Host Ability To Self Detect
Nov 13, 2008
Do web hosts have the means to self-detect or self-correct problems with people's websites? If so, is there a name for this ability?
Seems that every host I've used has to be *told* about major problems, such as the server or database being down completely. I'm tired of going out of town fearing a site crash. I don't expect them to catch every problem, but when the failure is so blatant, it would be nice if they caught it...
How would I find a host who does this?
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Apr 19, 2009
I have a few customers that want to manage their own content. I don't think a CMS is the way to go (learning curve is too great) so I was wondering if anyone knew of a website software similar to Site Builder (but not Site Builder) that will allow a customer to edit their own content? Or maybe suggest an easy to use CMS~
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Apr 8, 2008
This is a bit off topic but I am looking for a person kind enough to test install a few RPM packages on an AMD 64 bit system with a 64 bit OS (Fedora or otherwise), preferably an Opteron but not required. The RPMs in question are IBM's DaCS which is something designed for a supercomputer yet to be created. We have one part of the DaCS model but oddly enough, we don't have any AMD systems (tons of high end Intels however).
On Intel machines, after installing these RPMs, the binary that is to be run (/usr/sbin/hdacsd) fails with a "Floating point exception" so I'd like to find out if this is an issue caused by a 3DNow optimizations to these RPM binaries (Intel does not support 3DNow) or something else.
I've put up the RPMs at [url] and the main one to be installed is dacs-hybrid-3.0.0-7.x86_64.rpm
After installation, run hdacsd (possibly in /usr/sbin) and tell me if you get the floating point exception.
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May 20, 2009
my server seems to have lost its ability to do name lookups:
Quote:
[root@cp ~]# wget =>`ossec-hids-2.0.tar.gz'
Resolving failed: Temporary failure in name resolution.
it hangs on the "Resolving bit for a long time.
my resolv.conf file is as follows:
Quote:
nameserver 66.90.68.16
nameserver 66.90.68.26
which are the 2 nameservers of my datacenter.
I tried doing a /scripts/upcp --force and I get this:
Quote:
[root@cp ~]# /scripts/upcp --force
Updating /scripts...
Sync Source:
and it just hangs there
the sites I am hosting use PHP script that make a lot of outbound web connections so this is crippling my server
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Feb 7, 2008
is there anyway to disable email sending for certain account in WHM?
i got 20 web sites on my server and i want to give to only one of them the ability to be able to send and recieve email using forms/etc..
and disable that ability for the rest.
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Mar 29, 2007
What do you think about this cabinet style's ability to cool say 18-20 1U core 2 duo servers? [see attached jpeg.]
its got a fan in the ceiling of it. I have read that ceiling fans don't do much and its the front to back cooling that really makes a difference. Is this true?
If you don't like this type of cab, which type do you like?
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Nov 5, 2009
We recently began to mirror a large number of open source projects with a dedicated mirror server on our network and I was surprised not only with how popular the mirror server has become, is, but also of the ability of the hardware we're using to keep up with the load.
At an given time, the mirror seems to be pushing at least 50 Megabits of trafficthe server is also an IRC server (irc.igsobe.com) for customers and internal staff communications.
The hardware is a low end Dell Pentium 4 @ 2.66 GHZ server, running with 512MB of RAM and a 400 GB ATA hard drive. CentOS v5.3 is the operating system.
If you're interested, you can view the HTML logfile analysis here but that doesn't tell the full story as FTP users make up a good portion of the traffic. We've received over a quarter million hits in the first few days of November alone.
18:14:15 up 65 days, 9:04, 5 users, load average: 0.31, 0.69, 0.56
The only change that I made to the default configuration was lowering the maximum number of Apache servers to 128.
Just thought I'd share this information as I wouldn't have thought a server with such a small amount of RAM would be able to serve up so much data, even though we are talking strictly static HTML files.
I'll definitely keep this in mind when clients ask me for those "what type of dedicated server should I use for XXX" type discussions that are had all too often with clients.
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Apr 21, 2009
How do you know your clients are sending bulk/spam emails?
I don't seem to understand the reports in "Email >> View Mail Statistics" section of WHM.
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Jul 25, 2009
I have a private vps server works under linux ( centos ), sometimes am getting msg from csf/firewall subject:
lfd on website.com: Suspicious process running under user user account
when i check my cpanel/whm vps ( service status ) its shows that the memory limit 80% - 85% , It's had a good forum works with vb, but am wonder how to check my vps memory, i mean how to detect if there any script, or malware, or anything takes the vps memory out...
