LinuxQuestions.org
Did you know LQ has a Linux Hardware Compatibility List?
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Security
User Name
Password
Linux - Security This forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.

Notices



Reply
 
Search this Thread
Old 10-10-2013, 11:09 AM   #16
dive
Senior Member
 
Registered: Aug 2003
Location: UK
Distribution: Slackware
Posts: 3,211

Rep: Reputation: 293Reputation: 293Reputation: 293

So there ought to be a setting somewhere that allows or blocks open relaying. It needs fixing. This is one of the big reasons we have spam: because people without a clue set up a mail server for anyone out there to find and use.

Last edited by dive; 10-10-2013 at 11:10 AM.
 
Old 10-10-2013, 06:03 PM   #17
kingkashif
Member
 
Registered: May 2009
Posts: 92

Original Poster
Rep: Reputation: 16
Quote:
Originally Posted by Habitual View Post
More often that not on (some)Panel products, it is a user's credentials that are compromised.

I'd check the logs for rapid and varied connections from diverse IPs for your clients by their login name or loginID.
Any idea what logs exactly should I check for these varied connections from diverse IPs?
As I know the server is not open relay or anything. Also there aren't other sites hosted on the server. Just our own site which is highly unlikely to have any vulnerability or code as it's just a two page site.

About 50 people have their mail account on this server and I think you are right their credentials might have been compromised.
I could tell all these to change their passwords but I want to find out who exactly has been compromised.

Last edited by kingkashif; 10-10-2013 at 06:04 PM.
 
Old 10-16-2013, 02:34 AM   #18
unSpawn
Moderator
 
Registered: May 2001
Posts: 27,822
Blog Entries: 54

Rep: Reputation: 2991Reputation: 2991Reputation: 2991Reputation: 2991Reputation: 2991Reputation: 2991Reputation: 2991Reputation: 2991Reputation: 2991Reputation: 2991Reputation: 2991
Did you get any results yet?
 
Old 10-16-2013, 08:22 AM   #19
Habitual
Senior Member
 
Registered: Jan 2011
Distribution: Undecided
Posts: 3,622
Blog Entries: 1

Rep: Reputation: Disabled
Quote:
Originally Posted by kingkashif View Post
Any idea what logs exactly should I check for these varied connections from diverse IPs?
As I know the server is not open relay or anything. Also there aren't other sites hosted on the server. Just our own site which is highly unlikely to have any vulnerability or code as it's just a two page site.

About 50 people have their mail account on this server and I think you are right their credentials might have been compromised.
I could tell all these to change their passwords but I want to find out who exactly has been compromised.
Security is a Process, not a package.
I would just implement Plesk Mass Password Reset Script and call it "Ongoing Security"
or "Routine Security".

If it continues to happen after resetting ALL passwords, then I'd investigate individual accounts to find a repeat offender.
Chances are someone has never changed an easily-guessed or stolen-by-malware account information.

See also, Parallels Plesk Panel security best practices

Your first line of defense, IMO should be http://kb.parallels.com
 
1 members found this post helpful.
Old 10-16-2013, 10:31 AM   #20
YankeePride13
Member
 
Registered: Aug 2012
Distribution: Ubuntu 10.04, CentOS 6.3, Windows 7
Posts: 228

Rep: Reputation: 51
Quote:
Originally Posted by kingkashif View Post
As I know the server is not open relay or anything.
This is an easy thing to check: http://mxtoolbox.com/diagnostic.aspx
 
Old 10-16-2013, 12:42 PM   #21
Habitual
Senior Member
 
Registered: Jan 2011
Distribution: Undecided
Posts: 3,622
Blog Entries: 1

Rep: Reputation: Disabled
Quote:
Originally Posted by kingkashif View Post
I want to find out who exactly has been compromised.
Additional advice...
Start by changing your password(s).
 
1 members found this post helpful.
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
What is the best way to investigate I/O performance issues? gdtm86@gmail.com Linux - Newbie 5 06-06-2012 08:51 PM
[DO NOT REPLY] dnsmasq not resolving. How to investigate? catkin Linux - Networking 1 02-12-2010 11:01 PM
How to investigate a shutdown which is not working? ade05fr Linux - General 2 12-21-2007 05:35 AM
How to investigate a system lockup kvtournh Linux - Security 2 12-09-2005 06:48 AM
Mandrake 10, no sound - how do I investigate? owain Linux - Newbie 6 04-17-2004 06:49 PM


All times are GMT -5. The time now is 06:14 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration