Anyone Understand Kernel.shmall
Jul 26, 2009I checked this setting just now and it's set at
kernel.shmall = 4294967296
which comes out to 4GB, which is the installed amount of ram,
is that normal?
ADVERTISEMENT
Spam Header I Really Do Not Understand
Feb 13, 2008I have been in this industry for 4 years managing my servers alone. However, today I got a spam report that looks like something I have never seen before in my entire life.
Note: The spam is neither comming from an address on my server nor being sent to an address on my server... How is it using my IP then? I tried to check for open relays but found none... Do you have any idea what and how they are doing. None of the email addresses mentioned in the header are hosted on my server! Also the message ID does not appear in my log file:
MIME element (message/feedback-report)
Encapsulated message (message/rfc822)
Headers of embedded message (message/rfc822)
From fakesender@hotmail.com Wed Feb 13 02:37:08 2008
X-Apparently-To: recipient@yahoo.com via 209.191.91.172; Wed, 13 Feb 2008 02:44:39 -0800
X-Originating-IP: [MY.SERVERS.IP.ADDRESS]
Return-Path: < fakesender@hotmail.com>
Authentication-Results: mta139.mail.re4.yahoo.com from=hotmail.com; domainkeys=neutral (no sig)
Received: from MY.SERVERS.IP.ADDRESS (HELO my.servers.hostname) (MY.SERVERS.IP.ADDRESS)
by mta139.mail.re4.yahoo.com with SMTP; Wed, 13 Feb 2008 02:42:56 -0800
Received: from sdcbc (112.23.180.123)
by my.servers.hostname; Wed, 13 Feb 2008 04:37:08 -0600
Message-ID: < 006e01c4df02$fc9cb4e8$c7eb8875@sdcbc>
Reply-To: < someaddress@bellsouth.net>
From: < fakesender@hotmail.com>
To: < recipient@yahoo.com>
Subject: =?koi8-r?B?Qm9vc3QgeW91ciBzZXh1YWwg?=
=?koi8-r?B?cG93ZXIgbm93IQ==?=
Date: Wed, 13 Feb 2008 04:37:08 -0600
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary=" ----=_NextPart_000_006F_01C48875.C7EBB4E8"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
Content-Length: 777
Network Down/up- I Can't Understand This Message
Mar 28, 2007Hello, if anyone is familiar with network technical jargon, I would greatly appreciate a translation. I cannot access my server/site or my datacenter's website.
I checked my regular site monitor and it said both sites were up. However when I checked another online monitor I received the following message:
"Got an error when connecting to ns2.ochiba.net/64.235.53.39 with a request for ochiba.net/ANY: Socket Timeout Exception: Socket timeout on name server ns2.ochiba.net. null"
Here is the ping information:[url]
My site is ochiba.net.
I have no clue what this means. Is this a network issue? DNS issue? Is it on my end (I don't think this is the case because my datacenter's site is down as well)? My datacenter's end? Any recommendations on what steps I should take to resolve this?
I've been unable to access my server now for 20 minutes, so any help would be greatly appreciated (even if it is to point me in the direction of an appropriate google search)
Cpanel Error :: Unable To Understand Response From Admin Bin: Reseller Sent
Aug 17, 2008I am getting following error after to login to my Cpanel, Please advice me the
solution. thanks is advance.
========================================================
Unable to understand response from admin bin: reseller sent: RESELLERSUSERS root received:[]: Illegal seek at /usr/local/cpanel/Cpanel/AdminBin.pm line 140.
Cpanel::AdminBin::adminfetch('reseller', 'ARRAY(0x9f77224)', 'RESELLERSUSERS', 'storable', 'root') called at /usr/local/cpanel/Cpanel/Resellers.pm line 36
Cpanel::Resellers::Resellers_accountlistopt() called at /usr/local/cpanel/Cpanel/RvresellersC.pm line 63
Cpanel::RvresellersC::RvresellersC_accountlistopt() called at (eval 84) line 1
eval 'Cpanel::RvresellersC::RvresellersC_accountlistopt(@{$argref});' called at cpanel.pl line 1648
main::exectag('<cpanel RvresellersC="accountlistopt()">') called at cpanel.pl line 4797
main::dotag(undef) called at cpanel.pl line 4664
main::cpanel_parseblock('SCALAR(0x90e7c8c)') called at cpanel.pl line 4616
main::cpanel_parse('GLOB(0x93b4f40)') called at cpanel.pl line 2912
main::doinclude('rvbranding/newssessionLayout.html', 2) called at cpanel.pl line 1673
main::exectag('<cpanel relinclude="rvbranding/newssessionLayout.html">') called at cpanel.pl line 4797
main::dotag(undef) called at cpanel.pl line 4664
main::cpanel_parseblock('SCALAR(0x90fdeb0)') called at cpanel.pl line 4616
main::cpanel_parse('GLOB(0x9388638)') called at cpanel.pl line 1309
========================================================
Plesk 12.x / Windows :: High Cpu Usage And Methods To Understand What Website Is Involved
Jul 15, 2015from about 3-4 days, the cpu of my server, from an average of 0-15% load, grew up to a constant 80-90-100% cpu load.
