centos dns settings

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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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    CentOS 8 Networking Configuration Using Cockpit Web Console |   January 11, 2021

    The first task after completing CentOS 8 fresh installation is to configure its networking so that it can be accessed from other network devices. In my previous article, I discussed how to install CentOS 8 Graphical User Interface (GNOME Desktop) with step by step screenshots. If you are a new CentOS 8 user and have not yet installed CentOS 8 on your server machine, feel free to follow that article and install CentOS 8 GNOME Desktop according to the article. [...]

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    MikroTik PPPoE Server Configuration with freeRADIUS Server |   January 20, 2019

    PPPoE Service is one of the most popular services in MikroTik Router. It is specially used by the local ISP provider for the simplicity of client connection. MikroTik PPPoE Service accepts user or client authentication and authorization both MikroTik local user database and RADIUS user database. RADIUS Server provides an efficient way to manage user authentication, authorization and accounting.  FreeRADIUS is a high performance RADIUS suite that provides user authentication, authorization and accounting facility for a number of network devices [...]

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    MikroTik Router Web Proxy Configuration |   August 28, 2016

    A Proxy Server is usually placed between users and the internet so that the proxy server can track the activities of any user. Formerly, a proxy server was mainly used for caching the static content of any web server because the internet speed was too slow. So, users would get high speed for browsing as if they were browsing a local server. But nowadays the internet bandwidth has increased. So, the proxy server is usually not used for web caching [...]

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    WireGuard Site to Site VPN Between MikroTik RouterOS 7 |   September 29, 2022

    WireGuard is a free, open source, secure and high-speed modern VPN solution. WireGuard is extremely easy to implement but utilizes state-of-the-art cryptography. WireGuard can be used as either Client-Server VPN technology or Site to Site VPN technology. From the RouterOS 7, MikroTik introduces WireGuard VPN as their native package. So, who are using RouterOS 7 can use WireGuard VPN and can implement both client-server and site to site VPN with WireGuard free VPN server. In my previous article, I discussed [...]

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    MikroTik Backup and Restore Configuration using Winbox |   July 31, 2018

    Backup and Restore feature in MikroTik Router helps to recover router configuration when running router fails to operation due to hardware failure. If you have a backup copy of your failed router and purchase a new MikroTik Router and then upload and restore that backup file, you will get your running network without any hassle. MikroTik Backup file is also useful when you unfortunately forget your admin privilege user password. You can easily recover your forgotten password with backup file [...]

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    MikroTik DNS Client and Caching DNS Server Configuration |   April 7, 2019

    Domain Name Server (DNS) is an essential part in a computer network. Today web communication cannot imagine without DNS. DNS is a client server protocol where DNS Client requests for the domain name resolution and DNS Server response on it. MikroTik Router has both DNS Client and DNS Server features. The DNS Client is used to resolve domain name to IP address from a DNS Server. On the other hand, the DNS Server feature provides domain name resolution for the [...]

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    Managing Disk Partition with the parted Tool in CentOS 7 |   March 2, 2019

    As a system administrator, sometimes you may require to manage partitions of your CentOS/Red Hat Linux Operating System. Partition management is always a risky task. But there are some useful tools those are so helpful to manage CentOS/Red Hat Linux disk partition easily. In my previous article, I discussed how to manage CentOS/Red Hat 7 HDD partitions with the fdisk utility. The fdisk tool is only eligible to manage MBR partition table. But GPT partition table is now becoming more [...]

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    MikroTik Configuration with DHCP WAN Connection |   March 24, 2019

    MikroTik Router is one of the most popular routers because of having a lot of networking features. MikroTik DHCP Client is a special feature that is used to connect to any DHCP Server. So, if any uplink ISP provides DHCP connection, MikroTik Router is able to connect that DHCP Server using this DHCP Client. In my previous article, I discussed how to configure MikroTik Router with PPPoE WAN Connection. In this article, I will discuss how to configure MikroTik Router [...]

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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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