Configure OpenVPN Clients to use specific DNS Server

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This is a quick tutorial on how to configure OpenVPN clients to use specific DNS server. OpenVPN server can be configured to enable the clients to use specific DNS server for hostname resolution. In our previous tutorials, we have covered how to install and configure OpenVPN server; Install OpenVPN Server on Debian 11/Debian 10 Configure OpenVPN Clients to use specific DNS Server To...

Install and Setup GVM 11 on Ubuntu 20.04

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In this guide, we are going to learn how to install and setup GVM 11 on Ubuntu 20.04. Greenbone Vulnerability Management (GVM), was previously known as OpenVAS, is a network security scanner which provides a set of network vulnerability tests (NVTs) to detect security loopholes in systems and applications. As of this writing, GVM 11 is the current stable release. Well, GVM...

Install GVM 21.4 on Kali Linux

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Install GVM 21.4 on Kali Linux
In this guide, you will learn how to install GVM 21.4 on Kali Linux. Greenbone Vulnerability Management (GVM), previously known as OpenVAS, is a network security scanner which provides a set of network vulnerability tests (NVTs) to detect security loopholes in systems and applications. As of this writing, GVM 21.4.4 is the current stable release. Install GVM 21.4 on Kali Linux Prerequisites In this demo, we will...

Configure CentOS/Rocky/Oracle Linux as a Linux Router

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Configure CentOS/Rocky/Oracle Linux as a Linux Router
Follow through this guide to learn how to configure CentOS/Rocky/Oracle Linux as a Linux Router. A router is a device that connects two or more IP networks or subnetworks. Linux can be configured as a default gateway to route traffic between networks. Configure CentOS/Rocky/Oracle Linux as a Linux Router In this tutorial, we will be basing our configuration on this sample...

Install Fleet Osquery Manager on Rocky Linux

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Install Fleet Osquery Manager on Debian 10
In this tutorial, you will learn how to install Fleet osquery manager on Rocky Linux. According to its Github repository, "Fleet is the most widely used open source osquery manager. Deploying osquery with Fleet enables programmable live queries, streaming logs, and effective management of osquery across 50,000+ servers, containers, and laptops. It's especially useful for talking to multiple devices...

Install GRR Incident Response Framework on Ubuntu 18.04

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Install GRR Incident Response Framework
Hello folks. Today we are going to learn how to install GRR incident response framework on Ubuntu 18.04. Google Rapid Response (GRR) is a python based incident response framework that focuses on live forensics and investigations. It enables security analysts to examine and attacks and perform analysis remotely. GRR is deployed in a server-client architecture. The GRR server provides a...

Automount LUKS Encrypted Device in Linux

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automount LUKS encrypted device in Linux on system startup
In this tutorial, you will learn how to automount LUKS encrypted device in Linux on system startup. Unless you configure the device to automount, it usually doesn't by default. However, if you enabled device encryption with LUKS during system install, the automount is usually setup and the device automatically mounts once you supply the correct drive encryption passphrase. Please note...

Setup OpenVPN Server on Rocky Linux 8

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In this guide, we are going to learn how to install and easily setup OpenVPN Server on Rocky Linux 8. OpenVPN is a robust and highly flexible open-source VPN software that uses all of the encryption, authentication, and certification features of the OpenSSL library to securely tunnel IP networks over a single UDP or TCP port. It facilitates the extension of...

Install and Setup Squid Proxy on Debian 11/Debian 10

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squid proxy
In this tutorial, we are going to learn how to install and setup Squid Proxy on Debian 11/Debian 10. Squid is a full-featured web proxy cache application which provides proxy and cache services for HTTP, FTP, SSL requests and DNS lookups. It also performs transparent caching that reduces bandwidth and improves response time by caching and reusing frequently requested web pages. Install...

WordPress: Fix Updating failed. The response is not a valid JSON response

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Fix Updating failed. The response is not a valid JSON response.
In this tutorial, I will show you a quick fix to the common WordPress error, Updating failed. The response is not a valid JSON response related to default Gutenberg editor. Note that I experienced this issue while adding a specific block of text on WordPress post. Whenever i tried to save the post after adding that block, it always resulted...