[deanhills]

fail2ban?? well can you tell me more about it ?.. i'll try it out, after i know which this fail2ban used for
thanks for tutorial

Tutorials are very easy to Google.  The tutorial below look like a good one for installing fail2ban on CentoS.  If you have a different OS you could Google it for a different OS:
https://www.howtoforge.com/tutorial/how-...on-centos/

BTW I've got fail2ban installed by default through my VestaCP, which is a free panel that I like very much because it is very light on resources and easy to install.  Good part about it is that when it installs fail2ban it does it in such a way that you don't need to go in and configure it. But you can tweak it if you want to block IPs.

[Vuluts]

@youssefbasha Debian and Ubuntu are same distro so you can use Debian tutorial posted into your Ubuntu system.