How To Install portsentry on Ubuntu 22.04
Introduction
In this tutorial we learn how to install portsentry on Ubuntu 22.04.
What is portsentry
portsentry is:
PortSentry has the ability to detect portscans(including stealth scans) on the network interfaces of your machine. Upon alarm it can block the attacker via hosts.deny, dropped route or firewall rule. It is part of the Abacus program suite.
Note: If you have no idea what a port/stealth scan is, It’s recommended to have a look at http://sf.net/projects/sentrytools/ before installing this package. Otherwise you might easily block hosts you’d better not (e.g. your NFS-server, name-server, etc.).
There are three methods to install portsentry on Ubuntu 22.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install portsentry Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install portsentry using apt-get by running the following command:
sudo apt-get -y install portsentry
Install portsentry Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install portsentry using apt by running the following command:
sudo apt -y install portsentry
Install portsentry Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install portsentry using aptitude by running the following command:
sudo aptitude -y install portsentry
How To Uninstall portsentry on Ubuntu 22.04
To uninstall only the portsentry package we can use the following command:
sudo apt-get remove portsentry
Uninstall portsentry And Its Dependencies
To uninstall portsentry and its dependencies that are no longer needed by Ubuntu 22.04, we can use the command below:
sudo apt-get -y autoremove portsentry
Remove portsentry Configurations and Data
To remove portsentry configuration and data from Ubuntu 22.04 we can use the following command:
sudo apt-get -y purge portsentry
Remove portsentry configuration, data, and all of its dependencies
We can use the following command to remove portsentry configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge portsentry
References
Summary
In this tutorial we learn how to install portsentry package on Ubuntu 22.04 using different package management tools: apt, apt-get and aptitude.
