Fail2ban is an intrusion prevention framework written in the Python programming language. How does it work Fail2ban scan log files and bans IPs that show the malicious signs: too many password failures, seeking for exploits, etc. Generally Fail2Ban then used to update firewall rules to reject the IP addresses for a specified amount of time, although any arbitrary other action could also be configured. Out o ...

How to restrict SSH login and authorize it only to specific group. This setup was done on Ubuntu 10.04 Lucid First make sure that you have or created users other than root Adding a new username "adminuser" sudo adduser adminuser Now edit the group file to add this user to the sudoers and to our new group ssh_access that will be authorized to access via SSH sudo vim /etc/group Add or edit these line to fit t ...