Ossec - log ssh brute force attack NOT WORK!
Hello to heverybody!
(Howtoforge is the 1st my forum website! - A beautiful community!)
On the my local vps i have a problem about the log and notification with OSSECC monitor of SSH brute force attack.
In the first time, there was a problem , a bug, with the bad ownership of btmp that create a strange log report about login failure
sshd: Excess permission or bad ownership on file /var/log/btmp
After i have "solved" with the change of permissions and ownership of btmp file,
chmod 600 /var/log/btmp
but now, when there is a login failure, only from unknow user of the system, there is not any log of the failure login and obviously OSSECC dont notify me an event that not exist!
If a know user perform a bad login the system notify correctly the failure login.
I have tested this, with a simulation of ssh bruteforce attack.
If there is any idea, i will be happy!
Did you check all log files?
oh yes i can check all,
and ossec notify me all alerts logged.
("i have checked, there are not rootkit or suspicios connection or listening process" ;) )
I have been verified also ..that the ssh chroot enviroment, use another openssl & ssh-chroot version in other path directory of default ssh configuration.
When you to log in with an unknown user, there's absolutely nothing in the logs? :confused:
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