I'm running CentOS 4.4 and I want to know what utilities and procedures I need to follow to find out if my system is compromised (hacked).
I dont see any symptoms right now but I want to be fully aware in case something happens.
on making my CentOs VPS system more secure?
View 5 Replies View RelatedI have a centos server & whenever I reboot it, it goes into File System check and takes about 1 hr to turn online.
The irony is, I reboot the server only when the load goes high (esp when traffic is high).. And the server is down for long times when traffic is high.
The server config is pretty good, but it shows these problems once in 15-20 days.
to have assp run on system startup, since my server seems to be suffering from random reboots.
I need to run the command perl /usr/share/assp/assp.pl when the system turns on, so that it will receive mail and I can send mail..
I currently run a dedicated with redhat 9 and am looking at a new server with either Fedora Core, CentOS, or FreeBSD.
I'd like your opinions on the best o/s to go with overall and also bearing in mind I'm coming from redhat and will be running cpanel on it...
My company and I are currently discovering Plesk on a CentOS 6.6 based system. We are migrating from an old system on which FTP usernames could hold uppercase letters, which apparently is not the case in Plesk 11 (or is it because of CentOS?).
Anyway, as we can't change these FTP account names, I was thinking about creating a rule with mod_rewrite in the proftpd.conf file.
So the question is: how can I reinstall/reconfigure proftpd with this module activated? I don't even know where to find the corresponding package (which repo, correct version, etc...)
I have a new CentOS 7, with Plesk 12, CentOS 7 by default has XFS filesystem.
I try migrate sites from another Plesk Server but Plesk agent say: "hard disk quota is not supported due to configuration of server file system" (my CentOS 7)
My CentOS7:
CentOS Linux 7.0.1406 64 bits
Plesk 12.0.36
My fstab
[root@ns ~]$ cat /etc/fstab
/dev/mapper/centos-root / xfs defaults,usrquota,grpquota 1 1
UUID=ba391bd5-786c-4ae7-8bbd-f36f831ae6eb /boot xfs defaults 1 2
/dev/mapper/centos-swap swap swap defaults 0 0
I added "usrquota,grpquota", then mount -o remount / ; but when I try quotacheck -fmv / I gest this:
[root@ns ~]$ quotacheck -fmv /
quotacheck: Skipping /dev/mapper/centos-root [/]
quotacheck: Cannot find filesystem to check or filesystem not mounted with quota option.
but quotaon command works:
[root@ns ~]$ quotaon /
quotaon: Enforcing group quota already on /dev/mapper/centos-root
quotaon: Enforcing user quota already on /dev/mapper/centos-root
The problem here is why Plesk does not recognize quotas as enabled on CentOS 7??
If I try this command it seems good:
[root@ns ~]$ /usr/local/psa/admin/sbin/usermng --isquotable
0
Also I do this:
- Disabled Selinux
- Check all packages as quota, etc.
I have been using some reference: [URL] ....
What is the difference between CentOs 5.0 and Centos 4.5? (Both contains Plesk)
Would CentOS 5 contain more updates and fixes? CentOS 4.5 be more stable?
I am renting a 384mb Plesk VPS, have 1 client website on it, and it was hacked. Someone set up a new user with root access and was attacking other networks including dictionary attacks. My host has cleaned up the mess. I suspect access was gained thru a weak password choice or thru a Wordpress hack.
The client website ran a php/mysql survey script sometimes with 20-25 simultaneous users, and about 5-10% were unable to complete the survey due to screen freeze up or time outs. I'm trying to get to the bottom of these errors and know that some of the problems were client side but could the attacks also have affected connectivity & website performance?
2 days ago i noticed my cpanel hardisk usage was a lot more then it should be, after looking around i found out my inbox was 400mb (82143)emails!! i don't use any of the cpanel email because i have them set to forwarding. all the emails are spam and i discovered a few emails using my domain (that i did not create) that are valid and when i email them it reaches this cpanel inbox
So how bad is it? have i been completely comprised or is someone managed to get some type of spaming access only?
I have a server with about 100 domains on it in Plesk. I have about 10 or so clients that pay me a pittance to host their site and the rest are various domains that have been parked.
