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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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MikroTik VPN Configuration with PPTP (Connecting Remote Client) | August 17, 2016
VPN (Virtual Private Network) is a technology that extends private network across a public network. It enables private network users to send and receive data across public network as if their network devices were directly connected to the private network. There are many VPN services in MikroTik RouterOS 7. Among them, MikroTik PPTP is a mostly used VPN service. It is a client-server VPN technology. So, a user can access server, printer, IP phone and any other network devices of [...]
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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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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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MikroTik EoIP Tunnel for Bridging LANs over the Internet | April 22, 2018
VPN (Virtual Private Network) is a technology that provides a secure tunnel across a public network. A private network user can send and receive data to any remote private network using VPN Tunnel as if his/her network device was directly connected to that private network. MikroTik provides EoIP (Ethernet over IP) that is used to create a site to site VPN tunnel. EoIP tunneling is a MikroTik RouterOS protocol that creates an Ethernet tunnel between two MikroTik Routers on top [...]
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Mikrotik Router Basic Configuration Using Winbox | August 24, 2015
MikroTik is one of the most popular routers. MikroTik Router has a lot of networking services that help to build a stable and smooth network so easily. It is said that any ISP Company or any Enterprise Office cannot go a single day without MikroTik Router. So, system administrators who are not using MikroTik Router yet, they will soon start using MikroTik Router, I think. As a system administrator, I am also using MikroTik Router about 5 years in my network [...]
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FreeRADIUS User Group Management with MySQL | January 3, 2019
FreeRADIUS is a high performance RADIUS Server. A number of network devices can be used with freeRADIUS Server as a RADIUS Client including MikroTik Router. As a modular RADIUS suite, freeRADIUS accepts MySQL module to query user authentication and authorization and to store accounting data. In my previous article, I discussed how to install and configure FreeRADIUS MySQL module. I also discussed how to authenticate MikroTik Login with freeRADIUS MySQL user. In this article, we will talk about how to [...]
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MikroTik Hotspot Login by MAC Cookie Configuration | July 10, 2020
MAC Cookie is a newly introduced Hotspot feature in MikroTik Router. MAC Cookie is specially designed to improve accessibility for smartphones, laptop and other mobile devices. MAC Cookie is not a basic login method rather it is an extension of basic Hotspot login method such as HTTP CHAP, HTTP PAP and HTTPS. So, when MAC Cookie is used with these basic Hotspot login methods, it improves the Hotspot user accessibility. In my previous article, I discussed MikroTik Hotspot basic configuration [...]
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Ubuntu Server 20.04 Installation with LVM | May 28, 2021
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, Ubuntu is one of the best stable Linux distributions. Ubuntu has both Desktop and Server distribution. Ubuntu Server is a high performance and stable enterprise Linux distribution and it can be easily used in production. Ubuntu Server has both community-support and well documentation. So, IT guys can use Ubuntu [...]
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Internet Content Filtering in MikroTik Router using OpenDNS | August 22, 2024
Internet content is always not safe for our work or home network. We always face malware, phishing and adult content which are harmful for office or home internet. Using web content filtering software, we can easily get rid of this harmful content. OpenDNS is a cloud-based internet content filtering solution that helps to keep our office or home internet free from malware, virus and adult content. Configuring Free OpenDNS Home Internet feature with our Home WiFi Router, we can easily [...]
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