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Hello folks, welcome to this very tutorial on how to create locally-trusted development SSL certificates on Ubuntu 18.04 using the mkcert utility. mkcert is a simple zero-config tool that is used to make locally trusted development certificates. It automatically creates and installs a local CA in the system root store, and generates locally-trusted certificates. Using certificates from real certificate authorities (CAs) for...

In our previous article, we learnt how to encrypt files and directories on Ubuntu 18.04 using eCryptfs.  The whole process of decrypting the directories is a bit old school and therefore, we bring you the easiest ways to decrypt the eCryptfs encrypted directory. We will discuss two ways of doing this; Using bash script to automate the whole mount procedure...

Encryption is the process in which a plain text data, a message or information, is converted to a random and meaningless data, commonly known as ciphertext. Encrypted data can only accessed by authorized parties while those who are not authorized cannot access it. There are several methods of encrypting data in Linux for example EncFS, eCryptFS for filesystem level encryption,...

In this tutorial, we are going to learn how to install and use 7zip utility, a free and open-source file archiver, on Ubuntu 18.04. 7-Zip is a file archiver with a high compression ratio. The program supports 7z, LZMA2, XZ, ZIP, Zip64, CAB, RAR, ARJ, GZIP, BZIP2, TAR, CPIO, RPM, ISO, most filesystem images and DEB formats. Compression ratio in...

In this guide, we are going to learn how to configure Nagios Availability Monitoring on AlienVault USM/OSSIM. We will cover how to configure host as well as service availability monitoring. Host monitoring reports whether an asset is up or down while Services monitoring discovers services on an asset and monitors their availability. AlienVault uses Nagios by default for host availability...

In our previous tutorial, we learnt how to install Nagios NRPE Agent on RHEL/CentOS/Oracle Linux. Well, for NRPE to collect various performance metrics on the system, it requires the Nagios plugins. Step through this guide in order to install Nagios Plugins. Download Nagios Plugins Source code Download the latest version of Nagios plugins from here. You can simply run the following...

Nagios Remote Plugin Executor (NRPE) is used to remotely execute Nagios plugins on Linux/Unix machines. This makes it easy to monitor remote machine metrics such as disk usage, CPU load, number of running processes, logged in users etc. In this tutorial, we are going to learn how to install and configure NRPE from source for use with Nagios Server. You...

NSClient++ is a monitoring agent/daemon for Windows systems that makes it easier to collect performance metrics by Nagios. In this tutorial, we are going to learn how to install and configure NSClient++ nagios monitoring agent for Windows systems. Follow through the following steps to install NSClient++. Download NSClient Agent Download the latest version of NSClient from here. Agent Installation Once the download is done,...

In our previous article, we covered how to install and setup Nessus on Linux System. In this tutorial, we are going to learn how to scan a target host for Vulnerabilities with Nessus vulnerability scanner. Create New Scan To create a new scan, login to Nessus web UI and click Scans tab in the top navigation bar. This opens My Scans folder...

Identifying vulnerabilities is the first step towards securing your environment. Nessus is the de-facto industry standard vulnerability assessment solution. It helps to easily identify and fix vulnerabilities - including software flaws, missing patches, malware, and misconfigurations across a variety of operating systems, devices and applications. In this tutorial, we are going to learn how to install, setup and use Nessus...