There were two processes called php-cgi.exe IWAM_PLESK(default) that, each one, constantly burned 30-40% of cpu load.
So, stopping websites one by one, I found the website that was the cause of the cpu overload.
On my "old" windows vps, there were processes called with the name of the website hosted (for example websitename_web.exe), so it was easy to immediately find exactly what website was involved in the hypotetical cpu or ram overload issue.
IWeb Technical Support Reps And System Admins Dont Understand Basic TCP-IP Networking
Aug 22, 2008I want to pass on a warning before anyone goes with iWEB. I just ordered a $269 a month dedicated server so I could run vmware on it for my own virtual machines that I need.
With this server I got 7 IPs.
The primary IP they assigned me is say for example: 70.xx.15.171 with a GW of 70.xx.15.161. The secondary ips they issue me are 70.xx.18.249-254. So these are on a completly different subnets.
After talking on the phone to several differnt people including tech support who tells me this will work jsut fine useing thoes secondary ips on my VMs and to not put a gateway address. I talk to my account manager he says to open a ticket that he will forward to their system admins.
This is the ticket I opened.
I just got a new server set up CL-T113-140CL. It was
assigned the primary ip of 70.xx.15.171 with a GW of 70.xx.15.161. My
secondary ips are 70.xx.18.249-254. The server we got from you is a
VMWare host. We need to use the secondary IPs for the Guest VMs. How
ever the primary and secondary IPS are on different subnets and so
the VMs useing the IPs 70.xx.18.249-254 can not talk to the gateway.
I need to have a gateway server IP to use for my VMs.
Please either give me a valid GW address for the 70.38.19.x subnet or
assign new secondary IPs on teh 70.xx.15.x subnet with a SM that can
talk to the 70.xx.15.161 GW assigned.
this is the reply I get back from their system adminstrator
The gateway to be used for your secondary IP addresses is the same as
the one for your primary. You should not have anything to change,
gateway-wise. Just leave the current one as default gateway and
everything should work just fine.
If there is anything please do not hesitate to contact us.
Regards,
--
=================================================
Jean-Francois Doucet [iWeb]
System Administrator / Administrateur Système
Support / Client Hub : [url]
[url]
=================================================
Are they brain dead at iWEB? DO they understand basic TCP-IP networking at all?
Here is my last reply. I tried to make it real simple for them to understand.
This does not address the issues. Do you even know what a virtual
machine is? It is a virtual computer running on the host computer.
The host computer has a valid ip address of 70.xx.15.171, sm:
255.255.255.224 gw: 70.xx.15.161. The virtual machines (or guest
operating systems) if I assign it the IP address of 70.xx.18.249 SM:
255.255.255.248 with no gateway it is physically impossible for it to
reach the gateway of the host pc 70.xx.15.161. You have to understand
the Virtual Machine operates as a completely separate computer. It
requires its own gateway. with no gateway specified it has no way to
get out of its local subnet to get to the 70.xx.15.x subnet. What
happens if you put two physical computers on one hub. The computer on
port 1 of the hub has the IP info 70.xx.15.171 SM: 255.255.255.224 GW
70.xx.15.161. The second computer is on port 2. It has the ip info
of: 70.xx.18.249 SM: 255.255.255.248 GW: NONE.
How is the pc on port 2 going to communicate with the pc on port
1? This is the exact situation we are in. There has to be a
gateway to route the IP traffic from pc2 to pc1 to get onto the
internet.
[kernel: Kernel BUG At Mm/rmap.c:479] Any Idea What This Is?
Mar 29, 2007we have one box in hivelocity.net that has been down so many times this month that we were forced to remove links to siteuptime where we were once so proud of having a 99.7% uptime for 3 years in theplanet.
syslog shows that just before crashing, these entries were made:
kernel: kernel BUG at mm/rmap.c:479
kernel: invalid operand:0000 [#1]
dmesg also shows this:
...
