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How to Fix DNS Server?

Published in DNS Troubleshooting 3 mins read

Fixing DNS server issues can often be resolved with a systematic approach. Here’s a breakdown of common troubleshooting steps based on the provided references:


Common DNS Troubleshooting Steps

It's important to note that sometimes the issue isn't necessarily with your DNS settings, but with external factors. Here's how you can approach fixing it:

Initial Checks

  1. Try a Different Browser: While switching browsers won't directly fix DNS problems, it can help determine if the problem is browser-specific.
    • If the website works in another browser, then the problem is likely with the initial browser's settings, not your DNS server.
  2. Test on Another Device: Check if the website loads correctly on a different device connected to the same network.
    • If the website works on the other device, your computer may be the source of the problem.
  3. Restart Your Computer: A simple restart can often resolve temporary network glitches, including DNS issues.
    • This helps to clear any temporary files or configurations that may be interfering.
  4. Safe Mode Restart: Rebooting in safe mode can eliminate the chance of third-party software causing the issues.
    • This helps you determine whether a conflict with some other software is the root cause.


Network & Security Adjustments

  1. Disable Antivirus/Firewall: Antivirus or firewall settings can sometimes interfere with network connections.
    • Temporarily disabling them can help isolate the problem.
    • Be sure to re-enable them afterward.
  2. Turn Off VPN: VPN connections can sometimes disrupt DNS queries.
    • Try disabling your VPN to see if that resolves the issue.


DNS Specific Solutions

  1. Flush DNS Cache: Clearing your computer's DNS cache can remove outdated entries that might be causing issues.
    • For Windows: Open Command Prompt as administrator and type ipconfig /flushdns.
    • For Mac: Open Terminal and type sudo killall -HUP mDNSResponder.
  2. Restart Your Router: The router acts as the intermediary between you and the internet. Rebooting it can often resolve network-related issues, including DNS problems.
    • Unplug your router from the power source, wait for 30 seconds and then plug it back in.


Summary of Solutions

Step Description
1. Different Browser Check if the problem is browser-specific.
2. Different Device See if issue persists on another device connected to the same network.
3. Computer Restart Refresh network configurations and resolve any minor glitches.
4. Safe Mode Restart Determine if third-party software interference is the issue.
5. Disable AV/Firewall Check if these security measures are interfering with your internet connectivity.
6. Turn Off VPN Disconnect your VPN to see if it’s the source of the problem.
7. Flush DNS Cache Remove outdated DNS records that may be causing issues.
8. Router Restart Reset your router to fix any network-related problems.


By methodically going through these steps, you should be able to effectively diagnose and address most DNS server issues.

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