There are many different methods of securing a publicly accessible server, and one of the best things a system administrator can do is use fail2ban to dynamically block potential attackers before they can do any damage.
Since we recently learned about basic Linux firewalls, I figured that it would be good to cover some more advanced firewall topics. There are a lot of settings that we can use to allow or deny specific traffic from specific hosts. So, let’s jump right in and take a look!
One of the first tasks that should be accomplished when deploying a new server (and in reality, any new machine) is setting up a software firewall. On a Linux computer, this is accomplished using iptables. We can use the /sbin/iptables command to manipulate our firewall, or we can directly edit the /etc/sysconfig/iptables file. Each has […]