Track Down Attack Target
Mar 23, 2009
I'm small hosting provider. On one dedicated server I have around 100 cPanel accounts.
That server is under constant, although not powerful DoS attack.
Since my company domain is not targeted on another server I believe that it is not me but one of my customers that attack is against.
Is there a way, tool, service provider than can help me pin down which account is being hit?
All accounts are on server main shared IP.
Would spreading them on another IPs help? Or would I still see attacks only on main shared IP?
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Feb 8, 2007
I've done plenty of searching on DDoS attacks and from what I've found so far it seems that it's "very difficult" track down the person(s) responsible for the attack.
My question is this - could someone actually do it if they were qualified enough? Would a hacker who is well versed in the techniques used be able to find the person(s)? Or is it just simply impossible sometimes?
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Mar 29, 2007
to copy over 11+Gb of single account to another server and we have got only 7 GB space left on our home directory.
Is there a way by which we can specify a target directory to create the backup archive for the pkgacct script.
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Apr 22, 2008
I am currently running a VPS in the Colo4Dallas datacenter. A couple users of regional Japanese sites report sluggish loading from Japan.
I am contemplating a couple possible solutions to this problem:
Move the VPS to a facility near 1 Willshire in Los Angeles. I think that one issue might be the risk of earthquakes.
Set up a separate small VPS in a facility near 1 Willshire in Los Angeles. Other than the issue above, I wonder if I am not overdoing it by setting up a second VPS.
Set up a separate small VPS with Clara Japan. They run an English service brand Usonyx.
As above, I am wondering if I am truly doing myself a favor running a separate VPS, though the benefit would be the local proximity.
Am I missing something? What are your experiences? How have you solved similar issues?
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Jun 6, 2007
Hello,
I have two similar VPS plans with identical software setups.
I installed APF Firewall on VPS A, modified the conf.apf file to
change the interfaces to venet0 and set monokern to 1 and
then opened all the ingress ports required. Started the firewall
with 'service apf start' and everything went fine, and everything
is working fine with no errors.
I did the same on VPS B but when I start apf I get the following
error that reoccurs during the startup sequence:
iptables: No chain/target/match by that name
While the firewall does seem to be running (by checking iptables -L)
I am unable to download files on the VPS, via wget or yum ...
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May 30, 2008
What configurations are needed on a whm/cpanel vps hosting account in order to be used as a mail server for a domain being hosted on another server? The domain's mx entry have already been altered to point to the target mail server.
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Apr 15, 2015
I have following Warning when creating a new Domain inside a Subscriptions:
I found this Article: [URL] .....
But in my case this does not solve the Problem.
1> All permissions are right.
2> When I type command '/usr/local/psa/bin/repair --restore-vhosts-permissions' i get the answer 'Directory permissions were successfully updated.'
3> The Order of Webuser and FTPUser (as described in the article) could also not be the problem, because in my case there is only one user (There is only Webuser and no FTP-User.)
4> When typing '/usr/local/psa/bin/repair --update-vhosts-structure' I get the following error 6 times each:
Code:
[2015-04-15 21:03:30] ERR [util_exec] proc_close() failed
Error: update-vhosts-structure failed: mkdir: cannot create directory `./webroot.kk-bits.com/logs': File exists
ERROR: Cannot relink logs. Target directory '/var/www/vhosts/webroot.kk-bits.com/logs' is in invalid state.
Unable to update the structure of the home directory: an unexpected error has occurred.
update-vhosts-structure failed: mkdir: cannot create directory `./webroot.kk-bits.com/logs': File exists
ERROR: Cannot relink logs. Target directory '/var/www/vhosts/webroot.kk-bits.com/logs' is in invalid state.
To get the error 6 times seems to mean, that i have this problem with 6 Domain.
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Apr 7, 2007
My server currently has some problems with DNS/mail, which i can't seem to fix myself. My colocation host offered to help me by giving him root access, but i don't know him very well yet. Is there some kind of script/logtool so i can track everything he did on the server? I don't want him snooping around through my webfiles and databases...
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May 25, 2009
Can anyone please tell me how dangerous in fact Apache's TRACE and TRACK functions?
I have read common explanation but would disabling TRACK and TRACE improve my server's ability to fight cross site scripting and similar attacks and make it more secure?
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Jun 27, 2009
I'd like to know, is there any way to know about hosting provider, if we have only ip address of the server. i.e.
66.63.181.74 - this is the ip address of my website server, how can i trace the service provider who is giving this hosting service?
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Oct 29, 2009
I have a few shred hosting servers I run. One of them keeps getting listed on CBL. It is very frustrating. Does anyone have an tools, tips, or tricks on finding the compromised?
So far I have confirmed that a script is using PHP to send mail out bypassing the MTA. It is faking the HELO and impersonating a well known ISP.
