What Would It Take To Crash The DNS Root Servers
Feb 15, 2007
No one could have missed that there was a DDoS attack on the DNS root servers last week. It’s been all over the news. It seems that aside from the G node (ironically the US Department of Defense) the rest of the nodes did ok (especially since anycast spreads out requests for 6 of the 13 root servers to over a 100 other locations).
In other words, the DNS root servers seem pretty impossible to take down (which is a good thing!)
But...
What would it take to bring down the DNS root servers? What weak links are there?
It would be interesting to have a discussion around this.
View 3 Replies
ADVERTISEMENT
Aug 23, 2014
Cpanel Server is crashing frequently and customer suspecting that it should be a hardware issue, what are all the logs and tools you need to check to figure out the root cause of the crash?
View 1 Replies
View Related
Nov 25, 2008
I have read that although chained root ssl certificates can be more difficult to install they are actually more secure since the root certificate cannot be compromised, only the intermediary.
Is this true? It looks like both google and amazon both use chained SGC certs.
View 0 Replies
View Related
Nov 23, 2008
i have the following server specs :-
Processor Intel Quad-Core Xeon X3323 2.5GHz/2x6MB 1066FSB
RAM 4GB 667MHz Dual Rank ECC Memory (4X1GB)
i have some sites vb forums / proxy sites / file hosting site / tube sites , all together some 10-12K visitors a day , i am using xcache , but still apache is crashing many times ,what should i do , i have asked platinum server management guys, they disable logs , suexec but still no luck, will increase of another 2gb of ram help me?
View 9 Replies
View Related
Jun 2, 2008
We are now online after The Planet crash but since this morning we have a strange problem...
All our servers are resolving, including our database server but the servers do not see the database server (Ip not resolving...)
Our computer to database server = Resolving
Our computer to servers = Resolving
Servers to database server = Not Resolving
View 6 Replies
View Related
Jul 8, 2008
The Apache service is getting crash and creaing following logs
[Mon Jul 07 23:52:21 2008] [notice] child pid 12878 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:21 2008] [notice] child pid 12881 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:21 2008] [notice] child pid 12886 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:22 2008] [notice] child pid 12859 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:23 2008] [notice] child pid 12904 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:23 2008] [notice] child pid 12909 exit signal Segmentation fault (11)
[Mon Jul 07 23:52:25 2008] [notice] child pid 12877 exit signal Segmentation fault (11)
Server Specification.
4GB RAM
Apache : 2.0.52
PHP : PHP 5.2.5
MySQL : 5.0.51
httpd.conf
KeepAlive Off
MaxKeepAliveRequests 50
KeepAliveTimeout 10
StartServers 16
MinSpareServers 8
MaxSpareServers 64
ServerLimit 1000
MaxClients 500
MaxRequestsPerChild 5000
ServerSignature On
my.cnf (Seprate box with 2GB RAM)
log-slow-queries = /var/log/mysql/mysql-slow.log
skip-external-locking
skip-locking
skip-innodb
skip-bdb
skip-name-resolve
max_connections = 800
max_user_connections = 800
key_buffer = 36M
key_buffer_size = 64M
myisam_sort_buffer_size = 64M
join_buffer_size = 2M
read_buffer_size = 2M
sort_buffer_size = 3M
thread_stack = 128K
table_cache = 1024
thread_cache_size = 286
interactive_timeout = 25
wait_timeout = 1800
connect_timeout = 10
max_allowed_packet = 16M
max_connect_errors = 999999
query_cache_limit = 8M
query_cache_size = 64M
query_cache_type = 1
tmp_table_size = 16M
old_passwords=1
user=mysql
quick
quote-names
max_allowed_packet = 16M
[isamchk]
key_buffer = 16M
View 7 Replies
View Related
Jan 3, 2009
I have in my possession a new server which is running cPanel. For some unknown reason it keeps crashing about every 4-6 hours where I must get a remote reboot done.
Its starting to annoy me that I'm unable connect to anything. What I suspect is high disk red/write. As what I'm finding is over 10k blocks being written per second with only 300 being read per second. I also am not seeing any bandwidth out/in usage being high.
