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DNS Server Configuration on CentOS 7 (Caching DNS with BIND)
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 will discuss how to configure a caching DNS Server on CentOS 7/ RedHat 7 Linux with BIND9 Service. Domain Name System (DNS) and How It Works Communication between a workstation (PC) and a Server are always done by IP address. So, to get any information from any Web Server, you have to remember the IP address of that Server. But remembering a huge number of public IP addresses is almost impossible for the human being. To solve this issue, DNS technique is introduced in computer networking. The DNS technique can be best compared to a phone book where a user finds a phone number listed by the easier-to-remember name. So, the DNS can be defined as a mapper between human [...]
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How to Add New Domains to BIND DNS Server | July 5, 2019
DNS (Domain Name System) Server is an essential part to any computer network. So, it is always suggest keeping a DNS Server in every network. How to configure a DNS Server with BIND package was discussed in my previous article. A common question among the fresher admins of BIND DNS is how to add a new domain to BIND DNS Server. For this, this article is designed to discuss the proper way to add multiple domains to BIND DNS Server. [...]
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Getting Started with Red Hat Linux | May 20, 2017
Red Hat Linux is an open source server operating system. Although open source Red Hat is a commercial Linux distribution. So, most of the Linux administrators use CentOS because CentOS is a free and open source, enterprise-class and community-supported server platform as well as it is functionally compatible with Red Hat Enterprise Linux. In my previous article, I showed how to install CentOS 7 core packages in your server machine. Today I will introduce you with Red Hat Linux’s command [...]
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MikroTik RADIUS Server (User Manager) Installation | October 28, 2017
RADIUS Server is a centralized user authentication, authorization and accounting application. RADIUS authentication gives the ISP or network administrator ability to manage PPP users, login users and Hotspot users from one server throughout a large network. MikroTik RouterOS has a RADIUS client that is able to authenticate login users, Hotspot users and PPP users through a RADIUS server. MikroTik team also developed a totally separate RADIUS server package named User Manager that can be used to authenticate MikroTik users smoothly. [...]
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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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5 Factors That Affect the VPN Speed | July 6, 2021
So you have finally decided to use VPN services. While it’s a great option you must have your concerns. One of these must be the VPN slowing down at times. If that’s the case then it’s better to know the reasons and to explore the issue prior buying or using a free VPN service. Whether you own a fashion brand or a company that teaches coding to beginner kids, many companies use VPN to provide its employees with a closer [...]
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Reset Mozilla Firefox to Default Settings | August 26, 2015
Mozilla Firefox is a free and open source web browser developed Mozilla Corporation. Mozilla Firefox is available for most of the popular operating system like Windows, macOS and Linux operating system. It is also a default web browser in Linux operating system. Mozilla Firefox is a popular web browser to any online user. It is said that no online user can go a single day without this Browser. I am also a fan of Mozilla Firefox browser and using this [...]
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MikroTik PPPoE Server with Radius User Authentication | December 17, 2017
MikroTik PPPoE Server is popularly used in ISP Companies. Almost all Local ISP Companies use PPPoE service to manage their client’s connection. So, PPPoE Server Configuration places an important role in MikroTik RouterOS. MikroTik PPPoE Server configuration with local user database has been discussed in my previous article that is enough to manage PPPoE users for a single RouterOS. But if you have more than one RouterOS in your network or you need to manage your users remotely and more [...]
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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 Multiple SSID with Separate LAN and DHCP Server | October 30, 2019
One of the most amazing features of MikroTik Wireless Router is creating Multiple SSID (Virtual AP) on a physical wireless interface. So, creating a Guest WiFi AP with separate LAN block, SSID and DHCP Server is so easy using MikroTik WiFi AP Router. In the previous article, I discussed how to configure MikroTik WiFi Access Point on physical wireless interface with DHCP Server using hAP Lite (RB941-2nD) Wireless Router. In this article I will discuss how to configure a Virtual [...]
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