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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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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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System Restore in Windows 10 | August 30, 2015
Windows is the most popular operating system in the world. No computer user can go a single day without windows operating system. As windows is a popular and mostly used operating system, a lot of viruses or unwanted programs are creating everyday. So, you may face various unusual behavior in your windows operating system due to various virus attack or unwanted programs installation. But windows has integrated a lot features which help to prevent these unwanted programs and keep your [...]
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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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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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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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MikroTik Hotspot Login by HTTP CHAP, HTTP PAP and HTTPS | July 25, 2020
MikroTik Hotspot uses various types of login methods. Among these login methods HTTP CHAP, HTTP PAP and HTTPS are basic and important login methods. So, a MikroTik system administrator should have proper understanding on Hotspot HTTP CHAP, HTTP PAP and HTTPS login methods. In my previous article I discussed how to configure MikroTik Hotspot using Winbox. In this article I will discuss how to use HTTP CHAP, HTTP PAP and HTTPS login methods properly in MikroTik Hotspot Server. MikroTik Hotspot [...]
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How to Separate MikroTik Hotspot and DHCP IP Pool | October 9, 2020
MikroTik default Hotspot Setup comes with a DHCP Server (which uses same IP Pool of Hotspot Server) to provide IP address and other network information to a connected device. Using this automatic IP address connected device can access Hotspot login page. After successfully login, a one to one NAT IP address is also assigned for the device and this process happens internally in Hotspot Server. User device cannot know this one to one NAT IP assigning. However, Hotspot Server actually [...]
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MikroTik Unequal Dual WAN Load Balancing with Failover using ECMP | September 15, 2019
MikroTik Router is capable of doing Load Balancing with Failover over multiple gateways. Policy Based Routing, ECMP, PCC and NTH Load Balancing are the popular load balancing methods in MikroTik Router. Among these methods, ECMP is so easy to configure and provides almost 100% load balancing and link redundancy solution. In my previous article, I discussed how to configure Load Balancing and Link Redundancy using ECMP over two equal bandwidth gateways. ECMP method is also capable of doing load balancing [...]
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MikroTik Bandwidth Management using Simple Queue | September 3, 2015
MikroTik is one of the most popular routers in computer networking. It is said that no office or ISP company cannot go a single day without MikroTik Router. MikroTik Router is also a popular router to a network administrator because MikroTik Router is easily maintainable with graphical user interface software named winbox than other routers. A lot of services are available in MikroTik router to run a network smoothly. Among these services, Bandwidth Management Service is the most popular service in [...]
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