View 14 Replies
View Related
May 27, 2009
I have a dedicated server with NyNOC and earlier on today the server dissapeared off the net, wouldn't respond to ssh, http etc, nor pings
I submitted a ticket and the server got rebooted, went through the FSCK check and came back up ok, but now I'm concerned as to what caused it
Andy the technician said he couldn't find out the reason why and neither can I
I can only put it down to PERHAPS faulty hardware somewhere?
The /var/log/messages file doesn't say anything useful, the last entries show..
Quote:
May 27 06:41:17 server kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:xxxxxxxx SRC=xxxxxxxx DST=255.255.255.255 LEN=153 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=8778 DPT=11777 LEN=133
May 27 06:56:43 server kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:xxxxxxxx SRC=xxxxxxxxx DST=255.255.255.255 LEN=153 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=8778 DPT=11777 LEN=133
May 27 07:02:56 server kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=00:14:d1:14:a7:c0:00xxxxxxxxx SRC=xxxxxxxxx DST=xxxxxxxx LEN=622 TOS=0x00 PREC=0x00 TTL=48 ID=0 DF PROTO=UDP SPT=54284 DPT=1027 LEN=602
May 27 07:03:13 server kernel: Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:14:d1:14:a7:c0:xxxxxxx SRC=xxxxxxxx DST=xxxxxxxx LEN=48 TOS=0x00 PREC=0x00 TTL=117 ID=47647 PROTO=TCP SPT=21173 DPT=22 WINDOW=65535 RE$
May 27 13:01:45 server syslogd 1.4.1: restart.
May 27 13:01:45 server kernel: klogd 1.4.1, log source = /proc/kmsg started.
May 27 13:01:45 server kernel: Linux version 2.6.18-128.1.10.el5PAE (mockbuild@builder16.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)) #1 SMP Thu May 7 11:14:31 EDT 2009
May 27 13:01:45 server kernel: BIOS-provided physical RAM map:
May 27 13:01:45 server kernel: BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
May 27 13:01:45 server kernel: BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
May 27 13:01:45 server kernel: BIOS-e820: 00000000000e7000 - 0000000000100000 (reserved)
May 27 13:01:45 server kernel: BIOS-e820: 0000000000100000 - 00000000affb0000 (usable)
May 27 13:01:45 server kernel: BIOS-e820: 00000000affb0000 - 00000000affc0000 (ACPI data)
May 27 13:01:45 server kernel: BIOS-e820: 00000000affc0000 - 00000000afff0000 (ACPI NVS)
May 27 13:01:45 server kernel: BIOS-e820: 00000000afff0000 - 00000000b0000000 (reserved)
May 27 13:01:45 server kernel: BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
May 27 13:01:45 server kernel: BIOS-e820: 00000000fee00000 - 00000000fef00000 (reserved)
May 27 13:01:45 server kernel: BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved)
May 27 13:01:45 server kernel: BIOS-e820: 0000000100000000 - 0000000140000000 (usable)
May 27 13:01:45 server kernel: 4224MB HIGHMEM available.
May 27 13:01:45 server kernel: 896MB LOWMEM available.
May 27 13:01:45 server kernel: found SMP MP-table at 000ff780
May 27 13:01:45 server kernel: Memory for crash kernel (0x0 to 0x0) notwithin permissible range
May 27 13:01:45 server kernel: disabling kdump
You can see it was down for some 6 hours, but I can't find a reason why
Diskspace is ample, there's no odd programs/scripts installed (it's a Centos server running whm with CSF firewall)
View 11 Replies
View Related
Jul 15, 2009
This is something i was wondering about and never found any answers.
Based on your experience, what are the most common reasons mysql tables crash?
View 9 Replies
View Related
Jul 1, 2008
I reboot my cpanel server twice last night and it had crash
I am now running e2fsck and it's trying to fix the inode thing.. i've been pressing <y> 10000 times! Poor thing my fingers cramp
I've been thinking to mount my primary drive into another cpanel server (not a fresh server) as secondary drive and restore from there. The question is how? I need detailed steps by steps as it's urgent for me..
View 4 Replies
View Related
Aug 15, 2007
I just got a new server the other day, installed cpanel and all my usual stuff in it.
