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dhcpd proxy and/or windows autoupdates
by Dave 30 Jan '06

30 Jan '06

At one of our sites we have most outgoing ports blocked and everyone going through squid for web access. But it seems Windows autoupdate doesn't pick up the local users proxy settings so we ended up opening port 80 to some of the windows update servers. While searching around I found and option called custom-proxy-server but I don't see that setting in the man pages. Anyone have experience setting proxy server settings in dhcpd?

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Help - iSCSI and SAMBA?
by Scott Sharkey 30 Jan '06

30 Jan '06

Hi All, I have a client trying to us a Promise Tech iSCSI array to share 2.8TB via SAMBA. I have CentOS 4.2 with all updates installed on an IBM server. The installation and setup was pretty straightforward. The Promise box is using Gigabit Ethernet, and is the only device on that net (I think they are using a cross-over cable - I didn't set up the hardware). We're experiencing periodic "stoppages" with some of the Samba users on this server. Their Windows clients, which have drives mapped to the IBM server (which has the iSCSI partitions "mounted"), periodically "pause" for about 30-60 seconds. The machines are NOT locked up, as we can take screenshots, move the mouse, etc, but disk IO seems "stuck". When it happens, about anywhere from 3-12 people are affected (but not the other ~80 users). There are no network errors on either the iSCSI interfaces, or the switches and/or network interfaces. The kernel is not swapping (though the symptoms SEEM a lot like a process getting swapped to disk). The cpu usage is not spiking in correlation to the events, as far as we can tell. It DOES appear that the % of time the CPU is servicing IO requests is saturated, from iostat. I will paste the iostat info from one of the events below. Has anyone else seem such behavion, and/or do you have suggestions for troubleshooting or otherwise correcting it? Thanks. -Scott ------------------------------------------------------------------------ This was sent from one of the techs working the problem: I think I located the problem. Collecting iostat data during the last lockup yielded the following information. Time: 03:20:38 PM Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0.00 0.00 3.09 0.00 24.74 0.00 12.37 0.00 8.00 0.00 0.00 0.00 0.00 sdb 0.00 0.00 85.57 0.00 684.54 0.00 342.27 0.00 8.00 1.03 12.06 12.04 102.99 Time: 03:20:39 PM Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0.00 13.27 0.00 10.20 0.00 187.76 0.00 93.88 18.40 0.00 0.10 0.10 0.10 sdb 0.00 0.00 82.65 0.00 661.22 0.00 330.61 0.00 8.00 1.02 12.23 12.33 101.94 This clearly shows that the percent of CPU time used for I/O requests has reached the device saturation point which is 100%. The utilization was at or above 100% the entire time that the freeze occured. I am researching the issue now to see if this is something we can resolve with kernel tweaks or otherwise. Any input regarding the issue is appreciated, thanks.

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I guess hacker me - URGENT
by Adriano Frare 30 Jan '06