Brought up 2 CPUs
zapping low mappings.
checking if image is initramfs... it is
Freeing initrd memory: 482k freed
NET: Registered protocol family 16
PCI: PCI BIOS revision 2.10 entry at 0xf9f20, last bus=1
PCI: Using configuration type 1
mtrr: v2.0 (20020519)
mtrr: your CPUs had inconsistent fixed MTRR settings
mtrr: probably your BIOS does not setup all CPUs.
mtrr: corrected configuration.
...
i've googled these messages and they point to ram problems.
hivelocity.net claims to have done diagnostics on the box and that there were no problems reported.
they said this is a result of a sys configuration problem made by us.
any ideas?
Kernel Headers For Virtuozzo Kernel
May 20, 2009running centos/virtuozzo 2.6.18-028stab062.3
when i configure vmware it asks at one point for kernel header files. where would i find them to match the current kernel?
i asked at parallels forums but help there is very scarce. i checked openVZ repositories and they dont yet have headers for this version.
what are my options? i have one last windows machine left and want to run it in VMware.
Centos + Kernel 2.6.9-34.0.2- How To Upgrade Kernel
Apr 29, 2007Last year I ordered a new server with Centos 4.3 and it had the kernel kernel 2.6.9-34.0.2ELsmp installed. It runned fine and I didn't update any packages since then.
Today I started getting a problem where both mysqld and kswapd0 uses very high amounts of CPU, spiking up to 100% and my memory usage is at 99% all the time. The problem seems exactly the same as the one mentioned in this thread.
In that thread the exact same kernel is said to be insecure and to cause this problem. I also came across a centOS bug that reports this problem with high cpu, mem usage and mysql & kswapd0 consuming all resources.
In the linked thread the person solved the problem by upgrading to kernel 2.6.9-42 using rpms but others recommended a newer kernel or a custom compiled kernel for CentOS.
Apparently when they used yum it said 34.0.2 was the latest kernel.
What should I do to upgrade the kernel, which version should i upgrade to, and where do I get it from? I won't be able to compile a custom kernel and I've only installed basic rpm packages before.
Kernel Source Install Help Needed On Fc6 X64I Am Trying To Install The Kernel Source.
May 13, 2007I am trying to install the kernel source.
I have downloaded kernel-2.6.20-1.2948.fc6.src.rpm
I am using fedora 6 64bit.
here are my current kernels:
kernel-headers-2.6.20-1.2948.fc6
kernel-devel-2.6.20-1.2944.fc6
yum-kernel-module-1.0.3-1.fc6
kernel-2.6.20-1.2944.fc6
kernel-devel-2.6.20-1.2948.fc6
kernel-2.6.20-1.2948.fc6
here is what I seen when I installed kernel-2.6.20-1.2948.fc6.src.rpm
rpm -ivh kernel-2.6.20-1.2948.fc6.src.rpm
1:kernel warning: user brewbuilder does not exist - using root
warning: group brewbuilder does not exist - using root
warning: user brewbuilder does not exist - using root
########################################### [100%]
warning: user brewbuilder does not exist - using root
warning: group brewbuilder does not exist - using root
then when I ran:
rpmbuild -bp --target=$(uname -m) /usr/src/redhat/SPECS/kernel-2.6.spec
I seen this error:
+ Arch=x86_64
+ make ARCH=x86_64 nonint_oldconfig
In file included from /usr/include/sys/socket.h:35,
from /usr/include/netinet/in.h:24,
from /usr/include/arpa/inet.h:23,
from scripts/basic/fixdep.c:117:
/usr/include/bits/socket.h:310:24: error: asm/socket.h: No such file or directory
make[1]: *** [scripts/basic/fixdep] Error 1
make: *** [scripts_basic] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.93770 (%prep)
I need to have this installed to get a app installed etc...
suggestions or ideas?
thanks
Xen Kernel
Apr 4, 2009I have a Xen VPS. I started with a Debian 4 image and have since upgraded to Debian 5. Firstly was this advisable? Secondly what Kernel version should I be running, or rather is it set by my installation or by the Xen server?
View 3 Replies View RelatedNew Kernel 2.6
Feb 15, 2007Does it take 2 hours to have a new kernel up and running? The tech is taking forever to finish.
View 11 Replies View RelatedKernel Tuning
Apr 24, 2009as part of a project I have lately been looking into various aspects of kernel tuning. Most notably lately tuning the TCP stack for more efficient memory usage/throughput.
Thought I would start this thread to mention some of the tools I'd found for doing testing and see what anyone else had to recommend.
So far my favorite of the bunch is nuttcp. Its easy to use and gives a very good idea of how much of your bandwidth you are able to utilize.