Then I started transferring some accounts off my other server on the same network. It would transfer small accounts ok but I have this one big account,. the sql is like 300 mb. It would get to the restore on it then the server would crash and be totally unresponsive.
It has to be manually rebooted at the datacenter. There is nothing in any logs. At first I thought it was the load getting hi and doing it but I ran the unix bench and got the load to 14 and it didnt hurt it.
It only does this on restoring big sql db. At the dc they say the screen on the console goes blank.
Ive done looked and cant find anything in the box. Its actually the same exact setup I use for my other servers.
So the dc is looking at it today. Has anyone ever ran into a problem like this and if so what was the cause?
View 2 Replies
View Related
Feb 16, 2007
What could cause the following on one of our servers?
Rebooted and was fine.
May have happened before, will have to dig deeper into logs.
Running CestOS 4.4 (cPanel/WHM)
Assertion failure in __journal_file_buffer() at fs/jbd/transaction.c:1966: "jbd_is_locked_bh_state(bh)"
------------[ cut here ]------------
kernel BUG at fs/jbd/transaction.c:1966!
invalid operand: 0000 [#1]
SMP
Modules linked in: ipt_state ipt_TOS iptable_mangle ip_conntrack_ftp ip_conntrack_irc ip_conntrack ipt_REJECT ipt_LOG ipt_limit iptable_filter ipt_multiport ip_tables autofs4 sunrpc md5 ipv6 loop dm_mirror dm_mod button battery ac uhci_hcd ehci_hcd e100 mii ext3 jbd ata_piix libata sd_mod scsi_mod
CPU: 1
EIP: 0060:[<f8830dfc>] Not tainted VLI
EFLAGS: 00010216 (2.6.9-42.ELsmp)
EIP is at __journal_file_buffer+0x42/0x221 [jbd]
eax: 0000006b ebx: e5b6d3dc ecx: da83add0 edx: f88361ca
esi: f6da3300 edi: 00000001 ebp: 00000000 esp: da83adcc
ds: 007b es: 007b ss: 0068
Process pdflush (pid: 5216, threadinfo=da83a000 task=cb5ad2b0)
Stack: f88361ca f8835eac f88361b5 000007ae f8836634 e5b6db3c 00000000 dcca5660
e5b6d3dc f7638d68 f7f48200 f8830165 f7f482e4 00000000 00001000 f7638d68
dcca5660 00000000 f8898e42 00001000 00000000 dcca5660 f8898cda dcca5660
Call Trace:
[<f8830165>] journal_dirty_data+0x17d/0x1bc [jbd]
[<f8898e42>] ext3_journal_dirty_data+0xc/0x2a [ext3]
[<f8898cda>] walk_page_buffers+0x62/0x87 [ext3]
[<f889927a>] ext3_ordered_writepage+0xee/0x13a [ext3]
[<f889917a>] journal_dirty_data_fn+0x0/0x12 [ext3]
[<c0178962>] mpage_writepages+0x1c2/0x314
View 5 Replies
View Related
Jan 28, 2007
we have dual xeon linux server redhat 9 / cpanel
we have a strange crash .... you cant access ftp /ssh / httpd ...
i need to request a server reboot to get access ... and everything after this run ok...
i have check message log .. nothing in it for example
10:20:10 ftp log
11:15:60 rebootlog
also the same in httpd log ...
so as you see there is a gab between the server crash till reboot....
this happen 3 times till now ...
View 3 Replies
View Related
Mar 10, 2007
The Apache server on one of my box crashed last night and the log file simply states:
[Fri Mar 09 23:51:49 2007] [notice] caught SIGTERM, shutting down
One thing puzzled me is that there are a couple of symbolic links created in Apache home directory:
lrwxrwxrwx 1 root root 25 Mar 9 23:51 build;45f23959 -> ../../usr/lib/httpd/build
lrwxrwxrwx 1 root root 19 Mar 9 23:51 logs;45f23959 -> ../../var/log/httpd
They were created around the same time when Apached stopped.
Has anyone seen similar things like this? What could be the root cause?
View 5 Replies
View Related
Apr 21, 2007
My server is constantly crashing (halting to dead) and needing reboot literally every few hours. I cannot trace the cause of this whatsoever. Please help out.
CPU/Memory/MySQL Usage shows no accounts in red or yellow zone ....