I used a combination of tshark and netstat. tshark can show me the HELO and EHLO. When I see the wrong entry I cross check that with netstat to see what. So Netstat only shows that it was PHP not the script path.
Here are the commands I'm running:
Code:
nohup netstat -c -p -n -e | grep -i ":25" > /var/log/monitor/netstat-smtp.log &
nohup tshark -f "port 25 and src host XX.XX.XX.XX" > /var/log/monitor/tshark-smtp.log &
Then I grep for what I'm looking for:
grep -i "HELO" /var/log/monitor/tshark-smtp.log
Is there a way to get Netstat to show the script path or complete command that is establishing the connection? Currently these scripts are eating up memory to a point that other process or getting killed off.
I also tried to force all mail through the MTA, but When I enable SMTP_BLOCK in my firewall config I get and error:
*WARNING* Cannot use SMTP_BLOCK on this VPS as the Monolithic kernel does not support the iptables module ipt_owner - SMTP_BLOCK disabled.
If there is a better way I'm game. Maybe some IDS that can tell me more of what is going on with the server?
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Oct 2, 2008
I am currently developing a web application on a WAMP server. Once complete my client will have some in-house "programmers" make changes to the code as they are needed.
My client wants to track all changes made to the source files (ie- who made the change, when it was made, what files were modified, and what specific lines were added/removed/modified). Also, the program must run on the server and not the programmers computers.
I've searched high and low and only found a couple programs that scratch the surface of what they want.
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Aug 10, 2008
how exactly email works. For example, I set my mx record to google apps in order to use google mail with my own domain. Thing is, I can sent from google mail now with my domain email address but cannot send. Furthermore, login to my website email bij www.domain.com/webmail is possible but receiving is impossible and even sending email from that place will not work.
Thinking about it it seems that email is lost
google can send but not receive
from my domain webmail i cannot receive nor send.
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Aug 29, 2007
Is there a way I can track the HTTP traffic to which domain is running with high traffic. Due to traffic load I/O wait is increasing. I want to suspend the domain that have the large traffic to avoid down time.
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Jun 16, 2013
I just installed Apache 2.4.4 and it seems to run fine overall. But in my error.log I get about 3 of these every hour or so.error.log:[Sat Jun 15 20:57:44.095961 2013] [core:notice] [pid 31400:tid 16384] AH00052: child pid 1971 exit signal Segmentation fault (11)
track down what causes this? What module? vhost?Otherwise the server seems to run fine. It's on Linux with PHP 5.3.26 and MySQL 5.1.
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Sep 28, 2006
I'm working on setting something up for monitoring my bandwidth/traffic on multiple interfaces. I have setup interface aliases so I have eth0, eth0:0, eth0:1 and the issue I'm running into is that it seems snmp cannot tell the diff between the aliased interfaces. I've found references in the cacti forums of using ipchains rules to track the bandwidth, but I've not found a good howto that explains what I need to get going on this.
Any clues/hints?
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Oct 7, 2007
What script/application can I install on my linux box to track the bandwidth per each domain?
I currently have no CP, on lighttpd.
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May 19, 2008
I have FreeBsd with Cpanel.someone is running attacking perl script from my server.Below is information about that script but it shows / path in command lsof -p 30251 | grep cwd.
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
29018 root 96 0 35968K 30528K select 0:03 2.71% 2.69% perl
newinst# lsof -p 30251 | grep cwd
lsof: WARNING: compiled for FreeBSD release 5.5-STABLE; this is 5.3-RELEASE.
perl 29018 root cwd VDIR 4,12 1024 2 /
newinst# ls -la / | more
total 22413
drwxr-xr-x 25 root wheel 1024 May 16 03:23 .
drwxr-xr-x 25 root wheel 1024 May 16 03:23 ..
