A DNS server connects domain names to IP addresses. When you type a web address like example.com, the DNS translates it into numbers that computers understand. Without it, your browser would not know where to go. When that translation fails, you see the dreaded DNS server not responding error, and this guide walks through fixes from the simplest to the most advanced.
Understanding the Basics of DNS
DNS errors occur when the translation from domain name to IP address fails. Common reasons include server outages, poor network settings or a DNS server being down. Sometimes an outdated DNS cache or hardware issues cause trouble. You might see messages like This Site Can’t Be Reached or DNS_PROBE_FINISHED_NXDOMAIN, which mean your system cannot resolve DNS for websites.
Common Causes of DNS Server Not Responding Error
Server-Side Issues
Sometimes the DNS server fails to respond due to high traffic or downtime. A DNS server might be unavailable if your provider faces technical problems.
User-Side Issues
Your router or modem might malfunction, causing DNS errors. Incorrect settings or a missing DNS server can also disrupt connectivity.
Software and Hardware Conflicts
Firewalls or antivirus programs can block DNS processes. Misconfigured network adapters and IPv6 settings might create conflicts, making websites inaccessible.
Quick Fixes for Beginners
Switch Your Browser
Your browser might be causing the issue. Try opening the same website in another browser. For example, switch to Edge or Firefox if you are using Chrome. Different browsers use separate caches and settings, which might bypass the error. Clear your browser’s cache and cookies if the site loads, to prevent future problems.
Restart Devices
Restart your router, modem or computer. Unplug the router or modem, wait 30 seconds, then plug it back in. This process, called power cycling, clears temporary glitches in your network. Also reboot your device to refresh its DNS settings and resolve basic DNS errors.
Test on Another Device or Network
Try accessing the website from another device, like your phone or tablet. If it works, the problem might be with your computer. Use mobile data instead of Wi-Fi to check if your home network is the cause. A DNS server might be unavailable for your primary connection but accessible elsewhere.
Check the Website Itself
The website may be down. Use tools like DownDetector or IsItDownRightNow to verify. If the site has issues, it is not your DNS causing the problem. Wait until the site is back online or contact its administrator.
Intermediate Troubleshooting Steps
Flush the DNS Cache
Your computer stores temporary DNS data to speed up website loading. However, outdated or corrupted entries can cause DNS errors. Clearing the cache forces your device to fetch fresh records.
Windows: press Windows + R, type cmd and hit Enter. In the Command Prompt, type ipconfig /flushdns and press Enter. Restart your browser to test the connection.
macOS: open Terminal (use Spotlight with Command + Space). Type sudo killall -HUP mDNSResponder and press Enter. Enter your admin password when prompted.
Linux: open your terminal and use sudo systemd-resolve --flush-caches (this varies by distribution).
Change DNS Server Settings
Your default DNS server may be slow or unreliable. Switching to a public DNS like Google or Cloudflare often resolves issues.
Windows: open Control Panel > Network and Sharing Center. Select your active connection, then click Properties. Highlight Internet Protocol Version 4 (TCP/IPv4) and click Properties. Select Use the following DNS server addresses. Enter Google DNS: 8.8.8.8 (preferred) and 8.8.4.4 (alternate). Click OK.
macOS: go to System Preferences > Network. Select your connection and click Advanced. Open the DNS tab, click the plus button and add 1.1.1.1 and 1.0.0.1 for Cloudflare DNS.
Android: go to Settings > Network & internet > Private DNS. Select Private DNS provider hostname and type dns.google.
iOS: go to Settings > Wi-Fi. Tap the i next to your network and configure DNS manually by adding 8.8.8.8.
Update Network Adapter Drivers
Outdated or corrupted drivers can cause the DNS server not responding error. Keep them updated to ensure smooth connectivity.
Windows: right-click the Start menu and choose Device Manager. Expand Network Adapters, right-click your adapter and select Update driver. Choose Search automatically for updated driver software.
macOS: drivers update automatically with system updates. Go to System Preferences > Software Update to ensure your OS is up to date.
Run Network Diagnostics
Built-in tools can help detect and fix internet DNS issues.
Windows: right-click your network icon and select Troubleshoot problems. Follow the prompts to identify and resolve issues.
macOS: hold Option and click the Wi-Fi icon. Select Open Wireless Diagnostics and follow the wizard to diagnose connectivity problems.
