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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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How to Prevent Simultaneous User Login in MikroTik Hotspot | November 10, 2020
MikroTik Hotspot is a user based internet access system. Most of the user authentication and authorization can be controlled with MikroTik Hotspot. But sometimes some users misuse user based authentication system. Misusing simultaneous login is one of them. Usually we provide one username and password for a user and we expect he/she will use this username and password from only one device at a time. But it is also possible to use same username and password in multiple devices at [...]
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DNS Server Configuration on CentOS 7 (Caching DNS with BIND) | June 24, 2019
DNS (Domain Name System) Server is an essential part to any computer network. Today web communication cannot imagine without DNS Server. DNS is a client server protocol where DNS Client requests for the domain name resolution and DNS Server response on it. Every network should have a DNS Server because local DNS Server improves network performance by caching DNS information and serving DNS request locally. DNS Server can be configured either Windows or Linux operating system. In this article, I [...]
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Firewalld Installation and Configuration in Ubuntu Server | May 5, 2022
Firewalld is an awesome host based firewall management tool for Linux Operating System. Firewalld has developed on Fedora but it is now available for almost all Linux distributions. So, Firewalld can be installed in Ubuntu Server although Ubuntu Server has UFW as the default firewall system. Firewalld is more robust and easy to maintain than UFW, I think. So, I am going to discuss how to install and configure Firewalld in Ubuntu Server. Installing Firewalld in Ubuntu Server By default [...]
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MikroTik Radius Configuration with FreeRADIUS | December 7, 2018
FreeRADIUS is a high performance RADIUS suite that provides authentication, authorization and accounting facility for a large number of network devices including MikroTik Router. Although MikroTik has user manager RADIUS service to provide authentication, authorization and accounting facility but it is not free for customization and not suitable for medium to large organization. On the other hand, freeRADIUS is free for customization according to your organization requirements. But freeRADIUS has to be customized by you. In my previous article, I [...]
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MikroTik Router Bandwidth Management | September 3, 2015
MikroTik is one of the most popular routers in computer networking. It is said that no office or ISP company cannot go a single day without MikroTik Router. MikroTik Router is also a popular router to a network administrator because MikroTik Router is easily maintainable with graphical user interface software named winbox than other routers. A lot of services are available in MikroTik router to run a network smoothly. Among these services, Bandwidth Management Service is the most popular service in [...]
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CentOS 7.5 Installation with GUI and LVM Partition | March 7, 2019
Red Hat/CentOS Linux is a popular server operating system. Specially who work on mail server, web server, web proxy server, ftp server and file server are so familiar with the Red Hat/CentOS Linux. In my previous article, I discussed how to install CentOS 7.5 Linux step by step with the standard partition. But if you want to work on mail server, web proxy server, ftp server, file server or any other application where disk space changes frequently, the standard partitioning [...]
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HTTP vs. HTTPS: The Impact Of Using SSL Certificates | November 29, 2021
Google and cybersecurity experts continue to make clarion calls to web admins and website owners to switch from HTTP to HTTPS. But is there any difference between the two other than the extra “S” at the end of HTTPS? Not everyone understands the differences between HTTP and HTTPS and why the difference is so significant. In this post, we will discuss the differences between HTTP and HTTPS, the reasons why you need to switch from HTTP to HTTPS, and the [...]
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CentOS 7.5 Installation Step by Step with GUI (GNOME Desktop) | August 15, 2018
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, Red Hat Linux is used as enterprise Linux. Red Hat is also known as Red Hat commercial Linux that means Red Hat is a paid service program. CentOS (Community Enterprise Operating System) is another Linux distribution that provides a free and open source, enterprise-class, community-supported server platform functionally compatible with [...]
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MikroTik Hotspot Customization | April 5, 2017
Hotspot is one of the most popular services in MikroTik router. MikroTik Hotspot Gateway is a policy to authorize network clients before to access local network resources as well as public network resources through MikroTik router. In a Hotspot network, the user can login or authenticate using almost any web browser, so there is no need to install any additional software to client end. As Hotspot login prompt is a webpage, Hotspot service can effectively be used as an advertising medium of [...]
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