Is there any way to check,know what works under my vps, so it's take my memory limit 85%?
i check the tmp folder,
root@www [/home]# cd /tmp
root@www [/tmp]# ls -la
total 364
drwxrwxrwt 6 root root 4096 Jul 25 02:14 ./
drwxr-xr-x 21 root root 4096 Jul 18 02:21 ../
drwxrwxrwt 2 root root 4096 Jun 30 05:50 .ICE-unix/
drwxrwxrwx 18 root root 4096 Jul 2 17:33 eaccelerator/
lrwxrwxrwx 1 root root 27 Jul 18 02:13 mysql.sock -> ../var/lib/mysql/mysql.sock=
drwxr-xr-x 3 root root 4096 Jun 30 05:29 pear/
drwx------ 3 root root 4096 Jul 5 18:31 spamd-23647-init/
-rw------- 1 root root 343335 Jul 19 02:50 whatis.bk6140
root@www [/tmp]# cd /home
and the df space
root@www [~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/simfs 80G 4.1G 76G 6% /
root@www [~]#
and the services running is
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2060 156 ? Ss Jun30 1:23 init [3]
root 7465 0.0 0.0 2444 156 ? S Jul03 0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/www.website.com.pid
mysql 7491 0.0 2.5 33452 10440 ? Sl Jul03 11:33 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --pid-file=/var/lib/mysql/www.website.com.pid --skip-external-locking
root 10236 0.0 6.0 27396 24764 ? Ss Jul24 0:07 /usr/bin/spamd -d --allowed-ips=127.0.0.1 --pidfile=/var/run/spamd.pid --max-children=3 --max-spare=1
root 11447 0.0 1.9 18364 8020 ? S Jul24 0:00 cpsrvd - waiting for connections
root 11865 0.0 0.7 13672 3260 ? S Jul06 0:00 /usr/local/apache/bin/httpd -k start -DSSL
root 13537 0.0 3.1 15092 13064 ? Ss 00:00 0:02 lfd - sleeping
root 13703 0.0 0.3 3808 1284 ? SN Jul06 0:01 cpanellogd - sleeping for logs
root 13739 0.0 0.6 5856 2844 ? Ss Jul06 0:00 cPhulkd - processor
root 13795 0.0 1.5 14760 6304 ? S Jul06 0:00 cpdavd - accepting connections on 2077 and 2078
root 18161 0.0 0.0 1716 380 ? Ss Jun30 0:24 syslogd -m 0
root 18164 0.0 0.0 1668 72 ? Ss Jun30 0:00 klogd -x
dbus 18193 0.0 0.0 2736 212 ? Ss Jun30 0:00 dbus-daemon --system
root 18213 0.0 0.0 2716 172 ? Ss Jun30 0:00 xinetd -stayalive -pidfile /var/run/xinetd.pid
root 18399 0.0 5.9 27604 24404 ? S Jul24 0:06 spamd child
root 19461 0.0 0.1 3228 684 ? Ss Jun30 0:08 crond
root 19616 0.0 0.0 1820 124 ? Ss Jun30 0:00 /usr/sbin/portsentry -
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May 4, 2008
My server run after 10h sevices ftp is down (network error: connection timed out). may be flood ftp.
how to Detect flood ftp.
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May 22, 2007
I have a few incomplete steps to see if I got some intruder in my Linux system.. But i really would like to have all your suggestions to make a good doc about this matter,
1.- Download and run Rkhunter & Chkrootkit
2.- Run "w", and "netstat -nalp |grep "SHPORTHERE" to see whos connected using SSH
3.- Search for ssh and ftp accepted logins.
Code:
last
cat /var/log/secure* | grep ssh | grep Accept
cat /var/log/secure* |grep ftp |grep Accept
less /var/log/messages | grep ftp
4.- Watch current connections and scan your ports.
Code:
netstat -nalp
nmap 1-65535 localhost
5.- Search for suspicious content on common explotable dirs.
Code:
rm -rf /tmp/sess*
rm -rf /var/dos-*
rm -rf /var/tmp/ssh-*
rm -rf /var/tmp/dos-*
ls /tmp -lab
ls /var/tmp -labR
ls /dev/shm -labR
ls /usr/local/apache/proxy -labR
ls /usr/local/samba -labR
6.- Checking for anomalies on this files.
Code:
less /etc/passwd
less /etc/shadow
less /etc/groups
7.- Search for new users at sudoers, check wtmp and telnet is not running.
Code:
cat /etc/sudoers
who /var/log/wtmp
cat /etc/xinetd.d/telnet
8.- Find bash history files
Code:
find '/' -iname .bash_history
9 .- Verify the Crontab table
Code:
crontab -l
10 .- Update the slocate database and search for exploits.
Code:
updatedb &
For cPanel servers:
Code:
egrep -i '(chr(|system()|(curl|wget|chmod|gcc|perl)%20' /usr/local/apache/logs/*
egrep -i '(chr(|system()|(curl|wget|chmod|gcc|perl)%20' /home/*/statistics/logs/*
For Ensim servers:
Code:
egrep -i '(chr(|system()|(curl|wget|chmod|gcc|perl)%20'/home/virtual/site*/fst/var/log/httpd/*
Search for shell code:
Code:
cat /path/of/your/web/logs/* |grep "/x90/"
11.- Search for hidden dirs
Code:
locate "..."
locate ".. "
rlocate " .."
locate ". "
locate " ."
