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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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Why ISPs Should Embrace TR-069 ACS to Stay Ahead of Competitors | May 22, 2023
As the telecommunications industry becomes more competitive, local ISPs need to find ways to stay ahead of larger telcos and offer services that meet the changing demands of their customers. One of the solutions to this challenge is to implement TR-069 ACS server to help streamline network management, reduce costs, and increase efficiency. In this article, we’ll explore why the TR-069 ACS server is essential for medium-sized ISPs to stay competitive in today’s market. We’ll examine the challenges these ISPs [...]
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MikroTik Port Forwarding using Winbox | July 23, 2018
MikroTik Port Forwarding or Port Mapping is a NAT application that is used to redirect a request from MikroTik IP address and port number combination to a local IP address and port number. For example, if you have a Web Server or FTP Server in your private/local area and want to access this local server from outside of your local area (from internet/public), you can apply MikroTik port forwarding or port mapping and can easily access your Web Server or [...]
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MikroTik Send Browsing Log to Remote Syslog Server | August 18, 2019
MikroTik RouterOS is capable of logging various system events as well as user browsing information. Logs can be saved in router’s memory (RAM), disk, file, sent by email or even sent to remote syslog server. Sometimes it may require saving user browsing log by the law. So, a syslog server is an essential part to any network. In this article, I will discuss how to configure MikroTik Router to keep user browsing log and send that log to remote syslog [...]
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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 [...]
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Guest WiFi – How to Setup on MikroTik AP | April 30, 2024
Guest WiFi helps to keep your network safe and secure. Any sensitive wireless network should have a guest network. So, Guest WiFi is so essential for an office network. In a corporate office, guests or visitors frequently come and get connected to get internet for a few times. It is so much security issue to keep guest or visitor in the core network because among them someone can damage important network resources. So, to keep them isolated from the core [...]
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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 [...]
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MikroTik VLAN and Bridge Configuration | September 19, 2017
VLAN and Bridge are two useful features in MikroTik Router. These two features are frequently used in any MikroTik network configuration. VLAN divides a physical interface into multiple logical interfaces. So, you can isolate your network into multiple logical networks on a physical interface. On other hand, MikroTik Bridge integrates multiple physical interfaces in a logical interface. So, you can extend your broadcast domain on multiple physical interfaces and can extend your popular services such as PPPoE or DHCP on [...]
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MikroTik WebProxy Log Analyzer Configuration | August 30, 2016
MikroTik RouterOS generally logs various system events and status information. Logs are mainly saved in router’s memory (RAM) or disk. MikroTik logs can also be sent by email or even can be sent to a remote syslog server. All logs those are saved in router’s local memory can be viewed from Log menu. Any log entry that is saved in local memory contains time and date when event occurred, topics that this message belongs to and message itself. But local [...]
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How to Block Tor Browser with MikroTik Router | June 12, 2019
Tor Browser is an alternative to VPN and Web Proxy that breaks blocking firewall rule. If any user installs and uses Tor Browser, he/she can hide the public IP address of router and can unblock blocked websites applied on a network. So, administrators should block Tor Nodes along with other blocking firewall rule. In my previous article, I discussed how to block VPN and Proxy access with MikroTik Router and in this article I will discuss how to block Tor [...]
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