CentOS 6 / Cpanel Server Crashes Daily around the same time.

General support questions
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kdolan
Posts: 1
Joined: 2015/07/22 19:13:12

CentOS 6 / Cpanel Server Crashes Daily around the same time.

Post by kdolan » 2015/07/22 19:40:37

Hello,

I am running a 8 core vps with 16gigs of ram. About 4 weeks ago all of the websites I host went down due to the server running out of memory (I'm assuming). The rent a sys admin company I pay for server support told me this was due to DDOS attacks on various cpanel accounts so I suspended them to see if they were the cause of the server crash. The next day roughly at about 24 hours and 20 minutes of uptime all websites went offline but I could still access whm / cpanel. After I initiate a restart everything comes back online. This has been a daily ritual now in order to free up memory. I started using a service called bit ninja that records my servers resource usage and bans Malicious traffic by ip. This is when I noticed the memory increasing through out the day. When I use top normally mysql is at the top of the list.

++ Output of top about half way to a crash

Code: Select all

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 3173 mysql     20   0 2441m 467m 9688 S 109.6  2.9  19:10.61 mysqld
 2874 root      20   0  149m  21m 7276 S  3.7  0.1  10:50.66 bitninja
 3456 nobody    20   0 94584  19m 6456 S  0.7  0.1   0:00.32 httpd
 5068 cpanelco  20   0 13748 6692 5364 S  0.7  0.0   2:27.65 p0f
    7 root      20   0     0    0    0 S  0.3  0.0   0:19.81 rcu_sched
  419 root      20   0     0    0    0 S  0.3  0.0   0:00.32 kworker/6:1
 1543 root       0 -20     0    0    0 S  0.3  0.0   0:03.03 kworker/0:1H
31102 nobody    20   0 99664  24m 6456 S  0.3  0.2   0:00.67 httpd
    1 root      20   0 19420 2380 2084 S  0.0  0.0   0:01.73 init
    2 root      20   0     0    0    0 S  0.0  0.0   0:00.00 kthreadd
    3 root      20   0     0    0    0 S  0.0  0.0   0:10.17 ksoftirqd/0
    5 root       0 -20     0    0    0 S  0.0  0.0   0:00.00 kworker/0:0H
    6 root      20   0     0    0    0 S  0.0  0.0   0:01.29 kworker/u16:0
    8 root      20   0     0    0    0 S  0.0  0.0   0:00.00 rcu_bh
    9 root      RT   0     0    0    0 S  0.0  0.0   0:00.47 migration/0
   10 root      RT   0     0    0    0 S  0.0  0.0   0:00.40 migration/1
   11 root      20   0     0    0    0 S  0.0  0.0   0:00.49 ksoftirqd/1
I am looking for guidance on determining my problem / any recommendations that anyone has, I have been unable to do this on my own and now I am seeking help. Thank you in advance for any time / knowledge you toss my way.

++ Information for general problems. I used the handy getinfo.sh script to output my system info and obscured hostnames and ips.

Code: Select all

== BEGIN uname -rmi ==
4.1.0-x86_64-linode59 x86_64 x86_64
== END   uname -rmi ==

== BEGIN rpm -qa \*-release\* ==
epel-release-6-8.noarch
centos-release-6-6.el6.centos.12.2.x86_64
== END   rpm -qa \*-release\* ==

== BEGIN cat /etc/redhat-release ==
CentOS release 6.6 (Final)
== END   cat /etc/redhat-release ==

== BEGIN getenforce ==
Disabled
== END   getenforce ==

== BEGIN free -m ==
             total       used       free     shared    buffers     cached
Mem:         16046       7996       8049          0        380       6093
-/+ buffers/cache:       1522      14523
Swap:          255          0        255
== END   free -m ==

== BEGIN rpm -qa yum\* rpm-\* python | sort ==
python-2.6.6-52.el6.x86_64
rpm-libs-4.8.0-38.el6_6.x86_64
rpm-python-4.8.0-38.el6_6.x86_64
yum-3.2.29-60.el6.centos.noarch
yum-metadata-parser-1.1.2-16.el6.x86_64
yum-plugin-fastestmirror-1.1.30-30.el6.noarch
== END   rpm -qa yum\* rpm-\* python | sort ==

== BEGIN ls /etc/yum.repos.d ==
BitNinja.repo
CentOS-Base.repo
CentOS-Base.repo.rpmnew
CentOS-Debuginfo.repo
CentOS-fasttrack.repo
CentOS-Media.repo
CentOS-Vault.repo
dag.repo
epel.repo
epel-testing.repo
== END   ls /etc/yum.repos.d ==

