karanbir Singh) 2. CESA-2010:0742 Moderate CentOS 5 x86_64 postgresql Update (Karanbir Singh) 3. CEBA-2010:0716 CentOS 5 i386 conga Update (Karanbir Singh) 4. CEBA-2010:0716 CentOS 5 x86_64 conga Update (Karanbir Singh) ---------------------------------------------------------------------- Message: 1 Date: Mon, 11 Oct 2010 16:06:25 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2010:0742 Moderate CentOS 5 i386 postgresql Update To: centos-announce(a)centos.org Message-ID: <20101011160625.GA428(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2010:0742 Moderate Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0742.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: a2f087dd2963808a1b0001d6917ab5ee postgresql-8.1.22-1.el5_5.1.i386.rpm 412ae489675af469f079e34df10270c3 postgresql-contrib-8.1.22-1.el5_5.1.i386.rpm 02bc4a270543a089b45f8fbe5e607d36 postgresql-devel-8.1.22-1.el5_5.1.i386.rpm f4e475082cce5ec1a39d4a062c1a7e59 postgresql-docs-8.1.22-1.el5_5.1.i386.rpm 2fc002db451811bf3fe44b9e5e22811a postgresql-libs-8.1.22-1.el5_5.1.i386.rpm 9c32ef7a6cae292141a6221b5accb2d0 postgresql-pl-8.1.22-1.el5_5.1.i386.rpm 4667909e671f3b4a7bd73aa8a247a72a postgresql-python-8.1.22-1.el5_5.1.i386.rpm b8daa29c5082f871f8eeeb422ce6a631 postgresql-server-8.1.22-1.el5_5.1.i386.rpm d4edf5e0e060de8651927f4cf46023ea postgresql-tcl-8.1.22-1.el5_5.1.i386.rpm 026aa585667d56422f5feab3cfea4523 postgresql-test-8.1.22-1.el5_5.1.i386.rpm Source: 4a2a044075d02bcabcf8221189c3e48d postgresql-8.1.22-1.el5_5.1.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Mon, 11 Oct 2010 16:06:25 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2010:0742 Moderate CentOS 5 x86_64 postgresql Update To: centos-announce(a)centos.org Message-ID: <20101011160625.GA443(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2010:0742 Moderate Upstream details at : https://rhn.redhat.com/errata/RHSA-2010-0742.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: 0e1254a1eade7a996020c491a9952d35 postgresql-8.1.22-1.el5_5.1.x86_64.rpm b98d09b3352570c97471ad3cbc5f3644 postgresql-contrib-8.1.22-1.el5_5.1.x86_64.rpm 848a8db88a0d99f265796dfd97f6080b postgresql-devel-8.1.22-1.el5_5.1.i386.rpm 2c896cdd9703a590692833f119c12fae postgresql-devel-8.1.22-1.el5_5.1.x86_64.rpm 701935e781c34fb85c02f7e4359afd2a postgresql-docs-8.1.22-1.el5_5.1.x86_64.rpm 58ff60ee3cafcc94452c5ec2077073e9 postgresql-libs-8.1.22-1.el5_5.1.i386.rpm 937e99b9179c67ae898ddb884d03f0bf postgresql-libs-8.1.22-1.el5_5.1.x86_64.rpm 16e442754dfd2a993cc25c8907fe4349 postgresql-pl-8.1.22-1.el5_5.1.x86_64.rpm 4da4a7ed1586f30d5346dc68fd2840e4 postgresql-python-8.1.22-1.el5_5.1.x86_64.rpm 0df21282010775ed76e1c7aac8f25980 postgresql-server-8.1.22-1.el5_5.1.x86_64.rpm ab12ba6fbe351a0abb47102607123bd2 postgresql-tcl-8.1.22-1.el5_5.1.x86_64.rpm f97a5bd654e77623050a13fd1cc4a5c1 postgresql-test-8.1.22-1.el5_5.1.x86_64.rpm Source: 4a2a044075d02bcabcf8221189c3e48d postgresql-8.1.22-1.el5_5.1.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Mon, 11 Oct 2010 18:06:05 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CEBA-2010:0716 CentOS 5 i386 conga Update To: centos-announce(a)centos.org Message-ID: <20101011180605.GA1111(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2010:0716 Upstream details at : https://rhn.redhat.com/errata/RHBA-2010-0716.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: 093a78cb38f91231691bc8fdac6d8ed2 luci-0.12.2-12.el5.centos.4.i386.rpm 82f7cdf8a3782f771789bb6e58c4dedc ricci-0.12.2-12.el5.centos.4.i386.rpm Source: 79632debd088ae52b4eeb6dbd209120c conga-0.12.2-12.el5.centos.4.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 4 Date: Mon, 11 Oct 2010 18:06:05 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CEBA-2010:0716 CentOS 5 x86_64 conga Update To: centos-announce(a)centos.org Message-ID: <20101011180605.GA1126(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2010:0716 Upstream details at : https://rhn.redhat.com/errata/RHBA-2010-0716.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: 024f57483c6345cba1c26bcf5d4dfe4c luci-0.12.2-12.el5.centos.4.x86_64.rpm f1d5bc44539c931a86e961be71c7c603 ricci-0.12.2-12.el5.centos.4.x86_64.rpm Source: 79632debd088ae52b4eeb6dbd209120c conga-0.12.2-12.el5.centos.4.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 68, Issue 6 **********************************************