12.- Search for perl-scripts running
Code:
ps -aux | grep perl
13 .- Checking nobody user and open files.
Code:
service httpd stop
lsof -u nobody
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Apr 6, 2009
I have a server of my own. Unfortunatlly 20% of the time, the server is down even though my connection to internet always up.
I am checking the event log but cannot see anything odd...
OS:Windows server 2003
Is there any tool to detect why the server is down most of the time?
I can post the event viewer errors that I can find suspeicious if needed.
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May 19, 2009
is there any proved method to determine what kind of attack you are under? Our server has been under attack for more than a day now but so far we have not been able to find out what kind of attack it is exactly. The server maintence company we are using says it's a DDoS attack but they don't say how they found this out. Also, they are not telling us what kind of DDoS attack it is.
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Jul 31, 2009
i have some issue,
sometimes,a user may be banned by our firewall,
or the dns of his pc does not work well,...and so on,
by the way,
they can not link to server,
and it spend a lot of time to check where is wrong from his pc aside.
i want to ask if it is possible i use a php script or a exe let him to execute,
and it will help me detect user's pc configuation,
it include his IP/DNS/fateway/trace and ping result,...and so on.
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Jul 25, 2008
Is there any way to distinguish a dedicated server from VPS using Linux commands and detect the implemented virtualization technology like XEN and OpenVZ, ...?
I have received a dedicated server and in cPanel its written Virtuozzo but they tell me it's XEN , beside this what's the reason to implement a virtualization technic while they give me a dedicated server? Maybe to obtain cheaper cPanel license,
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Aug 1, 2009
If i put domain.com on uptime checker,and downtime is detected,downtime will be reported if dns is down or if http server is down.So question is what i need to do to see what exactly went down?For network uptime i can ping ip adress,but for these two i really don't know.
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Aug 15, 2008
how i can detect and disable C99 shell and another shell script exp:r57 ....
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Sep 28, 2009
I know the ISP is RADIGRAFICA COSTARRICENSE, and the server location is San José in Costa Rica.
I googled the ISP name RADIGRAFICA COSTARRICENSE, trying to find out the company site which offer's web hosting service, but I can only find racsa.co.cr; however, this doesn't look like a web hosting company.
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Aug 2, 2009
On one server which i have sometime appear very high load up to 70,and that causing downtime of few minutes(i have historic data webmin module where i saw high load and downtime time matches,but it doesn't show what causing it).That server also have hardware raid in mirror mode.(copies exact data from one disk to another).
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May 6, 2009
Sometime ago the DC told me there was too many files on server and I started to investigate what is was and i got info that some one hacked the server and was sending spam from it.
When I looked at the accounts in Direct Admin some of them had the contact email to some hacker so i deleted the emails and changed password on the DA account and the email of those accounts.
Still I got too many files all the time so the server goes down so i have to delete the spoolfile all the time like 10 times a day
Please help how do I detect from what account do the hacker operate?
Can I detect that somehow?
Is it possible to do some small script to detect this?
Is there any advanced module to DA that gives me the info?
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Oct 29, 2007
How does one go about detecting what mail server software you have installed and running on your server?
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Jan 10, 2007
Everything I found is the type of RAID controller installed. It's Adaptec 4800SAS SA-SCSI RAID-10. Nothing in /proc about types of HDDs.
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Dec 12, 2007
My server running centOS4 and cPAnel.
Can anyone let me know how to auto detect a hack local file ? eg: review cgi-telnet, c99sell ....
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Nov 1, 2013
configure Apache server to handle users requests using condition based on where he come from so i can redirect him . what i need if user came with from site start with xn--* redirect him to virtual host and if he came from any other link then go to another virtual host
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Feb 22, 2008
how can i remotly( SSH) figure out what kind of raid controller is on my system?!
and how many harddisks my system has and what size?!
I am working on Linux( Centos4)
if i do
#df -h
then i get 146 G
so if my system has raid1, does it mean that the harddisk is 2 X 146 G?
or i should actually see it as 146 / 2?
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Nov 7, 2008
sometimes, some people may try to guess the password of ssh,whm,ftp,...etc,
or any ddos attack,
do you only use iptables to place this problem?
or do you install any other scripts to secure your server?
my serve is centso.
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Mar 22, 2007
I am suspecting that we have spyware or virus on our server. How do I detect and remove it from windows 2003 server?
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May 12, 2013
My linux host requires a few lines of codes in my .htaccess file to properly run my site.
However, these few lines of codes are not supported by my local Wamp on Win7.
Is there a way to add a "If Wamp Then not run these lines" in my htaccess file
So that I don't have to manually change the .htaccess file before upload/downloading the site between the two systems?
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Feb 20, 2007
What command line do you use to detect account storing music/video?
What command line do you search for file that is greater than 1MB?
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