== BEGIN cat /etc/yum.conf ==
[main]
exclude=bind-chroot courier* dovecot* exim* filesystem httpd* mod_ssl* mydns* mysql* nsd* php* proftpd* pure-ftpd* spamassassin* squirrelmail*
tolerant=1
errorlevel=1
cachedir=/var/cache/yum/$basearch/$releasever
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
installonly_limit=5
bugtracker_url=http://bugs.centos.org/set_project.php?project_id=16&ref=http://bugs.centos.org/bug_report_page.php?category=yum
distroverpkg=centos-release

#  This is the default, if you make this bigger yum won't see if the metadata
# is newer on the remote and so you'll "gain" the bandwidth of not having to
# download the new metadata and "pay" for it by yum not having correct
# information.
#  It is esp. important, to have correct metadata, for distributions like
# Fedora which don't keep old packages around. If you don't like this checking
# interupting your command line usage, it's much better to have something
# manually check the metadata once an hour (yum-updatesd will do this).
# metadata_expire=90m

# PUT YOUR REPOS HERE OR IN separate files named file.repo
# in /etc/yum.repos.d
== END   cat /etc/yum.conf ==

== BEGIN yum repolist all ==
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.linode.com
 * epel: www.gtlib.gatech.edu
 * extras: mirrors.linode.com
 * updates: mirrors.linode.com
repo id                repo name                             status
C6.0-base              CentOS-6.0 - Base                     disabled
C6.0-centosplus        CentOS-6.0 - CentOSPlus               disabled
C6.0-contrib           CentOS-6.0 - Contrib                  disabled
C6.0-extras            CentOS-6.0 - Extras                   disabled
C6.0-updates           CentOS-6.0 - Updates                  disabled
C6.1-base              CentOS-6.1 - Base                     disabled
C6.1-centosplus        CentOS-6.1 - CentOSPlus               disabled
C6.1-contrib           CentOS-6.1 - Contrib                  disabled
C6.1-extras            CentOS-6.1 - Extras                   disabled
C6.1-updates           CentOS-6.1 - Updates                  disabled
C6.2-base              CentOS-6.2 - Base                     disabled
C6.2-centosplus        CentOS-6.2 - CentOSPlus               disabled
C6.2-contrib           CentOS-6.2 - Contrib                  disabled
C6.2-extras            CentOS-6.2 - Extras                   disabled
C6.2-updates           CentOS-6.2 - Updates                  disabled
C6.3-base              CentOS-6.3 - Base                     disabled
C6.3-centosplus        CentOS-6.3 - CentOSPlus               disabled
C6.3-contrib           CentOS-6.3 - Contrib                  disabled
C6.3-extras            CentOS-6.3 - Extras                   disabled
C6.3-updates           CentOS-6.3 - Updates                  disabled
C6.4-base              CentOS-6.4 - Base                     disabled
C6.4-centosplus        CentOS-6.4 - CentOSPlus               disabled
C6.4-contrib           CentOS-6.4 - Contrib                  disabled
C6.4-extras            CentOS-6.4 - Extras                   disabled
C6.4-updates           CentOS-6.4 - Updates                  disabled
C6.5-base              CentOS-6.5 - Base                     disabled
C6.5-centosplus        CentOS-6.5 - CentOSPlus               disabled
C6.5-contrib           CentOS-6.5 - Contrib                  disabled
C6.5-extras            CentOS-6.5 - Extras                   disabled
C6.5-updates           CentOS-6.5 - Updates                  disabled
base                   CentOS-6 - Base                       enabled:   6,456+62
base-debuginfo         CentOS-6 - Debuginfo                  disabled
bitninja               BitNinja Server Security              enabled:          2
c6-media               CentOS-6 - Media                      disabled
centosplus             CentOS-6 - Plus                       disabled
contrib                CentOS-6 - Contrib                    disabled
dag                    DAG RPM Repository                    enabled:   4,677+41
epel                   Extra Packages for Enterprise Linux 6 enabled: 11,062+688
epel-debuginfo         Extra Packages for Enterprise Linux 6 disabled
epel-source            Extra Packages for Enterprise Linux 6 disabled
epel-testing           Extra Packages for Enterprise Linux 6 disabled
epel-testing-debuginfo Extra Packages for Enterprise Linux 6 disabled
epel-testing-source    Extra Packages for Enterprise Linux 6 disabled
extras                 CentOS-6 - Extras                     enabled:         38
fasttrack              CentOS-6 - fasttrack                  disabled
updates                CentOS-6 - Updates                    enabled:   1,289+81
repolist: 23,524
== END   yum repolist all ==

