Implementing new security measures will be of great help in improving the levels of availability and privacy in any operating system since we will be creating tasks that are ready to face any threat, both internal and external, in the system..
One of the attacks at the network level that may be more critical are SSH attacks which use secure connections, which are difficult to detect and thus can penetrate the network and there do any malicious action that affects its optimal behavior.
Today in TechnoWikis we will analyze an application that has been developed to create a filter that prevents attacks of this type and is the DenyHosts tool..
To get an idea of ​​the number of attacks of this type that we can receive, just look at the / var / log / secure directory in RedHat or CentOS 7 or the /var/log/auth.log directory in Ubuntu or Debian and we'll see what next:
Although these were simply attempts, in case anyone can access the system we could face a really critical security situation.
In these cases it is useful to implement the DenyHosts solution to help us manage this type of access and avoid unpleasant surprises in our management task..
sudo apt install denyhosts
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