View 6 Replies
View Related
Apr 14, 2009
I have a windows 2003 server with Plesk installed. It keeps crashing and requires a reboot every couple of days.
Here are screenshots of event logs and task manager.
Also, its a Pentium HT with 1GB memory, so it isn't too slow for Windows.
View 4 Replies
View Related
Mar 6, 2008
lighttpd crash with 500 internal error.
connection is about 1000. the load average is only 0.78.
Is lighttpd good for dynamic site?
Maybe I need to switch back to apache.
Here is the log file.
Quote:
2008-03-06 10:45:00: (mod_fastcgi.c.2855) backend is overloaded; we'll disable it for 2 seconds and send the request to another backend instead: reconnects: 1 load: 545
2008-03-06 10:45:00: (mod_fastcgi.c.2855) backend is overloaded; we'll disable it for 2 seconds and send the request to another backend instead: reconnects: 0 load: 546
2008-03-06 10:45:00: (mod_fastcgi.c.2855) backend is overloaded; we'll disable it for 2 seconds and send the request to another backend instead: reconnects: 1 load: 546
2008-03-06 10:45:00: (mod_fastcgi.c.3496) all handlers for /view_video.php on .php are down.
2008-03-06 10:45:03: (mod_fastcgi.c.2633) fcgi-server re-enabled: 0 /var/run/lighttpd/php-fastcgi.socket
2008-03-06 10:45:03: (mod_fastcgi.c.2633) fcgi-server re-enabled: 0 /var/run/lighttpd/php-fastcgi.socket
2008-03-06 10:45:03: (mod_fastcgi.c.2633) fcgi-server re-enabled: 0 /var/run/lighttpd/php-fastcgi.socket
2008-03-06 10:45:03: (mod_fastcgi.c.2633) fcgi-server re-enabled: 0 /var/run/lighttpd/php-fastcgi.socket
Here is part of the conf file
Quote:
####################
server.max-keep-alive-requests = 0
server.max-keep-alive-idle = 4
server.max-read-idle = 60
server.max-write-idle = 1024
server.max-fds = 8192
## for PHP don't forget to set cgi.fix_pathinfo = 1 in the php.ini
fastcgi.server = ( ".php" =>
( "localhost" =>
(
"socket" => "/var/run/lighttpd/php-fastcgi.socket",
"bin-path" => "/usr/bin/php-cgi",
"bin-environment" => (
"PHP_FCGI_CHILDREN" => "8",
"PHP_FCGI_MAX_REQUESTS" => "8000"
)
)
)
)
View 14 Replies
View Related
May 29, 2007
I run a web counter/tracking service on a dedicated server with 2x SATA discs (RAID1). There are about 100 MySQL queries per second, most of them are served from RAM cache, about 10-20 per second are inserts directly to disc.
My question: is it possible that this load physically damages the discs over time so that the disk crashes sooner or later?
View 4 Replies
View Related
May 16, 2007
I've a question, one of the dedicated servers with CentOS and Plesk 8.1.1 crashed. Critical system files were corrupted so it was impossible to start the server.
What we could do is backup;
/var/www/vhost/*.*
/var/lib/mysql/*.*
We installed a new server with same software (CentOS and Plesk 8.1.1), we placed the backupped directories back, restored the MySql database...
But how can we restore the settings? With putty / commandline we can open all restored databases. But we have a feeling that the PSA database is not connected with the Plesk admin (GUI)...
Our primary question, how do we get our settings back in Plesk (like accounts; clients, domains, dns-records and so on?)
View 1 Replies
View Related
Jun 2, 2015
We have an ongoing problem with Plesk on 1and1 dedicated servers.We host around 80 websites, all of which are very light and have relatively low traffic. When we get to setting up around the 70th website and create a new sub-domain, Apache crashes with the error:
Template_Exception: Can not restart web server:
file: /usr/local/psa/admin/plib/Service/Driver/Web/Server/Apache.php
line: 104
code: 0
We then run "bootstrapper.sh repair" to get Apache back online. But can't create any new sub domains, without the same issue occuring. With each server, 1and1 raise a ticket with Parallels, who log in and fix the issue. But then Following the Parallels fix, the server runs slowly, sometime throwing up 502 errors etc, which nobody is able to fix, and again, we have to move servers.We have just hit exactly the same issue on our 3rd and final 1and1 server.
