ssh brute force
location: ubuntuforums.com - date: February 7, 2011
can someone explain this for me:
I tried to make a dynamic DNS entry in dyndns.org so I can ssh my machine from the internet. and I choose (lets say) mosab.dyndns.org.
I installed the software that updates my ip address and configured my router to forward port 22 to my local linux machine. and I configured that correctly.
after all the efforts it seems that the router DOES NOT forward the ssh request to my local machine.. when I ssh mosab.dyndns.org I reach my router and I can access it. any way I tried and I tried then I gave up thinking that my router has a problem.
today I went through my /var/auth.log and I noticed that some one is trying to access my local machine by ssh.. and its a software I guess cause its trying all usernames and all password and it fails.
my question is that if my attempts to access my local machine from the internet failed.. how this software or person reaches my machine????
This is a very small sample of the tries:
my server is attempting to ssh brute force...
location: ubuntuforums.com - date: December 7, 2012
I just received notice from a sysadmin that my server was attempting some good ole brute force SSH attacks last night. My question to you is how do I start looking into this to see what was happening?
I know how to check things out as the receiving end of one of these attacks, but never as the instigating machine. (obviously I was NOT attempting to brute force anyones network, this is malicious and done without my knowledge)
can you point me to any log files or specefic entries that i should be looking for?
SSH Brute Force Attack?
- date: February 3, 2011
This may be the opposite of what normally is asked but...
I recently installed a solar system on my house. It comes with a device that takes the readings from my solar panels and passes them out to the internet.
(I know that is from Win 7, but I'm at work.)
The device runs a micro linux system with an Apache server so one can do administration. I ran nmap against it and found out it runs Debian.
21:20 Pacific Standard Time Scanning 192.168.0.100 [1 port]
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 3.8.1p1 Debian 8.sarge.4
80/tcp open http?
MAC Address: 00:1D:C0:04:15:00 (Enphase Energy)
OS details: Linux 2.6.9 -2.6.31 Enphase Envoy -Products -Enph
When trying to ssh into the device, I run across a roadblock. I'm unable to login.
login as: kai
Linux proxy 2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 22:02:19 UTC 2010 i686 GNU/Linux
Ubuntu 10.04.2 LTS
Welcome to Ubuntu!
* Documentation: https://help.ubu
SSH Brute Force
location: ubuntuforums.com - date: November 22, 2008
I have a demo hardware device coming into the office next week. It runs on linux, and it is the first of its kind. I wanted to see if I could gain SSH access and poke around a bit. Anyone know of a good brute force dictionary attacker for SSH?
ssh brute force attacks
location: ubuntuforums.com - date: May 16, 2008
Reminded me of an issue I had at work a year ago I implemented shellter and more or less forgot about it. Before I implemented it I was getting hit 1000 times a day or more with ssh attempts now I am down to 20 a day.
I would expect to find before too long that something along the lines of shellter http://shellter.sourceforge.net/ or Brute Force Detection http://www.rfxnetworks.com/bfd.php will be installed by default with open-ssh
with all distros. Is this in the plans for ubuntu? Could we have someone take a look into it please? Thank you.
SSH brute force attack blocking?
location: ubuntuforums.com - date: May 3, 2008
there is someone/or more than one from several IP's who are trying to access my system via the SSH, very rapidly, is there anyway to block IP's for a certain amount of time if they didnt managed to log-in lets say,for example, after 3 times??
ssh brute force, how do they work?
location: linuxquestions.com - date: March 10, 2006
Could someone please explain me how the brute force attacks on my ssh server are supposed to work? Ssh still asks for a password even though the username is unknown. That would mean that the attacker, when going through his alphabetical list of usernames, won't know if any of the usernames was correct or not. That again would mean that to successfully gain access through a brute force attack he would need to go through all possible usernames combined with all possible passwords, wouldn't it?
That would take a zillion tries and a lot of time, so why are people still bothering to attack my box for ten minutes, going through the alphabetical list once, and then stop? Can they deduce usernames somehow or are they just plain stupid?
ssh brute force attempts
location: linuxquestions.com - date: June 3, 2006
What could I do to press charges against some fscker that tryed to brute force his way into my sshd(which btw dosent use password to auth)
Here is a netstat output, when the attack was happening...
tcp 0 0 me.:ssh andrejko.ics.upjs:46093 TIME_WAIT
tcp 0 0 me.:ssh andrejko.ics.upjs:46926 TIME_WAIT
tcp 0 0 me.:ssh andrejko.ics.upjs:47241 TIME_WAIT
tcp 0 0 me.:ssh andrejko.ics.upjs:46507 TIME_WAIT
tcp 0 0 me.:ssh andrejko.ics.upjs:46823 TIME_WAIT
tcp 0 0 me.:ssh andrejko.ics.upjs:46406 TIME_WAIT
tcp 0 0 me.:ssh andrejko.ics.upjs:46305 TIME_WAIT
tcp 0 0 localhost:38854 localhost:smtp TIME_WAIT
tcp 0 0 me.:ssh andrejko.ics.upjs:46719 TIME_WAIT
tcp 0 0 me.:ssh andrejko.ics.upjs:47134 TIME_WAIT
tcp 0 132 me.:ssh laptop:1041 ESTABLISHED
tcp 0 0 me.:ssh andrejko.ics.upjs:47033 TIME_WAIT
tcp 0 0 me
LXer: A Couple of SSH Brute Force Compromises
location: linuxquestions.com - date: July 28, 2013
Published at LXer:
One common and stupidly simple way hosts are compromissed is weak SSH passwords. You would think people have learned by now, but evidently there are still enough systems with root passwords like 12345 around to make scanning for them a worthwhile exercise. As a result, one of my favorite honeypot tools is kippo, and we have talked about the tool before.
Strange SSH brute force (many "Received disconnect [preauth]")
location: linuxquestions.com - date: October 28, 2012
while having a look at a public machine's secure log, I found this:
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