== BEGIN egrep 'include|exclude' /etc/yum.repos.d/*.repo ==
== END   egrep 'include|exclude' /etc/yum.repos.d/*.repo ==

== BEGIN sed -n -e "/^\[/h; /priority *=/{ G; s/\n/ /; s/ity=/ity = /; p }" /etc/yum.repos.d/*.repo | sort -k3n ==
== END   sed -n -e "/^\[/h; /priority *=/{ G; s/\n/ /; s/ity=/ity = /; p }" /etc/yum.repos.d/*.repo | sort -k3n ==

== BEGIN cat /etc/fstab ==

#
# /etc/fstab
# Created by anaconda on Sun Mar  9 13:40:48 2014
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/xvda	/	ext4	noatime,errors=remount-ro,usrjquota=quota.user,jqfmt=vfsv0	0	1
/dev/xvdb       none            swap    sw                              0 0
tmpfs                   /dev/shm                tmpfs   nodev,nosuid,noexec,mode=1777        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
/proc                    /proc                   proc    defaults        0 0
== END   cat /etc/fstab ==

== BEGIN df -h ==
Filesystem      Size  Used Avail Use% Mounted on
/dev/xvda       378G  260G  114G  70% /
tmpfs           7.9G  108K  7.9G   1% /dev/shm
== END   df -h ==

== BEGIN fdisk -lu ==

Disk /dev/xvda: 411.4 GB, 411356364800 bytes
255 heads, 63 sectors/track, 50011 cylinders, total 803430400 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000


Disk /dev/xvdb: 272 MB, 272629760 bytes
255 heads, 63 sectors/track, 33 cylinders, total 532480 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

== END   fdisk -lu ==

== BEGIN blkid ==
/dev/xvda: UUID="01fd60e8-9504-4990-9c0f-e652083c1efd" TYPE="ext4" 
/dev/xvdb: UUID="0841d0f4-1b6e-4f9a-93df-3080c5d1f840" TYPE="swap" 
== END   blkid ==

== BEGIN cat /proc/mdstat ==
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] 
unused devices: <none>
== END   cat /proc/mdstat ==

== Warning: pvs is not installed ==

== Warning: vgs is not installed ==

== Warning: lvs is not installed ==

== BEGIN rpm -qa kernel\* | sort ==
kernel-headers-2.6.32-504.30.3.el6.x86_64
== END   rpm -qa kernel\* | sort ==

== Warning: lspci is not installed ==

== Warning: lsusb is not installed ==

== BEGIN rpm -qa kmod\* kmdl\* ==
== END   rpm -qa kmod\* kmdl\* ==

== BEGIN ifconfig -a ==
dummy0    Link encap:Ethernet  HWaddr 0E:D3:01:EE:1B:CC  
          BROADCAST NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

eth0      Link encap:Ethernet  HWaddr F2:3C:91:50:3D:24  
          inet addr:###.##.##.###  Bcast:###.##.##.###  Mask:###.##.##.###
          inet6 addr: 2600:3c02::f03c:91ff:fe50:3d24/64 Scope:Global
          inet6 addr: fe80::f03c:91ff:fe50:3d24/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1971705 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1838679 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:244322347 (233.0 MiB)  TX bytes:4608673974 (4.2 GiB)

eth0:cp1  Link encap:Ethernet  HWaddr F2:3C:91:50:3D:24  
          inet addr:###.##.##.### Bcast:###.##.##.### Mask:###.##.##.###
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:cp2  Link encap:Ethernet  HWaddr F2:3C:91:50:3D:24  
          inet addr:###.##.##.###  Bcast:###.##.##.###  Mask:###.##.##.###
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:cp3  Link encap:Ethernet  HWaddr F2:3C:91:50:3D:24  
          inet addr:###.##.##.###  Bcast:###.##.##.###  Mask:###.##.##.###
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:cp4  Link encap:Ethernet  HWaddr F2:3C:91:50:3D:24  
          inet addr:66.228.57.211  Bcast:66.228.57.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:cp5  Link encap:Ethernet  HWaddr F2:3C:91:50:3D:24  
          inet addr:###.##.##.###  Bcast:###.##.##.###  Mask:###.##.##.###
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:cp6  Link encap:Ethernet  HWaddr F2:3C:91:50:3D:24  
          inet addr:###.##.##.###  Bcast:###.##.##.###  Mask:###.##.##.###
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:cp7  Link encap:Ethernet  HWaddr F2:3C:91:50:3D:24  
          inet addr:###.##.##.###  Bcast:###.##.##.###  Mask:###.##.##.###
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:cp8  Link encap:Ethernet  HWaddr F2:3C:91:50:3D:24  
          inet addr:###.##.##.###  Bcast:###.##.##.###  Mask:###.##.##.###
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:cp9  Link encap:Ethernet  HWaddr F2:3C:91:50:3D:24  
          inet addr:###.##.##.### Bcast:###.##.##.###  Mask:###.##.##.###
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

gre0      Link encap:UNSPEC  HWaddr 00-00-00-00-FF-FF-E0-79-00-00-00-00-00-00-00-00  
          NOARP  MTU:1476  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

gretap0   Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          BROADCAST MULTICAST  MTU:1462  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

ip_vti0   Link encap:IPIP Tunnel  HWaddr   
          NOARP  MTU:1428  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

ip6_vti0  Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

ip6gre0   Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          NOARP  MTU:1448  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

ip6tnl0   Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          NOARP  MTU:1452  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

lo        Link encap:Local Loopback  
          inet addr:###.##.##.###  Mask:###.##.##.###
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:57211 errors:0 dropped:0 overruns:0 frame:0
          TX packets:57211 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:15674990 (14.9 MiB)  TX bytes:15674990 (14.9 MiB)

sit0      Link encap:IPv6-in-IPv4  
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

teql0     Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

tunl0     Link encap:IPIP Tunnel  HWaddr   
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

== END   ifconfig -a ==

== Warning: brctl is not installed ==

== BEGIN route -n ==
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0        ###.##.##.###   0.0.0.0         UG    0      0        0 eth0
###.##.##.###    0.0.0.0         255.255.255.0   U     0      0        0 eth0
###.##.##.###   0.0.0.0         255.255.255.255 UH    0      0        0 eth0
###.##.##.###    0.0.0.0         255.255.255.0   U     0      0        0 eth0
###.##.##.###  0.0.0.0         255.255.255.255 UH    0      0        0 eth0
###.##.##.###    0.0.0.0         255.255.255.0   U     0      0        0 eth0
###.##.##.###    0.0.0.0         255.255.255.255 UH    0      0        0 eth0
###.##.##.###    0.0.0.0         255.255.255.0   U     0      0        0 eth0
###.##.##.###   0.0.0.0         255.255.255.255 UH    0      0        0 eth0
###.##.##.###   0.0.0.0         255.255.255.0   U     0      0        0 eth0
###.##.##.###   0.0.0.0         255.255.255.255 UH    0      0        0 eth0
###.##.##.###   0.0.0.0         255.255.255.0   U     0      0        0 eth0
###.##.##.###  0.0.0.0         255.255.255.255 UH    0      0        0 eth0
###.##.##.###    0.0.0.0         255.255.255.0   U     0      0        0 eth0
###.##.##.###  0.0.0.0         255.255.255.255 UH    0      0        0 eth0
###.##.##.###    0.0.0.0         255.255.255.0   U     0      0        0 eth0
###.##.##.###  0.0.0.0         255.255.255.255 UH    0      0        0 eth0
###.##.##.###   0.0.0.0         255.255.255.0   U     0      0        0 eth0
###.##.##.###  0.0.0.0         255.255.255.255 UH    0      0        0 eth0
###.##.##.###    0.0.0.0         255.255.0.0     U     1003   0        0 eth0
###.##.##.###     0.0.0.0         255.255.255.0   U     0      0        0 eth0
== END   route -n ==