About a week ago we received a "too many connections" error when accessing Plesk. This is our server and it sits at The Planet (formerly EV1). I cranked up the mx connections to 1,100 or so following some web tutorial but I'm really a complete idiot when it comes to this server stuff. (I'm more of a php / html kind of guy).
I check out logs and it appears that someone has been trying to access a bunch of celebrity images that shouldn't exist on our server. It's clearly spam of some kind. I can't seem to actually find these images on my server anywhere, but I've got a feeling that foul play has been involved.
Well, this is rather weird. I cant tell if this is a server error, or a hack.
Basically the contents of the thumbnail directories for videos, games and pictures were deleted, at 3pm today (according to the ftp time stamp). All those folders were chmodded 777, to allow PHP to upload the images into them.
My cpanel server has an intruder who brought all the sites down. I did my best to harden the server a year or so ago, but...
I got an email from one of my scripts:
SUBJECT: [hackcheck] kill has a uid 0 account
IMPORTANT: Do not ignore this email.
This message is to inform you that the account kill has user id 0 (root privs).
This could mean that your system was compromised (OwN3D). To be safe you should verify that your system has not been compromised.
To say the least, the server was compromised. I cannot find the user "0" or "kill" in WHM, but under "Wheel Group Users" "kill" is listed under "Add a user to the wheel group."
Any help or insight would be appreciated! Anyone proficient at hardening servers and exorcising hackers?
I uploaded the latest chkrootkit and ran it. The results say it's clean.
Am I hacked by somebody?
Any thing I can do to stop this (for example by hiring server management company)???
Here's the info that RKHunter provided:
/sbin/modinfo [ NA ]
/sbin/insmod [ NA ]
/sbin/depmod [ NA
Rootkit 'RH-Sharpe's rootkit'... [ Warning! ]
--------------------------------------------------------------------------------
Found parts of this rootkit/trojan by checking the default files and directories
Please inspect the available files, by running this check with the parameter
--createlogfile and check the log file (current file: /dev/null).
--------------------------------------------------------------------------------
Checking users with UID '0' (root)... [ Warning! (some users in root group) ]
info: adm:0
And here's the info I've found after investigation:
-bash-2.05b# pwd
/usr/local/games
-bash-2.05b# ls -lah
total 332K
drwxr-xr-x 3 root root 4.0K Feb 5 15:59 .
drwxr-xr-x 15 root root 4.0K Feb 12 19:32 ..
drwxr-xr-x 3 1555 1555 4.0K Feb 2 12:58 .fl
-rwxr-xr-x 1 root root 263K Feb 2 12:51 ettercap
-rwxr-xr-x 1 root root 17K Feb 2 12:51 parse
-rw-r--r-- 1 root root 119 Feb 2 12:51 pid
-rw-r--r-- 1 root root 27K Feb 3 17:44 x
-bash-2.05b#
i daily check my error log files to see if something was wrong , checkout what i found
the first one is probably trying to hack my site to get to my ads and changing it to them i think
[error] [client 195.23.16.24] File does not exist: /var/www/html/a1b2c3d4e5f6g7h8i9
[error] [client 195.23.16.24] script '/var/www/html/adxmlrpc.php' not found or unable to stat
[error] [client 195.23.16.24] File does not exist: /var/www/html/adserver
[error] [client 195.23.16.24] File does not exist: /var/www/html/phpAdsNew
[error] [client 195.23.16.24] File does not exist: /var/www/html/phpadsnew
[error] [client 195.23.16.24] File does not exist: /var/www/html/phpads
[error] [client 195.23.16.24] File does not exist: /var/www/html/Ads
[error] [client 195.23.16.24] File does not exist: /var/www/html/ads
this 1 I dont know
[error] [client 71.190.229.120] File does not exist: /var/www/html/_vti_bin
[error] [client 71.190.229.120] File does not exist: /var/www/html/MSOffice
[error] [client 69.181.195.171] File does not exist: /var/www/html/_vti_bin
