• How to Create Free SSL/TLS Certificate with OpenSSL

    SSL/TLS certificate is required to encrypt data sent over internet communication. Without encryption, the sent data can be hacked by the middle man attack. SSL/TLS certificate is usually a pair key, public key and private key, solution where data is encrypted with public key and decrypted with private key. In public communication, public key is required to be signed by a CA (certificate authority) but in private communication, there is no need to be signed by any CA. If we don’t sign public key by any CA, browsers will show a warning message that the certificate is not trusted. Although browser shows waning message, the communication is encrypted and secure yet. A lot of tools are available to create self signed certificate. Among them, OpenSSL is so popular and SSL certificate can be created without any hassle. So, in this article, I will show how to create free SSL certificate with OpenSSL in Ubuntu Server. Generating Free SSL Certificate with OpenSSL OpenSSL is a free tool which can be used to generate self signed SSL/TLS certificate. OpenSSL usually comes built-in in Linux operating system. So, if you have Ubuntu Server or any other Linux operating system installed, you can easily [...]

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    Ubuntu Web Server Configuration with phpMyAdmin (LAMP Stack) |   July 12, 2021

    Ubuntu Server is one of the most popular open source operating systems that can be used in production without any hassle. In my previous article, I discussed how to install Ubuntu Server with LVM partition. I also discussed how to assign static IP address on Ubuntu Server interface with Netplan network management tool. Ubuntu web server is a popular service because web developers usually use Ubuntu Server for their development project. Besides development project, Ubuntu web server can also be [...]

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    Ubuntu Server Set Static IP Address with Netplan |   July 1, 2021

    Ubuntu Server is one of the most popular open source sever operating systems. Ubuntu Server can be used in production without any hassle. In my previous article, I discussed how to install Ubuntu Server’s latest version (Ubuntu Server 20.04) with LVM. In this article, we are going to see how to assign static IP address in Ubuntu Server with Netplan network management tool. Netplan Since Ubuntu Server 17.10, Netplan is being used as the default network management tool instead of [...]

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    Ubuntu Server 20.04 Installation with LVM |   May 28, 2021

    Linux is a free and open source operating system developed by Linus Torvalds on September 17, 1991. It is mainly used as server environment. A lot of Linux distributions are present today. Among them, Ubuntu is one of the best stable Linux distributions. Ubuntu has both Desktop and Server distribution. Ubuntu Server is a high performance and stable enterprise Linux distribution and it can be easily used in production. Ubuntu Server has both community-support and well documentation. So, IT guys can use Ubuntu [...]

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    Securing MikroTik Router with Port Knocking |   March 21, 2021

    MikroTik Port Knocking strategy helps to protect MikroTik Router from hackers and unauthorized access as well as enhances MikroTik RouterOS security.

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    How to Secure MikroTik RouterOS Login Users |   February 19, 2021

    MikroTik RouterOS is a bridge between WAN and LAN. So, it is mandatory to apply RouterOS login user security policy. Otherwise, RouterOS may so insecure.

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    Hardening MikroTik RouterOS by Limiting Login Services |   February 6, 2021

    MikroTik RouterOS is usually used as a bridge between WAN and LAN network. WAN network is always an insecure network because attackers always try to hack your RouterOS so that they can compromise it for their own benefit. As a network administrator of MikroTik RouterOS, we should always take anti hacking steps to secure our MikroTik RouterOS. There are a lot of security tasks those we should take care to secure our MikroTik RouterOS. Among these security tasks, we will [...]

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    CentOS 8 Networking Configuration Using Cockpit Web Console |   January 11, 2021

    The first task after completing CentOS 8 fresh installation is to configure its networking so that it can be accessed from other network devices. In my previous article, I discussed how to install CentOS 8 Graphical User Interface (GNOME Desktop) with step by step screenshots. If you are a new CentOS 8 user and have not yet installed CentOS 8 on your server machine, feel free to follow that article and install CentOS 8 GNOME Desktop according to the article. [...]

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    How to Install VMware ESXi VMvisor on VMware Workstation |   December 28, 2020

    There is no doubt that VMware vSphere is the pioneer in virtualization world. Day by day IT infrastructure is converting to virtualization where VMware vSphere is providing more features than any other virtualization software. VMware ESXi is the foundation of VMware vSphere. VMware ESXi is a bare metal hypervisor. So, a physical server is required to install VMware ESXi. Physical servers are usually costly and beginners or researchers cannot always arrange such a high priced physical server to install ESXi [...]

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    CentOS 8 Networking Configuration Using nmtui Tool |   December 14, 2020

    The first task after completing CentOS 8 fresh installation is to configure its networking so that it can be accessed from other network devices. In my previous article, I discussed how to install CentOS 8 Graphical User Interface (GNOME Desktop) with step by step screenshots. If you are a new CentOS 8 user and have not yet installed CentOS 8 on your server machine, feel free to follow that article and install CentOS 8 GNOME Desktop according to the article. [...]

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