== BEGIN sysctl -a | grep .rp_filter ==
error: "Input/output error" reading key "net.ipv6.conf.all.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.default.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.dummy0.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.eth0.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.gre0.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.gretap0.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.ip6_vti0.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.ip6gre0.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.ip6tnl0.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.ip_vti0.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.lo.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.sit0.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.teql0.stable_secret"
error: "Input/output error" reading key "net.ipv6.conf.tunl0.stable_secret"
net.ipv4.conf.all.arp_filter = 0
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.default.arp_filter = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.dummy0.arp_filter = 0
net.ipv4.conf.dummy0.rp_filter = 1
net.ipv4.conf.eth0.arp_filter = 0
net.ipv4.conf.eth0.rp_filter = 1
net.ipv4.conf.gre0.arp_filter = 0
net.ipv4.conf.gre0.rp_filter = 1
net.ipv4.conf.gretap0.arp_filter = 0
net.ipv4.conf.gretap0.rp_filter = 1
net.ipv4.conf.ip6_vti0.arp_filter = 0
net.ipv4.conf.ip6_vti0.rp_filter = 1
net.ipv4.conf.ip6gre0.arp_filter = 0
net.ipv4.conf.ip6gre0.rp_filter = 1
net.ipv4.conf.ip6tnl0.arp_filter = 0
net.ipv4.conf.ip6tnl0.rp_filter = 1
net.ipv4.conf.ip_vti0.arp_filter = 0
net.ipv4.conf.ip_vti0.rp_filter = 1
net.ipv4.conf.lo.arp_filter = 0
net.ipv4.conf.lo.rp_filter = 1
net.ipv4.conf.sit0.arp_filter = 0
net.ipv4.conf.sit0.rp_filter = 1
net.ipv4.conf.teql0.arp_filter = 0
net.ipv4.conf.teql0.rp_filter = 1
net.ipv4.conf.tunl0.arp_filter = 0
net.ipv4.conf.tunl0.rp_filter = 1
== END   sysctl -a | grep .rp_filter ==

== BEGIN ip rule show ==
0:	from all lookup local 
32766:	from all lookup main 
32767:	from all lookup default 
== END   ip rule show ==

== BEGIN ip route show ==
default via ###.##.##.### dev eth0 
###.##.##.###/24 dev eth0  proto kernel  scope link  src ###.##.##.###
###.##.##.### dev eth0  scope link  src ###.##.##.### 
###.##.##.###/24 dev eth0  proto kernel  scope link  src ###.##.##.###
###.##.##.### dev eth0  scope link  src ###.##.##.###
###.##.##.###/24 dev eth0  proto kernel  scope link  src ###.##.##.###
###.##.##.### dev eth0  scope link  src ###.##.##.###
###.##.##.###/24 dev eth0  proto kernel  scope link  src ###.##.##.###
###.##.##.### dev eth0  scope link  src ###.##.##.###
###.##.##.###/24 dev eth0  proto kernel  scope link  src ###.##.##.### 
###.##.##.### dev eth0  scope link  src ###.##.##.###
###.##.##.###/24 dev eth0  proto kernel  scope link  src ###.##.##.###
###.##.##.### dev eth0  scope link  src ###.##.##.### 
###.##.##.###/24 dev eth0  proto kernel  scope link  src ###.##.##.###
###.##.##.### dev eth0  scope link  src ###.##.##.###
###.##.##.###/24 dev eth0  proto kernel  scope link  src ###.##.##.###
###.##.##.### dev eth0  scope link  src ###.##.##.###
###.##.##.###/24 dev eth0  proto kernel  scope link  src ###.##.##.### 
###.##.##.### dev eth0  scope link  src ###.##.##.###
###.##.##.###/16 dev eth0  scope link  metric 1003 
###.##.##.###/24 dev eth0  proto kernel  scope link  src ###.##.##.###
== END   ip route show ==

== BEGIN cat /etc/resolv.conf ==
options rotate
; generated by /sbin/dhclient-script
search #######.###
nameserver ###.##.##.###
nameserver ###.##.##.###
nameserver ###.##.##.###
== END   cat /etc/resolv.conf ==

== BEGIN egrep 'net|hosts' /etc/nsswitch.conf ==
#hosts:     db files nisplus nis dns
hosts:      files dns
#networks:   nisplus [NOTFOUND=return] files
#netmasks:   nisplus [NOTFOUND=return] files     
netmasks:   files
networks:   files
netgroup:   nisplus
== END   egrep 'net|hosts' /etc/nsswitch.conf ==

== BEGIN chkconfig --list | grep -Ei 'network|wpa' ==
network        	0:off	1:off	2:on	3:on	4:on	5:on	6:off
== END   chkconfig --list | grep -Ei 'network|wpa' ==
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gerald_clark
Posts: 10642
Joined: 2005/08/05 15:19:54
Location: Northern Illinois, USA

Re: CentOS 6 / Cpanel Server Crashes Daily around the same t

Post by gerald_clark » 2015/07/22 20:47:35

We cannot support systems with cPanel installed.
CPanel replaces core CentOS programs with its own programs, and then modifies the Yum configuration
so that CentOS will not update those packages.
Any advice we may give could break the system more than it is now.

CPanel is a commercial product with paid support personnel.
You need to call cPanel support for assistance.

In addition, the kernel is not CentOS either.
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