[error] [client 69.181.195.171] File does not exist: /var/www/html/MSOffice
[error] [client 69.181.195.171] File does not exist: /var/www/html/MSOffice
This 1 is kinda keep me scared i dont know what it is either
[Mon May 21 16:11:00 2007] [error] [client 129.29.227.4] Invalid URI in request T 5.1; U; en)
[Tue May 22 15:59:09 2007] [error] [client 129.29.227.4] Invalid URI in request f705120b3663bb; yab_logined=0; yab_uid=0; yab_last_click=1179781859
[Tue May 22 16:09:15 2007] [error] [client 129.29.227.4] Invalid URI in request d14379f705120b3663bb; yab_logined=0; yab_uid=0; yab_last_click=1179867547
[Tue May 22 16:09:20 2007] [error] [client 129.29.227.4] Invalid URI in request d14379f705120b3663bb; yab_logined=0; yab_uid=0; yab_last_click=1179867547
[Tue May 22 16:09:24 2007] [error] [client 129.29.227.4] Invalid URI in request -gzip, identity, *;q=0
[Tue May 22 16:09:25 2007] [error] [client 129.29.227.4] Invalid URI in request -gzip, identity, *;q=0
[Tue May 22 16:09:25 2007] [error] [client 129.29.227.4] Invalid URI in request -gzip, identity, *;q=0
[Tue May 22 16:09:26 2007] [error] [client 129.29.227.4] Invalid URI in request -gzip, identity, *;q=0
[Tue May 22 16:09:26 2007] [error] [client 129.29.227.4] Invalid URI in request -gzip, identity, *;q=0
[Tue May 22 16:09:28 2007] [error] [client 129.29.227.4] Invalid URI in request -gzip, identity, *;q=0
[Tue May 22 16:09:29 2007] [error] [client 129.29.227.4] Invalid URI in request -gzip, identity, *;q=0
[Tue May 22 16:29:29 2007] [error] [client 129.29.227.4] Invalid URI in request f705120b3663bb; yab_logined=0; yab_uid=0; yab_last_click=1179868171
[Tue May 22 16:30:23 2007] [error] [client 129.29.227.4] Invalid URI in request d14379f705120b3663bb; yab_logined=0; yab_uid=0; yab_last_click=1179869368
[Tue May 22 16:30:26 2007] [error] [client 129.29.227.4] Invalid URI in request -gzip, identity, *;q=0
[Tue May 22 16:30:28 2007] [error] [client 129.29.227.4] Invalid URI in request -gzip, identity, *;q=0
my server hacked
24 cat /proc/cpuinfo
25 ls
26 cd /var/tmp
27 ps x
28 ls
29 mkdir .www
30 cat /proc/cpuinfo
31 cat /etc/issue
32 mkdir .ww
33 cd .ww
36 download alexscan.tar.gz
37 tar xvfz alexscan.tar.gz
38 tar xvf alexscan.tar.gz
39 cd Vek
40 ls
41 ./Vek 210
42 ls
43 cd ..
44 ./ss
45 ls
46 cd ..
47 cd .ww
48 download joker.tgz
49 tar xvfz joker.tgz
50 download flood-udp.tar
52 tar xvfz flood-udp.tar
53 tar xvf flood-udp.tar
54 perl udp.pl 72.8.131.39 0 0
55 perl udp.pl 89.42.72.6 0 0
56 perl udp.pl 83.42.64.149 0 0
57 passwd
58 ls
59 cd joker
60 ls
61 chmod +x *
62 ./x 23.12
I have a new server and I have hardened it with csf+lfd. It's about 65/70 in the cfs score.
This morning, I noted that lfd log sent me an email saying there is a SSH login via 207.210.233.128 on 10th May 2007. I am not sure whether it was a successful login or not?
Here is the output:
=================
Time: Thu May 10 01:31:52 2007IP: 207.210.233.128 (Unknown)Account: rootMethod: password authentication
========================
I know for sure that I did not login my SSH yesterday.
However, when I logged in SSH this morning, it says in telnet that my last login was from my own home computer's IP, so from that it looks like no one else has logged in SSH since last time I logged in myself.
Was my server intruded or was lfd just playing up?
Go to this page:
[url]
how I can find out what page they have changed? It is a php file with loads of includes etc. Not sure where to look! Or could it be a redirect or something?
I have a VPS running cpanel/whm on CentOS.
Everyday someone keeps coming in and deleting all my accounts. I do have them saved, but I cannot figure out how they are doing it.
I have followed the tips on the forum for locking down VPS. We have restriced SSH logins to our IP, we have checked all directories for ones that are 777 and changed them, we have moved the server to a different IP address.