Intermediate Troubleshooting Summary
| Step | Description | Platform | Instructions |
|---|---|---|---|
| Flush DNS Cache | Clears temporary DNS data to resolve corrupted or outdated entries. | Windows | Open Command Prompt, type ipconfig /flushdns and press Enter. Restart browser. |
| Flush DNS Cache | Clears temporary DNS data to resolve corrupted or outdated entries. | macOS | Open Terminal, type sudo killall -HUP mDNSResponder and press Enter. |
| Flush DNS Cache | Clears temporary DNS data to resolve corrupted or outdated entries. | Linux | Open Terminal, type sudo systemd-resolve --flush-caches and press Enter. |
| Change DNS Server | Switches to reliable public DNS like Google or Cloudflare. | Windows | Network and Sharing Center > Properties > TCP/IPv4. Enter 8.8.8.8 and 8.8.4.4. |
| Change DNS Server | Switches to reliable public DNS like Google or Cloudflare. | macOS | Network > Advanced > DNS tab. Add 1.1.1.1 and 1.0.0.1. |
| Change DNS Server | Switches to reliable public DNS like Google or Cloudflare. | Android | Network & internet > Private DNS. Set hostname to dns.google. |
| Change DNS Server | Switches to reliable public DNS like Google or Cloudflare. | iOS | Configure DNS manually in Wi-Fi settings. Add 8.8.8.8. |
| Update Network Drivers | Ensures network adapters are up to date to prevent DNS errors. | Windows | Device Manager, right-click the adapter and select Update driver. |
| Update Network Drivers | Ensures network adapters are up to date to prevent DNS errors. | macOS | Check for updates in System Preferences > Software Update. |
| Run Network Diagnostics | Uses built-in tools to identify and fix connectivity problems. | Windows | Right-click the network icon > Troubleshoot problems. Follow on-screen prompts. |
| Run Network Diagnostics | Uses built-in tools to identify and fix connectivity problems. | macOS | Hold Option, click Wi-Fi icon > Open Wireless Diagnostics. Follow the wizard. |
Advanced Solutions for Experts
Disable IPv6
IPv6 is the latest internet protocol but can sometimes cause DNS errors due to compatibility issues with older systems or networks. Disabling it may resolve persistent DNS server not responding problems.
Windows: open Control Panel > Network and Internet > Network and Sharing Center. Select your active network and click Properties. Uncheck Internet Protocol Version 6 (TCP/IPv6) and click OK.
macOS: go to System Preferences > Network. Select your active connection, click Advanced and open the TCP/IP tab. Change Configure IPv6 to Off and save changes.
Modify the Hosts File
The hosts file maps domain names to IP addresses. Incorrect entries here can block access to websites.
Windows: open Notepad as an administrator. Navigate to C:\Windows\System32\drivers\etc\hosts. Add or remove entries carefully, then save the file.
macOS: open Terminal and type sudo nano /etc/hosts. Edit the file carefully, ensuring correct formatting.
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Resetting network settings can fix misconfigured adapters or TCP/IP settings that lead to internet DNS issues.
Windows: open Command Prompt as Administrator. Run netsh int ip reset and netsh winsock reset, then restart your system to apply changes.
macOS: open Terminal and type sudo ifconfig en0 down, followed by sudo ifconfig en0 up. Restart your system.
Reconfigure Router Settings
Routers often cache DNS settings. Resetting them can resolve the DNS server not responding error across all devices.
- Log in to your router using its IP address (for example, 192.168.1.1) in your browser.
- Navigate to DNS Settings or Advanced Network Settings.
- Set DNS to Manual and enter a reliable DNS like Google (8.8.8.8, 8.8.4.4) or Cloudflare (1.1.1.1, 1.0.0.1).
- Save and restart your router.
Disable Secondary Connections
Conflicting network connections can block DNS requests, causing no DNS server issues.
Windows: open Control Panel > Network and Internet > Network Connections. Turn off all connections except the active one by right-clicking and selecting Disable.
macOS: go to System Preferences > Network. Control-click unused networks and select Make Service Inactive.
Advanced Solutions Summary
| Step | Description | Platform | Instructions |
|---|---|---|---|
| Disable IPv6 | Resolves DNS errors caused by compatibility issues with IPv6. | Windows | Control Panel > Network and Sharing Center > Properties. Uncheck IPv6. |
| Disable IPv6 | Resolves DNS errors caused by compatibility issues with IPv6. | macOS | System Preferences > Network > Advanced > TCP/IP. Set Configure IPv6 to Off. |
| Modify Hosts File | Fixes incorrect domain-to-IP mappings in the hosts file. | Windows | Notepad as admin, edit C:\Windows\System32\drivers\etc\hosts and save changes. |
| Modify Hosts File | Fixes incorrect domain-to-IP mappings in the hosts file. | macOS | Terminal, sudo nano /etc/hosts, make changes and save carefully. |
| Reset Network Settings | Resets misconfigured network adapters and TCP/IP settings. | Windows | netsh int ip reset and netsh winsock reset in Command Prompt as admin. Restart. |
| Reset Network Settings | Resets misconfigured network adapters and TCP/IP settings. | macOS | sudo ifconfig en0 down and sudo ifconfig en0 up in Terminal. Restart. |
| Reconfigure Router | Clears cached DNS settings in the router. | All | Log in to the router via browser. Go to DNS Settings. Set to manual (Google 8.8.8.8, Cloudflare 1.1.1.1). |
| Disable Secondary Connections | Prevents conflicting network connections from causing DNS issues. | Windows | Control Panel > Network Connections. Disable unused connections. |
| Disable Secondary Connections | Prevents conflicting network connections from causing DNS issues. | macOS | System Preferences > Network. Control-click unused networks and make them inactive. |
Specialised Troubleshooting Scenarios
For Home Networks
Home network setups can cause DNS server not responding errors due to outdated firmware or misconfigured settings.