A few interesting web pages are as follows for anyone interested in the topic:
[url]- Tuning TCP for High Bandwidth Delay networks
[url]- TCP Tuning Cook book, some interesting information in there as well
[url]...formanceTuning - Performance Tuning TWiki. Has a list of useful tools, flags for existing tools and ways to monitor network performance from a system level, along with some suggestions of things to correct
Kernel Drives
Aug 4, 2009What is the best way to find out which filesystems and harddrive drivers you can remove? Obviously, i need ext2,3 but how do you find which HD you only need?
View 1 Replies View RelatedKernel: Ata1.00
Jun 15, 2009recently,my dedicated server down frequently,
i can not find any important info from /var/log/messages
but i find some records many time on it,those like
----------------------------------
Jun 15 05:30:40 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:40 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:40 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:40 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:40 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:40 server kernel: ata1: EH complete
Jun 15 05:30:42 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:42 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:42 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:42 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:42 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:42 server kernel: ata1: EH complete
Jun 15 05:30:44 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:51 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:51 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:51 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:51 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:51 server kernel: ata1: EH complete
Jun 15 05:30:51 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:51 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:51 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:51 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:51 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:51 server kernel: ata1: EH complete
Jun 15 05:30:51 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:51 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:51 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:51 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:51 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:52 server kernel: ata1: EH complete
Jun 15 05:31:26 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:31:30 server kernel: sd 0:0:0:0: SCSI error: return code = 0x08000002
Jun 15 05:31:33 server kernel: sda: Current [descriptor]: sense key: Medium Error
Jun 15 05:31:36 server kernel: Add. Sense: Unrecovered read error - auto reallocate failed
Jun 15 05:31:36 server kernel:
Jun 15 05:31:39 server kernel: Descriptor sense data with sense descriptors (in hex):
Jun 15 05:31:46 server kernel: 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
Jun 15 05:31:51 server kernel: 2c d2 23 42
Jun 15 05:31:56 server kernel: end_request: I/O error, dev sda, sector 751969090
Jun 15 05:31:57 server kernel: ata1: EH complete
Jun 15 05:31:57 server kernel: SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
Jun 15 05:31:58 server kernel: sda: Write Protect is off
Jun 15 05:31:58 server kernel: SCSI device sda: drive cache: write back
Jun 15 05:31:59 server kernel: SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
Jun 15 05:32:03 server kernel: sda: Write Protect is off
Jun 15 05:32:04 server kernel: SCSI device sda: drive cache: write back
-------------------
is it safe ? or any hardware error?
How Update Kernel
Jul 7, 2009can i upgrade my kernel?
yum cant find any new update but my kernel version is 2.6.18-128.1.1.el5.028stab062.3PAE
Kernel Update With Yum
Jun 13, 2009I have following error in kernel update with yum:
Downloading Packages:
Running rpm_check_debug
ERROR with rpm_check_debug vs depsolve:
Package kernel conflicts with ecryptfs-utils < 44.
Complete!
So kernel not updated yet.
Kernel Compile
Jun 20, 2009I copied the default config file and renamed it as .config but I get this:
Code:
WARNING: No module dm-mem-cache found for kernel 2.6.27.10-grsec, continuing anyway
WARNING: No module dm-region_hash found for kernel 2.6.27.10-grsec, continuing anyway
WARNING: No module dm-message found for kernel 2.6.27.10-grsec, continuing anyway
WARNING: No module dm-raid45 found for kernel 2.6.27.10-grsec, continuing anyway
Which Kernel To Upgrade?
Jul 20, 2009My current kernel version is "2.6.9-42.0.10.ELsmp #1 SMP Fri Feb 16 17:17:21 EST 2007 i686 athlon i386 GNU/Linux". I want it to be upgraded since it is old. I have been told by our server management company that the latest kernel distributed from yum is kernel.i686 0:2.6.9-78.0.22.E. Can anyone tell me if this version is safe and secure enough? It is a CentOS release 4.7 (Final) server with cPanel installed.
