How to change DNS settings (step by step)

In the modern digital age, the Domain Name System (DNS) plays a critical role in how we access websites and online services. DNS acts like the internet’s address book, converting domain names into IP addresses that computers use to identify each other on the network. Occasionally, you might need to change your DNS settings to improve internet speed, enhance security, or troubleshoot connectivity issues. This article provides a detailed, step-by-step guide on how to change DNS settings across various devices, along with solutions for common DNS-related problems.

Step-by-Step Guide to Changing DNS Settings

1. Changing DNS Settings on Windows

To change the DNS settings on a Windows computer, begin by opening the Control Panel. Navigate to "Network and Internet" > "Network and Sharing Center" > "Change adapter settings." Right-click on the network adapter you want to configure (either Ethernet or Wi-Fi), and select "Properties." Scroll down to "Internet Protocol Version 4 (TCP/IPv4)" or "Internet Protocol Version 6 (TCP/IPv6)" and click "Properties." From there, select "Use the following DNS server addresses," input the preferred and alternate DNS server addresses, and click "OK" to save your changes.

2. Changing DNS Settings on macOS

For macOS users, click on the Apple icon in the top-left corner of the screen and select "System Preferences." Then, choose "Network" and select the network service you use from the list on the left (e.g., Wi-Fi or Ethernet). Click "Advanced" and go to the "DNS" tab. Here, you can click the "+" button to add new DNS servers or "-" to remove them. After adding your preferred DNS servers, click "OK," then "Apply" to save the changes.

3. Changing DNS Settings on Mobile Devices

On Android devices, go to "Settings," then "Network & internet," "Advanced," and "Private DNS." You can choose "Automatic" for default settings, or select "Private DNS provider hostname" to enter a custom DNS. For iOS devices, go into "Settings," tap "Wi-Fi," and click on the information icon next to the network you are connected to. From there, select "Configure DNS," then "Manual," and add your DNS servers by tapping "Add Server."

Troubleshooting Common DNS Issues

1. Slow or Non-Responsive DNS

One of the most frequent DNS issues is slow or non-responsive DNS resolutions. This can often be resolved by simply changing your DNS server to a more reliable one like Google DNS or OpenDNS. Additionally, flushing your DNS cache can help clear any stored DNS responses that might be outdated or incorrect. This can be done by running ipconfig /flushdns in Command Prompt on Windows or by using sudo killall -HUP mDNSResponder in the Terminal on macOS.

2. DNS Server Not Responding

If you encounter a “DNS server not responding” error, first check your internet connection to ensure it’s active. If your connection is fine, the issue might be with the DNS server itself. Try switching to a different DNS server. If problems persist, temporarily disable any firewall or security software, as these can occasionally block DNS traffic.

3. Incorrect DNS Configuration

Mistakes in DNS configuration, such as typing errors in DNS addresses, can lead to connectivity issues. Always double-check the DNS addresses you enter. If you’re not sure what the correct DNS settings should be, consult your ISP or a trusted networking resource. Setting your configuration to automatically obtain DNS settings can also be a foolproof method if persistent errors occur.

Changing your DNS settings can significantly impact your browsing experience and overall internet performance. By following the steps outlined above, you can easily modify your DNS settings across different devices and operating systems. Remember, if you face ongoing issues or errors after changing your DNS, revisiting the troubleshooting steps can help diagnose and solve most common DNS problems. With this knowledge, you can ensure a smoother, more secure online experience.

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