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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How to Assign VMware ESXi License Key | December 4, 2021
No doubt VMware is the pioneer in virtualization world. VMware can be used either premium or free based on licensing. In the previous article, I discussed how to install VMware ESXi on a physical server or machine and then I also discussed how to get VMware ESXi free license from VMware website. Getting VMware ESXi license key either premium or free, we may sometimes get confused how to assign the license key in VMware ESXi host. So, in this article [...]
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MikroTik Hotspot Customized Login Template | April 14, 2022
MikroTik Hotspot is a popular service which is used to manage ISP, Hotel, Restaurant, Airport, and Public WiFi. Using billing application like GalaxyRAD with MikroTik Hotspot, a WiFi network can manage professionally. MikroTik Hotspot loads a login page for new user authentication. So, this login page is a vital source for promoting your brands. The default login template provided by MikroTik Hotspot is a simple template which cannot fulfill branding requirements. But it is possible to customize the login template [...]
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MikroTik Site to Site OpenVPN Server Setup (RouterOS Client) | April 9, 2018
VPN (Virtual Private Network) technology provides a secure and encrypted tunnel across a public network. So, a private network user can send and receive data to any remote private network through VPN tunnel as if his/her network device was directly connected to that private network. MikroTik OpenVPN Server provides a secure and encrypted tunnel across public network for transporting IP traffic using PPP. OpenVPN Server uses SSL Certificates. So, OpenVPN Tunnel is a trusted tunnel to send and receive data [...]
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How to Buy a Good WiFi Router for Home or Office | October 12, 2021
You are here because you want to buy a WiFi Router and want to know how to buy a good WiFi Router for your home or office or business. A lot of wireless routers are nowadays available in the market. But before buying a WiFi Router, you should know which one is a good WiFi Router for your need based on some features and specifications of the router. We will now see some key points those should have well understand [...]
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MikroTik CAPsMAN and CAP Basic Configuration using Winbox | February 20, 2020
MikroTik CAPsMAN (Controlled Access Point system Manager) is a centralized Access Point management application provided by MikroTik. MikroTik introduces CAPsMAN from RouterOS v6.11 with CAPsMAN v1 and from RouterOS v6.22rc7 CAPsMAN v2 is running. If you have multiple MikroTik CAPs (Controlled Access Point) in your organization, CAPsMAN provides an easy way to maintain client data as well as CAPs configuration centrally. In my previous article, I discussed how to configure MikroTik Wireless Router as an Access Point. In this article, [...]
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Create System Restore Point in Windows OS | August 27, 2015
System Restore utility in windows operating system helps a windows user to take one or more snapshots of his/her windows system when windows operating system is working well. If any system crash occurs in future due to virus attack or critical system update or any unwanted program, the system can be reverted to its previous snapshot when windows OS was working well. So, System Restore utility in windows operating system is a very helpful service for windows users to protect [...]
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FreeRADIUS Installation and Basic Configuration on CentOS 7 | November 28, 2018
FreeRADIUS is a modular, high performance and highly customizable open source RADIUS server. Anyone can use FreeRADIUS without any charge and can customize his RADIUS server according to his organizational requirements. In my previous article, I discussed how to install and configure user manager RADIUS server developed by MikroTik. The main disadvantage of user manager RADIUS server is ‘it is not customizable and not suitable for medium or large organization’. On the other hand, FreeRADIUS is giving facility to customize [...]
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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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