View 1 Replies
View Related
Mar 19, 2008
I have a lynix root server with 1and1.com and recently the server has been going down I have no access to FTP/the sites or root. Their support tells me to look in var/log but im not sure what file to look in or what im looking for as far as to why the server would crash.
So far my solution has been to re boot the server and it has been working but i need to find the cause of this...any suggestions on where to look or what to look for?
View 14 Replies
View Related
Oct 29, 2009
I have server load like 40.
Nothing lags.
Server has RAM usage 20% and CPU usage goes up to 25%
Swap isnt used at all.
Should I be afraid of server crash incase server load goes up to 60 or 80 without ram and cpu usage rising that much?
View 9 Replies
View Related
Jun 13, 2008
I have a Linux server running some reasonable setups:
Opteron 180, 4 GB RAM, running 8x 36gb 15k scsi with hardware raid 10 -- this is one of the servers from WebNX advertised here not long ago
Running CentOS 4(?), Apache2/MySql 4/PHP5.2, the normal stuff.
I have only one main site on the server, which runs a pretty old PostNuke CMS in Chinese (0.7.2.3 Phoenix) + PNphpBB2 + Gallery 1.5.7 (all integrated into PostNuke). This site is pretty light in "human" traffic, getting about 20K hits per day.
Now, the problem I have noticed with this site, is related to the many MP3 files stored in the Gallery albums. There are lots of HTTP requests to these files, most maybe from Chinese search engine bots (judging from IP), that slows the server to a crawl and even crashes Apache. This happens in the late hours here when it's day time in China. As a matter of fact I just did a reboot, and in 5 minutes there are more than 1000 HTTP requests to MP3 files resulting in a traffic of 2.1+ Gb. So within minutes, the server is brought to its knees again and I can't even get the "apache status" from CPanel now: "Unable to retrieve apache status".
The company that manages the server for me said there's no security problem here. We have installed an Apache extension to limit the number of simultaneous requests to media files to 1. However that doesn't seem to help.
View 6 Replies
View Related
Oct 12, 2007
for months my server has been running fine, since about a week ago the server crashed and was up and down
the fault was found to be faulty ram which has been replaced.
now I have had every tom, dick & harry take a look at the server to get it stable again but im still having issues.
The server seems to run fine but crashes when I try and repair or backup my database.
the database is large like 30gig but the server used to do this fine before but it wont now, it get so far then hangs.
Server:
Dual Core Xeon
4GB Ram
2x 250GB HDD
Raid 1
View 6 Replies
View Related
Dec 3, 2007
My RAM is 2G.
The cache memory of my server is eating, After 2 weeks, the cache memory is below 1G, then the server crashed.
After I reboot the machine, the cache memory back to normal. But it starts to eating again.
I have attached the graph.
I am using lighttpd, php, mysql
View 5 Replies
View Related
Apr 5, 2007
I have a problem. to buy dedicated server but I don't really know what to buy. I need some kind of stress test for server so that I can be assured that my website won't crash when it will be on front page of digg. Does something like that even exists?
View 7 Replies
View Related
Jul 6, 2007
The company I work for unfortunately runs their site on a IIS server. I want to install some forum software, vBulletin or phpBB onto the server and run it on the same site. PHP of course needs to be installed to do this.
Boss is worried that putting PHP on same server as ASP might take down the site if something goes wrong. What are the odds of this happening if I follow directions and what steps should I take to install?
View 4 Replies
View Related
Sep 5, 2007
I am running FC2 with cPanel.
My server stopped responding to everything from http to ping and I had to do a hard reboot on it.
Now, I'd like to figure out what happened but am not sure where to start. I've been sifting through /var/log/messages but can't pin point what I'm looking for.
View 6 Replies
View Related
May 13, 2008
I see following error in my server memory informatiow can resolve this issue?
Memory for crash kernel (0x0 to 0x0) notwithin permissible range
Memory: 4143608k/5242880k available (2078k kernel code, 48376k reserved, 860k data, 220k init, 3275776k highmem)
View 2 Replies
View Related