30 Jan '06

I use Centos 4.2 with all service pack installed. I verified traffic on link WEB and I see port TCP 80 with many traffic. I accessed lod /var/log/httpd/access_log and show below. ca.com/members/index.php HTTP/1.0" 401 - "http://members.sapphicerotica.com/members/index.php" "Mozilla/5.0 ( compatible; MSIE 5.01; Windows XP; NetCaptor )" 68.119.110.138 - - [30/Jan/2006:15:08:08 -0200] "GET http://211.115.101.253/config/login?.done=http://smallbusiness.yahoo.com/se… HTTP/1.0" 200 9794 "-" "-" 68.119.110.138 - - [30/Jan/2006:15:08:10 -0200] "GET http://211.115.101.253/config/login?.done=http://smallbusiness.yahoo.com/se… HTTP/1.0" 200 9786 "-" "-" 80.144.212.33 - - [30/Jan/2006:15:08:09 -0200] "GET http://www.995members.com/members/ HTTP/1.0" 401 472 "http://www.995members.com" "Mozilla/5.0 ( Windows; U; Windows NT5.1; DigiExt )" 68.119.110.138 - - [30/Jan/2006:15:08:10 -0200] "GET http://211.115.101.253/config/login?.done=http://smallbusiness.yahoo.com/se… HTTP/1.0" 200 9786 "-" "-" 68.119.110.138 - - [30/Jan/2006:15:08:12 -0200] "GET http://211.115.101.253/config/login?.done=http://smallbusiness.yahoo.com/se… HTTP/1.0" 200 9786 "-" "-" 68.119.110.138 - - [30/Jan/2006:15:08:13 -0200] "GET http://211.115.101.253/config/login?.done=http://smallbusiness.yahoo.com/se… HTTP/1.0" 200 9786 "-" "-" 68.119.110.138 - - [30/Jan/2006:15:08:14 -0200] "GET http://211.115.101.253/config/login?.done=http://smallbusiness.yahoo.com/se… HTTP/1.0" 200 9786 "-" "-" 68.119.110.138 - - [30/Jan/2006:15:08:16 -0200] "GET http://216.109.126.252/config/login?.done=http://smallbusiness.yahoo.com/se… HTTP/1.0" 999 4445 "-" "-" 68.119.110.138 - - [30/Jan/2006:15:08:17 -0200] "GET http://216.109.126.252/config/login?.done=http://smallbusiness.yahoo.com/se… HTTP/1.0" 999 4445 "-" "-" 68.119.110.138 - - [30/Jan/2006:15:08:18 -0200] "GET http://216.109.126.252/config/login?.done=http://smallbusiness.yahoo.com/se… HTTP/1.0" 999 4445 "-" "-" 82.39.175.52 - - [30/Jan/2006:15:08:35 -0200] "GET http://l1.login.dcn.yahoo.com/config/login?.redir_from=PROFILES?&.tries=1&.… HTTP/1.0" 502 961 "-" "-" 80.144.212.33 - - [30/Jan/2006:15:08:43 -0200] "GET http://www.995members.com/members/ HTTP/1.0" 401 472 "http://www.995members.com" "Mozilla/5.0 ( Windows; U; Windows NT5.1; DigiExt )" 12.206.3.132 - - [30/Jan/2006:15:08:46 -0200] "GET http://us.a1.yimg.com/login.bjs.yahoo.com/config/login?login=big_g_&passwd=… HTTP/1.0" 200 4440 "http://www.yahoo.com/" "-" 84.109.4.111 - - [30/Jan/2006:15:08:51 -0200] "CONNECT login.icq.com:443 HTTP/1.0" 200 - "-" "-" I guess that hacker is using my SERVR APACHE to PROXY. Please, I need help urgent. I stoped service HTTPD because it. Thanks Adriano

5 7

nfs export symlink
by Les Mikesell 30 Jan '06

30 Jan '06

Is there some official way to make an NFS export with a name that doesn't match the real path on the server? A symlink seems to work, but 'showmount -e' still shows the underlying paths. Is there a way that doesn't? -- Les Mikesell lesmikesell(a)gmail.com

1 0

unsuscribe
by Anthony Lordi 30 Jan '06

30 Jan '06

unsuscribe

2 1

RE: [CentOS] Creating my own YUM repository
by Bassett, Mark 30 Jan '06

30 Jan '06

If you want some more info... check here http://www.linuxshizzle.com/index.php?itemid=9 pop me a question if you have any ;) -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Leonard Isham Sent: Monday, January 30, 2006 10:30 AM To: CentOS mailing list Subject: Re: [CentOS] Creating my own YUM repository On 1/30/06, Robert Moskowitz <rgm(a)htt-consult.com> wrote: > I have already 6 Centos machines here and it is getting strange > having to pull down updates to each system. > > Seems like I should set up one system to pull updates and then all > other systems to point to it. > > How? > > Plus then I would want to add to this repository. > > Say that a number of my systems use tomcat which is only available > via rpm. I would like to be able to add it to my repository, and if > even manually, to keep it current. This way, when I build a new > system, after the build I would do a yum update (from my server), > then a yum install of all of the extras that particular system needs. > > Yam, available from DAG, would get you started faily easily increating an internal repository for yourself. I believe that there is a createrepo or repobuild for creating your customized repository for self created rpms or rpms that do nat reside in any repositiry. -- Leonard Isham, CISSP Ostendo non ostento. _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