-rw-r--r-- 1 root wheel 1 Feb 21 2007 .black
-rw-r--r-- 1 root wheel 1 Feb 21 2007 .black.bak
-rw-r--r-- 2 root wheel 801 Nov 5 2004 .cshrc
-rw-r--r-- 1 root wheel 355 Feb 21 2007 .new
-rw-r--r-- 2 root wheel 251 Nov 5 2004 .profile
-rw-r--r-- 1 root wheel 1 Feb 21 2007 .rbl.db
-rw-r--r-- 1 root wheel 1 Feb 21 2007 .rbl.db.bak
drwxrwxr-x 2 root operator 512 Jul 19 2005 .snap
-rw-r--r-- 1 root wheel 1 Feb 21 2007 .uribl.db
-rw-r--r-- 1 root wheel 1 Feb 21 2007 .uribl.db.bak
-rw-r--r-- 1 root wheel 1 Feb 21 2007 .white
-rw-r--r-- 1 root wheel 1 Feb 21 2007 .white.bak
-r--r--r-- 1 root wheel 6184 Nov 5 2004 COPYRIGHT
drwx--x--x 3 root wheel 512 Aug 20 2005 backup
drwxr-xr-x 2 root wheel 1024 Dec 28 2006 bin
drwxr-xr-x 5 root wheel 512 Jul 19 2005 boot
drwxr-xr-x 2 root wheel 512 Jul 19 2005 cdrom
lrwxr-xr-x 1 root wheel 10 Jul 19 2005 compat -> usr/compat
-rw-r--r-- 1 root wheel 177 Dec 5 12:15 cpgd.c
dr-xr-xr-x 4 root wheel 512 May 16 16:23 dev
drwxr-xr-x 2 root wheel 512 Jul 19 2005 dist
-rw------- 1 root wheel 4096 May 13 15:58 entropy
drwxr-xr-x 28 root wheel 4608 May 19 11:57 etc
drwx--x--x 501 root wheel 9216 May 19 01:33 home
drwxr-xr-x 3 root wheel 1024 Jul 19 2005 lib
drwxr-xr-x 2 root wheel 512 Jul 19 2005 libexec
drwxr-xr-x 2 root wheel 512 Nov 5 2004 mnt
drwxr-xr-x 3 root wheel 512 Jul 21 2005 nonexistent
drwxr-xr-x 8 root wheel 512 Oct 30 2007 opt
-rw------- 1 root wheel 22786048 May 16 04:51 perl.core
dr-xr-xr-x 1 root wheel 0 May 19 11:57 proc
drwxr-xr-x 2 root wheel 2560 Jul 19 2005 rescue
drwxr-xr-x 13 root wheel 1024 May 19 01:33 root
drwxr-xr-x 2 root wheel 2560 Jul 19 2005 sbin
drwxr-xr-x 5 root wheel 13824 May 19 01:22 scripts
drwxr-xr-x 4 root wheel 1024 Jul 19 2005 stand
lrwxrwxrwx 1 root wheel 11 Jul 19 2005 sys -> usr/src/sys
drwxrwxrwt 9 root wheel 31744 May 19 11:57 tmp
drwxr-xr-x 21 root wheel 512 Dec 5 12:12 usr
drwxrwxrwx 24 root wheel 512 May 16 16:24 var
where it is localted at/path.
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May 18, 2007
I'd like to track the email user agents that our clients use. Basically, I'd like to have something that looks like that:
[url]
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May 29, 2007
Logwatch says I send out about 3k emails each day and that is a ridiculous amount. I use postfix and do not run any sort of relay, even for myself. I have IPB 2.2.2, Wordpress 2.0.4, and Gallery 2.x.
How can I track down where these messages are originating from? Or perhaps I am reading my LogWatch file incorrectly?
Quote:
--------------------- postfix Begin ------------------------
17999281 bytes transferred
2460 messages sent
26 messages expired and returned to sender
145 messages removed from queue
Top ten senders:
24 messages sent by:
apache (uid=48):
2 messages sent by:
root (uid=0):
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Aug 9, 2007
I'm wondering if theres anything I can install on the server that will either filter or track outgoing spam. I don't want to limit the number of emails sent per hour or anything, I just want to be able to maybe search through some flagged emails or something. Or if they send the exact same email more than x times it can disable their account... I'm not sure
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Jul 16, 2008
Often when it comes to choosing or recommending a host, I tend to favor the ones that are larger, and more established such as Hotgator or Downtown Host. But in some other threads, I have seen plenty of people swear by some smaller hosts. Are there some good examples of small hosts that have been around for 3 or more years and have a great reputation?
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Sep 7, 2007
I've been trying to use mod_forensics – [url]-- which has helped on one server track down some one causing the segmentation fault due to trying to abuse FrontPage shtml.dll, but on another server also suffering from regular segmentation faults, this tool has not helped.
What other tools are available to track down the cause(s) of Apache segmentation faults?
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Sep 6, 2013
I know it's not specifically a plesk issue, but as I use plesk to resell webs and many users install (manually) wordpress, I thought I'll ask around.I would like to know if this can be done with a single sql select or if I would have to use a script to do this:
- track all mysql databases on my server
- find the proper table in each database (as the prefix can be customized, the start of the table name will probably never be the same in two WP installations)
- find the proper field in that table and check the WP version and administrator email
and then what I will do is send an email to those adresses advising them to update WP
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Mar 11, 2008
Quote:
Mar 10 20:17:55 host kernel: printk: 102 messages suppressed.
Mar 10 20:17:56 host kernel: printk: 3 messages suppressed.
Mar 10 20:18:01 host kernel: printk: 98 messages suppressed.
Mar 10 20:18:35 host kernel: printk: 34 messages suppressed.
Mar 10 20:18:51 host kernel: printk: 189 messages suppressed.
