How To Install knock on CentOS 7
Introduction
In this tutorial we learn how to install knock on CentOS 7.
What is knock
This is a port-knocking server/client. Port-knocking is a method where a server can sniff one of its interfaces for a special “knock” sequence of port-hits. When detected, it will run a specified event bound to that port knock sequence. These port-hits need not be on open ports, since we use libpcap to sniff the raw interface traffic. This package contains the knock client.
We can use yum or dnf to install knock on CentOS 7. In this tutorial we discuss both methods but you only need to choose one of method to install knock.
Install knock on CentOS 7 Using yum
Update yum database with yum using the following command.
sudo yum makecache
After updating yum database, We can install knock using yum by running the following command:
sudo yum -y install knock
Install knock on CentOS 7 Using dnf
If you don’t have dnf installed you can install DNF on CentOS 7 first.
Update yum database with dnf using the following command.
sudo dnf makecache
After updating yum database, We can install knock using dnf by running the following command:
sudo dnf -y install knock
How To Uninstall knock on CentOS 7
To uninstall only the knock package we can use the following command:
sudo dnf remove knock
References
Summary
In this tutorial we learn how to install knock on CentOS 7 using yum and dnf.