Update your router firmware: find your router’s IP address (for example, 192.168.1.1) and log in through your browser. Look for the Firmware Update or Maintenance section, download the latest firmware from the manufacturer’s website, upload it in the router settings and follow the on-screen instructions.
Optimise home DNS settings: access your router’s DNS settings in the Network or Advanced Settings tab, switch to public DNS servers like Google (8.8.8.8) or Cloudflare (1.1.1.1), save changes and reboot the router.
Check device connectivity: disconnect unused devices to reduce network strain and test connectivity on a single device to identify potential DNS problems.
For Business and Enterprise Networks
Corporate networks face DNS error challenges due to complex firewalls, multiple users and VPN dependencies.
Firewall configuration: access the firewall settings from the admin dashboard, allow traffic on ports 53 (DNS) and 443 (HTTPS) to avoid blocking DNS lookups, and test the connection after adjusting the rules.
Centralise DNS settings: use an enterprise DNS service like OpenDNS or Cloudflare for Business, ensure all devices point to the same DNS servers for consistency, and monitor DNS performance with tools like SolarWinds or Zabbix.
Audit network load: use network monitoring tools to check for overloading and scale DNS resources during peak hours to prevent DNS server down issues.
Using VPNs and Proxy Servers
VPNs and proxies reroute traffic, often causing resolution errors if settings conflict.
Adjust VPN DNS settings: open your VPN client’s settings menu, enable the Use custom DNS option, then enter DNS addresses (for example, 1.1.1.1, 8.8.8.8). Save changes and reconnect to the VPN.
Disable proxy conflicts: on Windows, go to Settings > Network & Internet > Proxy and turn off Use a proxy server. On macOS, navigate to System Preferences > Network > Advanced > Proxies and uncheck all boxes.
Test without VPN or proxy: disconnect the VPN or proxy temporarily and check if the error persists. If resolved, reconfigure the VPN or proxy for compatibility.
DNS Security and Optimisation
Enhancing Security with Custom DNS
Custom DNS providers like Quad9 and OpenDNS can protect against malware and phishing attacks. They also enhance privacy by not storing browsing data. Use Quad9 (9.9.9.9) for security filtering or OpenDNS (208.67.222.222) for customisable content controls. Update the DNS on your router’s admin panel and configure devices directly for consistent protection.
Preventing Future Errors
Flush the DNS cache regularly (ipconfig /flushdns on Windows, or sudo killall -HUP mDNSResponder on macOS) to clear stale entries. Check DNS configurations monthly to ensure no unauthorised changes, enable auto-updates for router firmware, and keep antivirus and firewalls updated to guard against DNS hijacking.
Improving Browsing Speed
An optimised DNS server minimises latency, reducing page load times. Use Google DNS (8.8.8.8) or Cloudflare DNS (1.1.1.1) for speed and reliability, measure performance with tools like DNS Benchmark or Namebench, and update the DNS settings on your router or devices. You can also enable DNS pre-fetching in your browser, for example by turning on Preload pages for faster browsing in Chrome.
When All Else Fails
Contacting Your Internet Service Provider (ISP)
Sometimes the issue lies beyond your control, and a DNS server not responding error could stem from your ISP’s infrastructure. Contact your ISP if you have tried all troubleshooting steps without success, notice widespread outages in your area, or your router diagnostics indicate no DNS connection. Ask whether there are ongoing DNS server issues on their end, whether they can guide you in resetting your connection, and whether they can provide a backup DNS address for temporary use.
Switching DNS Providers
Switching DNS servers can resolve persistent DNS errors and improve browsing. Public options like Google DNS (8.8.8.8) or Cloudflare DNS (1.1.1.1) offer speed and reliability and are less likely to experience downtime than ISP-provided DNS. They may lack the advanced security filters offered by private options like Quad9, and there can be privacy concerns if the provider logs your activity. To switch, access your router or device settings, enter the DNS IP addresses of your chosen provider, then save and restart your connection.
Hardware Replacement or Professional Support
If DNS problems persist, faulty hardware may be the culprit. Signs include frequent connection drops despite software fixes, inconsistent network performance across devices, and error messages like no DNS server detected. Test with another router or network card if available, replace old equipment if troubleshooting does not work, and seek professional IT support for in-depth diagnosis and repairs.
Conclusion
Most DNS server not responding issues have practical fixes. Restart your devices, flush the DNS cache, or switch to a reliable DNS provider like Google DNS or Cloudflare. Advanced steps, such as updating network drivers or disabling IPv6, help tackle tougher problems. Even persistent errors often point to ISP or hardware issues that are manageable with the right action.