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Does anyone know where I can get an RPM of pyDB2?
by Kevin Thorpe 12 Oct '10

12 Oct '10

Sorry to be a pain but I'd really like PyDB2 (DB2 client for python). IBM only seem to offer the source which won't compile without a copy of DB2. I only need it to extract some info from a customer site so I don't really want to have to get DB2. any ideas? thanks

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Samba issue accessing shares by IP address
by Alfred von Campe 12 Oct '10

12 Oct '10

We have a strange issue with Samba shares on our CentOS 5.5 systems in that we can access the shares by name, but not by IP address. First a little background. Recently, our domain controllers were upgraded and I had to tweak the smb.conf file by changing security from DOMAIN to ADS and adding a setting for realm. My smb.conf file looks like this (names and IP addresses have been changed): [global] workgroup = OUR_DOMAIN printing = cups printcap name = cups printcap cache time = 750 cups options = raw map to guest = Bad User include = /etc/samba/dhcp.conf logon path = \\%L\profiles\.msprofile logon home = \\%L\%U\.9xprofile logon drive = P: usershare allow guests = Yes add machine script = /usr/sbin/useradd -c Machine -d /var/lib/nobody -s /bin/false %m$ domain logons = No domain master = No security = ADS encrypt passwords = Yes password server = server1 server2 username map = /etc/samba/smbusers usershare max shares = 100 passdb backend = smbpasswd wins support = No wins server = 1.2.3.4 name resolve order = lmhosts host wins log file = /var/log/samba/log.%m realm = COMPANY.COM [scratch] comment = Scratch area for builds inherit acls = Yes path = /scratch read only = No I also had to rejoin the CentOS systems to the domain by running "net ads join -U xxxxx" on each system. I can access the scratch share from any Windows PC in our domain without having to authenticate as long as I use the name of the CentOS system. But if I try to use the IP address of a CentOS system I get the "The network path was not found" error message. We have some systems in a lab from which we need to access the share by IP address. This worked before the recent changes, and I can't figure out which of these changes may have caused this. Any ideas? TIA for any help, Alfred

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yum update error
by Timothy Murphy 12 Oct '10

12 Oct '10

For some reason all the perl man pages cause yum errors like ------------------------------------- Transaction Check Error: file /usr/share/man/man1/c2ph.1.gz from install of perl-5.8.8-32.el5_5.2.x86_64 conflicts with file from package perl-5.8.8-32.el5_5.1.i386 ------------------------------------- 1. I don't really see how the man pages can cause conflicts; 2. More importantly, how should I deal with this? [I've updated everything else with yum --exclude=perl* update.] -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

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Discuss October 2010