View 2 Replies View RelatedYum Install Kernel-PAE
Aug 1, 2009i have a dedicated server with Centos 5.2 32bit.
my cpu is 64bit but for some software, datacenter install 32bit for me.
i need more ram and order to datacenter, before my ram was 4 Gig and now my ram is 6 gig . but cpu just use 3 gig of ram.
i install kernel-PAE with "yum install kernel-PAE " command and my ram down to 2.5 Gig. now my server used just 2.5 gig of ram.
i can not reformat server because of i have some vps in this server ( Xen vps )
2 Kernel Compile
Jul 12, 2009when doing 2.6.26+ or w/e it is, how do you enable conntrack, what options do i need to enable under make menuconfig?
net.netfilter.nf_conntrack_acct = 1
net.netfilter.nf_conntrack_generic_timeout = 120
error: "net.netfilter.nf_conntrack_icmp_timeout" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_close" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_time_wait" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_last_ack" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_close_wait" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_fin_wait" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_established" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_syn_recv" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_syn_sent" is an unknown key
error: "net.netfilter.nf_conntrack_udp_timeout" is an unknown key
error: "net.netfilter.nf_conntrack_udp_timeout_stream" is an unknown key
net.netfilter.nf_conntrack_max = 262144
and how do i know which hardware/devices that i can remove?
Troubleshooting Kernel
Jul 24, 2009I have a FreeBSD server crashing a few times per week sometimes 2 or 3 times in one day, then 3 days fine sometimes each other day...
/var/log/messages shows nothing related to the reboot when looking at the server screen after a crash, it showed kernel panic
any ideas on how to troubleshoot that with the minimum downtime possible? DC already tried swapping memory, but it didn't solve
How To Upgrade Kernel
May 12, 2008I am using centos 4.6 on 2.6.9-67smp kernel
I need to update the kernel to 2.6.25.3
is that possible ?
Kernel Compiling
Dec 24, 2008I've never actually compiled a kernel before, and wanted to know the basics when it comes to compiling for a standard CPanel/Centos 32bit system.
View 10 Replies View RelatedGrub And Kernel
Jul 9, 2008i compiled my kernel and i have problem.. i dont have lilo on my server so i dont know how to change the grub.conf file to boot my new kernel..
View 7 Replies View RelatedKernel Exploit
Jun 28, 2008How Can i translate An Kernel Exploit to secure my server like that
[url]
how can i now what i do to my server if i see any exploit
Compiling RHE 5 Kernel
Apr 26, 2008I have always used RPM kernels from the RedHat Network, in this time I need to compile an SMP kernel in a server that is used to serve common webhosting traffic (web, ftp, email, etc) with cPanel.
I have compiled kernels from source in desktops stations, but never in remote servers.. do you have any recommendations to do this at a Dual Xeon 3.2 RHE 5 + cPanel server? Oh.. almost forgot.. I will also compile it with GRsecurity.
Should I use a src kernel from RedHat, or a kernel.org latest kernel?
Kernel Update
May 8, 2008I installed CentOS 5 on a server with 2 quad core CPU's and 4GB of RAM. After the installation is done and during boot I see a warning that says "Warning only 3GB will be used".
So, just to check, I installed CentOS 4.4 and it sees all 4GB of RAM.
Are there any memory limitations on the distro? or could it be that the desktop kernels made their way into the iso's from upstream?
Recompiling Kernel
Feb 20, 2008I am recompiling the kernel with the src rpm. I haven't been able to get any kernel to boot properly since i got this server.
I really could use some help, below i posted lspci, lsmod and cat interrupts. What I really need help with is which kernel modules are necessary for my server.
lspci: [url]
lsmod: [url]
interrupts: [url]
I have already tried a kernel with ext3, and sata support compiled in but it never boots.
Are You Using A Patched Kernel
Mar 21, 2008For everyone out there who have dedicated servers with linux kernel, do you use a kernel patch like GrSecurity for extra security and piece of mind or not and why?
I am using mostly VPS with huge resources for hosting sites because I didn't have the budget for Raid 5, Data Redundancy and managed servers. But now I just leased my first Dedicated running Centos (for better compatibility with CPanel) and I am concerned about the kernel's security issues.
I am using Grsecurity on a labrat (home server) for testing purposes but I dont know if it is the right option for a Production Live server.
Kernel Panic ...
Nov 1, 2008I just got 2 'kernel panic' crashes in a row (about 1 hr between them). During that time
I cannot access ssh, I need to contact the datacenter for manual reboot.
I checked logs, and I cannot see anything abnormal. I am also not sure what I should be looking for.
I'm really scarred that this is going to keep hapening.
I actually may have found something in logs:
Nov 1 13:20:43 punky kernel: audit(:0): major=252 name_count=0: freeing multiple contexts (1)
lov 1 13:20:43 punky kernel: audit(:0): major=316 name_count=0: freeing multiple contexts (2)
lov 1 13:20:50 punky pure-ftpd: (shont@84.201.220.8) [INFO] Logout.
Nov 1 13:45:04 punky syslogd 1.4.1: restart.
But I still don't know what this means.
I use CentOS.