How To Install knock-server on CentOS 7

Introduction

In this tutorial we learn how to install knock-server on CentOS 7.

What is knock-server

Knock 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 knockd server.

We can use yum or dnf to install knock-server on CentOS 7. In this tutorial we discuss both methods but you only need to choose one of method to install knock-server.

Install knock-server 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-server using yum by running the following command:

sudo yum -y install knock-server

Install knock-server 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-server using dnf by running the following command:

sudo dnf -y install knock-server

How To Uninstall knock-server on CentOS 7

To uninstall only the knock-server package we can use the following command:

sudo dnf remove knock-server

References

• knock-server website

Summary

In this tutorial we learn how to install knock-server on CentOS 7 using yum and dnf.