linux flush dns cache centos 7
Most Relevant Content
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 [...]
- »
Things to Consider When Developing a Mobile App | February 27, 2022
Building a mobile app is one of the best ways to engage your target market and build an audience. If you want to develop a mobile application that will be truly successful, you need to consider every aspect of the development process. At the same time, there are many things to think about when developing a mobile app. Apps are designed to solve problems for people; if you are thinking about creating an app, you need to think about why [...]
- »
Block Internet Access at a Certain Time in MikroTik RouterOS | August 1, 2024
We often find how to block or allow internet access at a certain time in our LAN network specially in WiFi network. Time based internet access is so useful for controlling Kids internet in any family or managing stuff internet accessibility in any office or other network. MikroTik RouterOS offers a feature named Kid Control to block internet access at a certain time. This feature is so useful for the parents or network engineers who want to block internet access [...]
- »
Setting Google as Default Search Engine | September 30, 2015
Google is one of the most popular search engines to any online user. It is said that no online user cannot go a single day without Google search engine. Google search statistics shows that over 40,000 search queries are processed every second by Google. If you have any query about any subject, just type in Google search box and Google will show you billion of results related to your search query within less than a second. So, usually you will want [...]
- »
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 [...]
- »
MikroTik Site to Site SSTP VPN Setup with RouterOS Client | May 14, 2020
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. Secure Socket Tunneling Protocol (SSTP) transports PPP tunnel over TLS channel. SSTP uses TLS channel over TCP port 443. So, SSTP VPN can virtually pass through all firewalls and proxy servers. Because of using TLS [...]
- »
Latest Google Chrome Free Download and Install | August 23, 2015
Google Chrome is one of the most popular web browsers to any online user. Google Chrome is a free application by Google. So, you can download and install Google Chrome in your operating system at any time. Google Chrome is too easy to use and bug is so less. Google Chrome has an awesome look and a lot of functionalities which help to use Google Chrome so easily. It is said that any online user cannot go a single day without Google [...]
- »
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 [...]
- »
Free Web Content Filtering Software for Home Internet | August 10, 2024
We always want to keep safe our home or business internet from unwanted content. There are many internet content filtering softwares those can be used to filter internet content. Among these, OpenDNS is a Free Web Filtering Software used to keep safe home or business internet content. OpenDNS is a DNS based internet content filtering solution. If we use OpenDNS nameservers as DNS, it handles DNS request and filter Malware, Phishing and adult content related websites and denies access. Besides [...]
- »
Hardening MikroTik RouterOS by Limiting Login Services | February 6, 2021
MikroTik RouterOS is usually used as a bridge between WAN and LAN network. WAN network is always an insecure network because attackers always try to hack your RouterOS so that they can compromise it for their own benefit. As a network administrator of MikroTik RouterOS, we should always take anti hacking steps to secure our MikroTik RouterOS. There are a lot of security tasks those we should take care to secure our MikroTik RouterOS. Among these security tasks, we will [...]
You May Also Like