Does it worth to upgrade cent os to latest version on server where is installed whm/cpanel?Could i request upgrade from cpanel support ?
View 3 Replies View Relatedwhich one do i have to choose?? and why?
my server is P4 3.6GHz HTT with 2GB RAM
So I'm interviewing with a company and when I typed in the URL to their website, I was met with a nasty surprise: a "hacked by so and so" message! However, after looking closer, I see that I had accidentally appended a period (".") to the end of the domain name, for example: http://www.example.com./
When I removed the period, the site appeared as normal. I don't know anything about the server other than it's IIS. Is there anything I can suggest to them when I go in to interview? I'd like to point this out to them; it may even help my chances at landing the job! (It's not related to networking, though.)
Now, first of all... I'm not sure if this is a problem with WHMCS or some other piece of software with a security hole, but I thought I should post here.
Our WHMCS got hacked earlier today and the hacker sent out a to be honest, unacceptable email to all clients, I won't go into detail but lets just say it directly insulted them.
Now apart from ruining our reputation and client relationships, I am now completely paranoid that it will happen again. I'd also like to know how it happened in the first place. The hacker signed up for a hosting account, and then sent the email. I have no idea how he/she did it, but when I look at the admin log in WHMCS, it shows the username "hacked" as logging in (see image).http://img378.imageshack.us/img378/2560/hackedmh9.png
Just a warning to everyone out there. His IP address was 86.132.228.82.
A client's site was hacked last week and spyware or some kind of trojan was put on it. I found some files that didn't belong in the images folder and proceeded to delete them, however, when I submitted the site back to Google for review, the report came back saying there was still malware on the site. They didn't provide me with the location of the spyware, so what can I do to find it and delete it?
View 6 Replies View Relatedwe have a vps server and someone did what I would call a calling card attack, thankfully.
It is a stock kubuntu os with stock apache. Root passwords for everything have been changed to our own
Somehow they logged into kubuntu as root and changed the htpasswd in usr/passwords (changed to protect the password).
Then since they changed the htpasswd they were able to log into phpmyadmin and changed the admin password in the database.
I'm pretty sure I know who did it and he is teaching us a lesson which I respect but he will not comunicate with us.
We have hourly snapshots of our vps and we need to know how they are getting in. See my sig and click on the hotspot login.
Looking at the sudoers there is the Defaults line that we suspect as a means to get in.
We have a great php etc... app but it is either Apache or kubuntu that they can get in.
I would like to learn about what needs to be done about security but where do I start?
Can someone help me look for something that would allow the attack?
I'm a php guy and it is not a mysql injection attack nor is it an xss attack.
I am not a kubuntu / server security guy and now need your advice.
Out of the three websites that were hacked the hacker left a get.php file in the root and i decided to see what it was and i ran it. To my shock and horror it gave me all the different types of people hosted on the server and it also gave me their database passwords etc...
Now each time i ran it, it gave me different results of different users on the server each time with a long never ending list. I just couldnt believe my eyes a simple short written php script showed me a lot.
Now im not a PHP guru but this is quite serious and ive notified my web host showing them my findings. I was quite astonished it showed me passwords in peoples configs.
Now my question is... is this something new or old and that my web hosts forgot to look into that area...? I mean its a php script thats all.
One of my clients has just sent me a bounced email to an address she had never heard of. This made me suspect my server had been hacked and was being used for a scam.
Sure enough, I found a file in one of my folders, that was related to a Bank of America scam.
I have since put a password on this folder. But does anyone have any advice on how to secure the site to prevent this happening again? It is a shopping cart and the 'rogue' file was in the admin area of the shopping cart.
SOme one has claimed that he has penetrated my server and has gathered some kind of information via shell access, I have disabled the possible ways of shell access for the users via twaek settings, and php.ini
- How I can check he has made any backdoor for himself or not?
and I have made a trojan check via Scan for Trojan Horses in WHM, and it has found about 200 possible trojans.
- How I can remove them?
217.67.250.41 - - [18/May/2009:15:36:08 +0100] "GET /w00tw00t.at.ISC.SANS.DFind HTTP/1.1" 400 226 "-" "-"
What is mean ? Sorry for ask a fast answer. I have change my domain's IP to protect someone can run dangerous script...