1 0

Creating my own YUM repository
by Robert Moskowitz 30 Jan '06

30 Jan '06

I have already 6 Centos machines here and it is getting strange having to pull down updates to each system. Seems like I should set up one system to pull updates and then all other systems to point to it. How? Plus then I would want to add to this repository. Say that a number of my systems use tomcat which is only available via rpm. I would like to be able to add it to my repository, and if even manually, to keep it current. This way, when I build a new system, after the build I would do a yum update (from my server), then a yum install of all of the extras that particular system needs.

4 3

kernel panic after DDing disk to another one + question on LVM
by Kai Schaetzl 30 Jan '06

30 Jan '06

This is a machine in a remote datacenter, so I have no console access to it. The machine suddenly went offline, was reset remotely and showed several unrecoverable DMA errors when it came up. After a second normal reboot (to see if the problem was consistent) it lost several services and didn't come up after the third reboot. After contacting the datacenter the disk got replaced and the old image was DDed to the new disk. The new disk runs into a kernel panic now. I would expect this since the DD copies over the existing problems as well. I do not have any experience with LVM (which CentOS 4.2 uses by default, this is only my second test machine for CentOS and my only remote one), so I would like to ask if (besides the assumed reason) LVM could also cause this problem after cloning the disk to another one. I don't think so but I want to be sure. I have access to a (debian minimal) rescue system which doesn't have LVM, so I don't have access to most of the disk (other than /boot), so there's not much room for investigation. I plan to use the pxeboot kernel now to get it up and reinstall CentOS. My question is will I be able to do this or will the pxeboot kernel need to have access to that volume before I repartition? Also, can I disable using LVM (I think I don't need it and it may create more problems than it helps in my case) before setup starts or do I have to do this during setup (I assume I can do this during the manual partition phase?)? Thanks, Kai -- Kai Schätzl, Berlin, Germany

1 1

RE: [CentOS] Creating my own YUM repository
by Bassett, Mark 30 Jan '06

30 Jan '06

Use YAM from dag. Then set up a custom repository directory as well, that's exactly what we do :) http://dag.wieers.com/home-made/yam/ -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Robert Moskowitz Sent: Monday, January 30, 2006 10:13 AM To: CentOS mailing list Subject: [CentOS] Creating my own YUM repository I have already 6 Centos machines here and it is getting strange having to pull down updates to each system. Seems like I should set up one system to pull updates and then all other systems to point to it. How? Plus then I would want to add to this repository. Say that a number of my systems use tomcat which is only available via rpm. I would like to be able to add it to my repository, and if even manually, to keep it current. This way, when I build a new system, after the build I would do a yum update (from my server), then a yum install of all of the extras that particular system needs. _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

1 0

resuming FreeNX sessions
by Craig White 30 Jan '06

30 Jan '06

I've been running a FreeNX session for several days. During that time, I have occasionally lost the connect and when I re-establish the connection, it resumes where I left off and it was really nice. Tonight I lost the connection and when I reconnected, it started a new session but when I run NX Session Administrator application on the FreeNX server, it still shows the session as 'running'. I really want to re-connect to my other session as that has the editors and everything else running and I could terminate it and start over but I am wondering if there are any tricks that might be had to reconnect to an existing session (I can see the pid for both the current session and the session that I would like to connect for example...) Thanks Craig

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