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Computer Networking Basics
Computer networking is a buzzword to the present world. By the virtue of computer networking, the world has become just like a village. So, anyone of the world can communicate with any person of the world within seconds as if they are living in a village. Computer networking does not mean a single element. A lot of networking elements and protocol work behind a computer networking. So, the computer guys who are interested to learn how computer networking works should learn the basic elements and protocol of computer networking. In this article, I will explain some basic networking terms which are frequently used in computer networking. If you are a beginner in computer networking and want to be a network administrator, you should understand these basic networking terms clearly. So, keep reading the rest of this article. I hope, it will be helpful for you. What Is a Computer Network? A computer network is nothing but some rules and regulations used to connect computers together. These computers may have at a small distance or large distance. Basically, a computer network is all of the components (Hardware, Cabling, Network Devices and Software) which are involved in connecting computers. The purpose of [...]
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Unlocking Digital Opportunities: A Beginner’s Guide to Computer Networking | October 14, 2025
Summary Computer networking has created the digital world, enabling communication networks that unite various regions of the world and connect any device in some way or another. Networking provides new opportunities to secure employment, act as freelance workers, or even pursue volunteer work, which is why it is worth investing in for career development. Being practical should be valued even more than theory. Even after setting up a home lab, reviewing real projects, and consulting trusted sources, you will learn [...]
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MikroTik Site to Site GRE Tunnel Configuration with IPsec | March 26, 2018
VPN (Virtual Private Network) is a technology that provides a secure tunnel across a public network. A private network user can send and receive data to any remote private network using VPN Tunnel as if his/her network device was directly connected to that private network. MikroTik provides GRE (Generic Routing Encapsulation) tunnel that is used to create a site to site VPN tunnel. GRE tunneling protocol which can encapsulate a wide variety of protocols creating a virtual point-to-point link was [...]
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Managing Disk Partition with the parted Tool in CentOS 7 | March 2, 2019
As a system administrator, sometimes you may require to manage partitions of your CentOS/Red Hat Linux Operating System. Partition management is always a risky task. But there are some useful tools those are so helpful to manage CentOS/Red Hat Linux disk partition easily. In my previous article, I discussed how to manage CentOS/Red Hat 7 HDD partitions with the fdisk utility. The fdisk tool is only eligible to manage MBR partition table. But GPT partition table is now becoming more [...]
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FreeRADIUS User Group Management with MySQL | January 3, 2019
FreeRADIUS is a high performance RADIUS Server. A number of network devices can be used with freeRADIUS Server as a RADIUS Client including MikroTik Router. As a modular RADIUS suite, freeRADIUS accepts MySQL module to query user authentication and authorization and to store accounting data. In my previous article, I discussed how to install and configure FreeRADIUS MySQL module. I also discussed how to authenticate MikroTik Login with freeRADIUS MySQL user. In this article, we will talk about how to [...]
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How to Create Free SSL/TLS Certificate with OpenSSL | July 23, 2021
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 [...]
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MikroTik Blocking All Websites Except a Few Websites | May 7, 2019
A few days ago, someone asked me how to block all websites except one with MikroTik Firewall. For this, I have decided to discuss about blocking all websites except someone’s whitelist. Unlike firewall devices, MikroTik Firewall by default allows all websites. So, if you need to block any website, you have to create a firewall rule that will block the specific website. Now if we want to block all websites and want to allow a few websites, we have to [...]
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Red Hat/CentOS Network Configuration | August 4, 2017
Red Hat/CentOS network configuration or IP configuration is an important task to a Linux system administrator. After completing RedHat 7/ CentOS 7 fresh installation, you have to first configure your system network so that it can communicate to other network devices. In my previous article, I discussed how to install CentOS 7 core packages successfully on your physical machine. If you are a new CentOS 7 user and yet you have not installed CentOS on your machine, feel free to study [...]
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How to Block Free Proxy Access with MikroTik Router | May 21, 2019
Proxy Server is an alternative to VPN that breaks blocking firewall of a network. If any user uses free web proxy server with web browser, the web request is processed by the proxy server. So, blocking firewall rule is not applied on the proxy enabled PC. For this, system administrators should be careful enough to block free proxy servers along with blocking VPN access. In my previous article, I discussed how to block VPN access with MikroTik Firewall. In this [...]
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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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