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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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IP Based Virtual Hosting on CentOS 7 with Apache Server | July 18, 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 Web Hosting is your right choice. Apache web server provides an easy way to manage Virtual Hosting. Virtual Hosting can be either Name Based or IP Based. In Name Based Virtual Hosting, multiple domains can be hosted on single IP address. On the other hand, in [...]
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Virtual Web Hosting with Apache on CentOS 7 (Name Based) | July 15, 2019
Virtual Hosting is a method of hosting multiple domains on single server. If you have multiple domains (such as domain1.com, domain2.com and so on) and want to host on a webserver, Virtual Web Hosting is your right choice. Apache web server provides an easy way to manage Virtual Hosting. Virtual Hosting can be either Name Based or IP Based. In Name Based Virtual Hosting, multiple domains can be hosted on single IP address. On the other hand, in IP Based [...]
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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 Get Free SSL Certificate from ZeroSSL | June 13, 2020
SSL/TLS certificate is an essential part in today internet communication. Online communication cannot imagine without SSL/TLS certificate. SSL/TLS certificate makes online communication secure by encrypting data transmitted over public internet. So, most of the applications (Web, Email and VPN services) those transmit data over public internet use SSL/TLS certificate to secure communication. SSL/TLS certificate requires to be signed by Certificate Authority (CA). It is possible to create self-signed certificate with SSL certificate creation tools such as OpenSSL. Some router venders [...]
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PPPoE Server Configuration in MikroTik RouterOS 7 | December 2, 2023
MikroTik PPPoE is a client-server protocol and mostly used at the end ISP configuration where MikroTik RouterOS acts as a PPPoE Server and user’s WiFi Router acts as PPPoE client. MikroTik PPPoE Server can be used with MikroTik simple queue management. So, it helps to manage user’s bandwidth easily. People who are trying to do internet business should learn MikroTik PPPoE Server. Configuring PPPoE Server in MikroTik RouterOS 7 is so easy. If you have knowledge on basic RouterOS 7 [...]
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Securing MikroTik Router with Port Knocking | March 21, 2021
MikroTik Port Knocking strategy helps to protect MikroTik Router from hackers and unauthorized access as well as enhances MikroTik RouterOS security.
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ISP Bandwidth Management with MikroTik PCQ | June 25, 2016
MikroTik is an excellent router for managing ISP Bandwidth. For this, most of the ISPs are now using MikroTik Router for managing client bandwidth. The service used to manage bandwidth in MikroTik RouterOS is QUEUE. There are various types of queue services in MikroTik Router for managing internet bandwidth. Among these, PCQ can specially be used for maintaining ISP bandwidth. In this article, we will see how to manage ISP Bandwidth with MikroTik PCQ. MikroTik PCQ Service PCQ stands for [...]
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How to Block a Phone from WiFi Router | May 8, 2024
We usually buy a WiFi Router from market and configure SSID and password to access it. We also configure DHCP Server so that whenever a phone or IP device gets connected to this SSID with the password, the device can get an IP address automatically and can get internet access. It is not possible to secure the WiFi Network keeping only the password authentication method. Because the password can be shared by the users or can be hacked easily. So, [...]
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