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 Load Balancing and Link Redundancy with PBR | March 31, 2019
In computer networking, the Load Balancing technique is used to send network traffic over multiple gateways. If you have multiple ISP connections available, you can use load balancing technique to establish a stable network. You may now ask, why will I use multiple ISP connections? What are the benefits to use multiple ISP connections in my network? For your satisfaction, the following points are some reasons to use load balancing technique in your network. No ISP can give you 100% [...]
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Restrict Internet Access Based on MAC Address in MikroTik | February 4, 2017
MikroTik router has a lot of features by which a network administrator can design his network as he likes. As a network administrator, sometimes you may need to allow internet access some specific devices. If other devices try to access internet, they will be rejected by your router. For example, say, you have configured a simple network like below diagram. In this network, you have configured WAN, LAN, Gateway, DNS and NAT. Also you have created queue rules for limiting [...]
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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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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 VPN Configuration with Site-to-Site PPTP | February 19, 2018
VPN (Virtual Private Network) is a technology that provides a secure and encrypted tunnel across a public network and using this VPN tunnel a private network user can send and receive data to any remote private network as if his/her network device was directly connected to that private network. MikroTik PPTP is a popular client-server VPN service that provides a secure and encrypted link across public network. MikroTik PPTP can be applied in two methods. Connecting remote workstation/client: In this [...]
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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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MikroTik IPIP Tunnel with IPsec (Site to Site VPN) | March 18, 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 IPIP tunnel that is used to create a site to site VPN. IPIP tunnel is a simple protocol that encapsulates IP packets in IP to make a tunnel between two routers. To encapsulate [...]
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MikroTik Router Integration and Configuration on GNS3 | September 19, 2018
GNS3 is a network simulator software used by hundreds of thousands of network engineers worldwide to emulate, configure, test and troubleshoot virtual and real networks. GNS3 can talk a large number of network vendors including MikroTik. MikroTik introduces Cloud Hosted Router (a RouterOS version) that is used to run as virtual machine and a virtual machine can easily be integrated with GNS3. So, network administrators who are fond of MikroTik Router can now configure, test and troubleshoot their MikroTik network [...]
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