local dns server with centos7 linux

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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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    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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    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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    MikroTik User Manager Installation and Basic Configuration |   December 15, 2019

    MikroTik User Manager is a RADIUS application developed by MikroTik team and can be used without charge. User Manager is used for authentication, authorization and accounting of MikroTik RouterOS, PPPoE, Hotspot, DHCP and Wireless users. Although User Manager Package is developed by MikroTik it will not be found in RouterOS by default. So, we have to install User Manager Package manually if we wish to use this RADIUS application. User Manager can be installed on MikroTik RouterBOARD, MikroTik CHR or [...]

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    VMware ESXi 7.0 Installation and Basic Configuration |   December 1, 2020

    VMware vSphere is the pioneer in virtualization world. 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 in near future. As VMware vSphere provides more feature than any other virtualization software, it is also expected that demand of VMware vSphere will increase day by day. VMware ESXi is the foundation of VMware vSphere [...]

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    MikroTik OpenVPN Setup with Windows Client |   April 2, 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 uses SSL Certificates. So, OpenVPN Tunnel is a trusted tunnel to send and receive data across [...]

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    7 Best WiFi Router Brands For Home Or Apartment |   September 18, 2021

    So, you are deciding to buy a WiFi Router for your home or apartment and finding which brand will be the best WiFi Router for your home. A lot of brands which manufacture WiFi Router for home usage are available nowadays in the market but all brands are not renowned and don’t provide best performance for home usage. So, before going to buy a WiFi Router, you should have better understanding about Best WiFi Router Brand that provides best WiFi [...]

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    MikroTik RouterOS User Authentication via RADIUS Server |   November 19, 2017

    MikroTik RouterOS has a strong local user database that is enough to manage a single MikroTik RouterOS user. But if your network has more than one MikroTik Routers, it is always better to use a RADIUS server to manage RouterOS user centrally. MikroTik User Manager RADIUS Server is a centralized user authentication and accounting application that gives the ISP Company or network administrator ability to manage not only RouterOS users but also PPP, Hotspot, DHCP and Wireless users. How to [...]

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    MikroTik RADIUS Server Setup with User Manager – RouterOS7 |   August 4, 2022

    MikroTik User Manager RADIUS Server is an awesome service for user Authentication, Authorization and Accounting (AAA) for a small or medium business. User Manager RADIUS Server can be used to maintain Hotspot, PPP, DHCP, IPsec, Wireless and System User authentication.  In RouterOS 7, User Manager has come with new features and looking, specially, maintaining from Winbox. As User Mange package does not come with the default system package in RouterOS 7, we have to install User Manger package manually before [...]

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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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