dns server configuration in rhel 7

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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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    Port Based Apache Virtual Hosting on RHEL 7 |   July 26, 2019

    Virtual Hosting is a method of hosting multiple domains on single web server. If you have multiple domains (such as domain1.com, domain2.com and so on) and want to host on single web server, Virtual Hosting is your right choice. Apache web server provides an easy way to manage Virtual Hosting. Virtual Hosting can be Name Based, IP Based or Port Based. In Name Based Virtual Hosting, multiple domains can be hosted on single Server and single IP address. On the [...]

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    VMware ESXi 6.7 Installation and Basic Configuration |   November 17, 2020

    VMware vSphere is the pioneer in virtualization. No other virtualization software is as feature rich as VMware vSphere. More than 500,000 enterprise data center are now using VMware vSphere. It is expected that most of the data center will be turned into virtualization near future. As VMware vSphere provides more feature than any other virtualization software, it is also expected that demand of VMware vSphere will be increased day by day. VMware ESXi is the foundation of VMware vSphere and [...]

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    MikroTik Hotspot Free Trial Internet Setup |   August 14, 2020

    MikroTik Hotspot is an awesome Hotspot internet solution. It has a lot of features to customize any Hotspot service. Sometimes we may require providing free trial internet in a Hotspot service. MikroTik Hotspot provides easy solution to provide free trial internet to the new user before going to paid version. In my previous article I discussed how to configure MikroTik Hotspot using Winbox. In this article I will discuss how to configure free trial internet in MikroTik Hotspot Server. Free [...]

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    MikroTik Hotspot Server Configuration in RouterOS 7 |   April 25, 2023

    MikroTik Hotspot is an awesome service to run a captive portal network. You can run a public Wi-Fi network, Hotel Network, Airport network, CAMP Wi-Fi network, Shopping Mall Network and so on using MikroTik Hotspot and even can monetize your network for earning if you use Hotspot Billing Software like GalaxyRAD which is specially designed for MikroTik Hotspot network. GalaxyRAD helps to monetize your any network providing online payment gateway as well as integrating voucher-based system. It also helps to [...]

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    CentOS 8 Installation with Screenshots (Server with GUI) |   November 21, 2020

    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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    VLAN Routing Configuration between MikroTik RouterOS |   September 27, 2018

    VLAN (Virtual Local Area Network) is a logical topology that divides a single broadcast domain into multiple broadcast domains. It increases network security and performance as well as improves network efficiency. MikroTik VLAN routing configuration with manageable switch was discussed in previous article. Today we will learn how to configure VLAN between MikroTik RouterOS. This Router to router VLAN (layer3 VLAN) is useful when any ISP provide connection to one or more local ISPs who use MikroTik Router to maintain [...]

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    The Importance of Digital Literacy Training in Today’s Tech-Driven World |   May 19, 2025

    Summary Digital literacy is an essential skill that enables people to participate in contemporary life and work because it influences educational and employment opportunities, communication methods, and civic participation. Basic computer skills and responsibility are joined by critical thinking capabilities, which lead to proper media evaluation techniques as components of digital literacy. Internet access alone does not effectively utilize digital tools since individuals need proper training to harness digital tools effectively. Organizations, including governments, educational institutions, and companies, dedicate funds [...]

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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 Recover MikroTik User Password |   August 9, 2018

    MikroTik Wiki and Forum say that there is no way to recover MikroTik user password without losing MikroTik configuration. But if you have an unencrypted configuration file backup taken before, you will be able to recover your user password using MikroTik password recovery tools. How to Backup and Restore MikroTik configuration file manually was discussed in my previous article. I also discussed how to backup MikroTik configuration file automatically via Mail in another article and in this article I will [...]

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