Mar 10 20:18:56 host kernel: printk: 195 messages suppressed.
Mar 10 20:19:02 host kernel: printk: 249 messages suppressed.
Mar 10 20:19:06 host kernel: printk: 36 messages suppressed.
Mar 10 20:19:21 host kernel: printk: 3 messages suppressed.
Mar 10 20:19:26 host kernel: printk: 342 messages suppressed.
Mar 10 20:19:31 host kernel: printk: 509 messages suppressed.
Mar 10 20:19:47 host kernel: printk: 54 messages suppressed.
Mar 10 20:19:51 host kernel: printk: 421 messages suppressed.
Mar 10 20:19:56 host kernel: printk: 542 messages suppressed.
Mar 10 20:20:01 host kernel: printk: 785 messages suppressed.
Mar 10 20:20:16 host kernel: printk: 340 messages suppressed.
Mar 10 20:20:21 host kernel: printk: 337 messages suppressed.
Mar 10 20:20:26 host kernel: printk: 430 messages suppressed.
Or is this something else? It's been going on for about 40 minutes. I seen my load jump to 20, to 100 and back and fourth
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May 24, 2009
I'm sure that i have Trojans and Viruses on my Server but every time i contacted My Company they ask me to pay money and then they will check and scan my server
so is it any Free application which can scan and remove all bad files on my Server? i'm looking for free applications to scan the whole server
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Jul 18, 2009
My server stop responding, I couldn't access via webmin or ssh, and DNS were not responding, so I have to ask for a reboot and now everything is fine.
Looking at the logs I found this:
Code:
Jul 18 19:23:12 server sshd[18484]: Failed password for root from 61.145.196.117 port 56817 ssh2
Jul 18 19:23:12 server sshd[18485]: Failed password for root from 61.145.196.117 port 60227 ssh2
Jul 18 19:23:13 server sshd[18488]: Failed password for root from 61.145.196.117 port 38038 ssh2
Jul 18 19:23:15 server sshd[18493]: Failed password for root from 61.145.196.117 port 49884 ssh2
Jul 18 19:24:30 server sshd[18497]: Failed password for root from 61.145.196.117 port 37929 ssh2
Jul 18 19:25:06 server sshd[18521]: Did not receive identification string from 61.145.196.117
Jul 18 19:25:09 server sshd[18508]: Did not receive identification string from 61.145.196.117
Jul 18 19:25:14 server sshd[18505]: fatal: Timeout before authentication for UNKNOWN
Jul 18 19:26:00 server sshd[18509]: Did not receive identification string from 61.145.196.117
And searching that IP on google I found it here: http://www.tcc.edu.tw/netbase/net/in...?fun=240&prd=3
And is flagged as a SSH Attack.
Any ideas why my server stopped working? and how to prevent it?
Im using CentOS 5.0
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Jun 11, 2009
i found my site load slowly, the cpu load is good. I run this command
[root@host ~]# netstat -nap |grep SYN |wc -l
526
It's seem my server is having problem with SYN attack. Is there anyway to protect it ?
I'm running apache 2.
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May 12, 2009
My site currently in prolong HTTP flood attack since 2 weeks ago. The attack was never stop and for this moment i could only mitigate the attack using my own firewall (hardware).
Since my ISP is not interested to help from upstream, even provide any mitigation services, i could only doing mitigation on my own source or using proxy services alternatively as well, but i've chose to tried on my own. I've tried once on one of well-known mitigation services out there but it seems not fully satisfied me since most of legitimate traffic is blocked from their source.
What i could do now is keep staying alive as well as will not going down on whatever situation becomes worst (but if the attack change to udp attack, i couldn't help myself coz there must be high incoming bandwidth into my network). My network is totaling 10MB last time but since this attack i've been forced to subscribe for 30MB in order to keep balance on the attack.
I've blocked all access except for my country and some other neighbours. If i change policy to allow all countries, the load of firewall will become max and after that hang will hang in less than a minute. I've done load balancing of 4 servers (8GB memory each one) and it seems the condition is getting under control with slight problem of server hang (memory shortage) and very limited keep alive connection.
Now what am i thinking is to buy a router objectively to null route incoming specific IP of countries so i can change my firewall policy to allow all connections as well as to help the firewall itself release its burden halting blocked IP that currently keep hitting itself that could might impact its performance.
Which brands of router is possible doing this thing?
Do you have some other suggestions instead of buying router?
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Apr 12, 2008
i am just having one issue in one of my highly visited website hangibar.com, its being hosted in softlayer, we are facing synattack too much in this website.
the solution which microsoft given in their website related with tcp/ip registry entry but thing is same , some where and some connections become increases too much over tcp/ip. due to that reason website become very sticky and it stop functioning the execution of sql process, during this issue i have to restart the server to establish a fresh connection.
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