Free vs. Paid DNS Servers

Free DNS servers are typically provided by organizations or individuals as a public service, while paid DNS servers are offered by commercial companies and typically include additional features and support. Some benefits of using a paid DNS service include increased reliability, faster performance, and more advanced features such as DDoS protection and real-time analytics. However, free DNS services can still be a viable option for individuals or small businesses that do not require these additional features. Paid DNS services typically offer a variety of advanced features and services, such as:

  • Advanced security features, such as DDoS protection and DNSSEC
  • Increased performance and reliability through Anycast routing and global server networks
  • Increased control over DNS records, including the ability to create custom records and make real-time updates
  • Advanced analytics and reporting, including statistics on DNS queries and the ability to troubleshoot issues
  • Technical support and assistance with configuring and managing DNS settings.

What is DNS Cache Poisoning?

In a cyberattack known as DNS spoofing or DNS cache poisoning, incorrect DNS records are injected to corrupt the DNS resolver’s cache. Due to this, users are redirected to a malicious website when the resolver returns an incorrect IP address for a domain name. DNS cache poisoning has the potential to spread malware, steal login credentials, and perform other harmful actions. Strong security measures must be in place to guard against DNS cache poisoning.

What is flush DNS and how does it operate?

Flushing DNS is a method of clearing the local DNS cache, which is stored on a computer or device. The DNS cache contains a record of all recent DNS lookups so that the device can quickly resolve a domain name to an IP address without having to query the DNS server again. When a user flushes their DNS cache, they are essentially clearing out the stored information and forcing their device to retrieve new information from the DNS server. There are a few different ways to flush the DNS cache, depending on the operating system you are using.

On Windows:

  • Press Windows+ R
  • In the window that appears, type cmd, and then click OK.
  • type “ipconfig /flushdns” to flush the DNS cache.

On macOS:

  • Open the Terminal and type “sudo dscacheutil flushcache” to flush the DNS cache.

On Linux:

  • Open the terminal and type “sudo /etc/init.d/nscd restart” to flush the DNS cache.

It’s important to keep in mind that flushing the DNS cache will clear all stored information, so your device may take longer to resolve domain names until the cache is repopulated.

Access Issues

Although we stated that the DNS system matches the IP address and domain name, IP address changes can occasionally take place. In most cases, when we transfer the domain name to another organization, the name server is changed. This results in access issues because the IP address and the domain name record stored in your DNS cache memory are different. Your access issue will be resolved by your operating system issuing a new DNS query after clearing this record with the Flush DNS operation and receiving the most recent IP address information from the DNS system.


If your privacy is essential to you, clearing the visit history in your browser might not be enough. You can increase privacy by flushing your DNS records using the Flush DNS operation. Flushing DNS records can help protect your privacy by eliminating traceable visits stored in your computer cache.

Cyber security

Cyber attacks can potentially affect DNS records in several ways, including:

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