DNS Server Not Responding: How to Fix This Network Error Fast

When you see “DNS server not responding,” your computer can’t reach the system that translates website names into addresses. This breaks your internet connection completely, even when WiFi shows connected.

What DNS Means and Why It Matters

DNS (Domain Name System) works like a phone book for the internet. When you type “google.com,” DNS servers convert that name into an IP address like 172.217.164.46 so your browser knows where to go.

When DNS fails, your device can’t find any websites. You’ll see error messages like:

• “DNS server isn’t responding”
• “Server DNS address could not be found”
• “DNS_PROBE_FINISHED_NO_INTERNET”

The quick answer: Most DNS problems come from temporary server issues, wrong network settings, or router glitches. You can fix 90% of cases by restarting your router, flushing DNS cache, or switching to public DNS servers like Google’s 8.8.8.8.

Why Your DNS Server Stops Responding

Network Hardware Issues

Your router or modem might be overloaded or stuck. These devices run 24/7 and sometimes need a reset to clear memory and refresh connections.

ISP DNS Problems

Your internet provider’s DNS servers occasionally crash or slow down. Peak usage times (evenings and weekends) make this worse.

Firewall or Antivirus Blocking

Security software sometimes blocks DNS requests by mistake. Windows Defender, Norton, and Avast have all caused DNS conflicts.

Corrupted DNS Cache

Your computer stores recent DNS lookups to speed up browsing. This cache gets corrupted from interrupted connections or software conflicts.

Wrong Network Adapter Settings

Outdated drivers or incorrect TCP/IP settings stop your computer from communicating with DNS servers properly.

Fix DNS Server Not Responding on Windows

Step 1: Restart Your Router and Modem

Power cycling fixes most temporary network issues.

1. Unplug your router’s power cable
2. Unplug your modem’s power cable
3. Wait 30 seconds
4. Plug the modem back in first
5. Wait for all lights to stabilize (1-2 minutes)
6. Plug the router back in
7. Wait another minute, then test your connection

This clears temporary glitches and refreshes your connection to your ISP.

Step 2: Flush DNS Cache

Windows stores DNS information that might be outdated or corrupted.

1. Press Windows + R
2. Type cmd and press Ctrl + Shift + Enter (opens as administrator)
3. Type this command: ipconfig /flushdns
4. Press Enter
5. You’ll see “Successfully flushed the DNS Resolver Cache”
6. Close the window and test your internet

Step 3: Change DNS Server to Google or Cloudflare

Your ISP’s DNS servers might be down. Public DNS servers offer reliable alternatives.

Using Google DNS (8.8.8.8):

1. Press Windows + R
2. Type ncpa.cpl and press Enter
3. Right-click your active network connection
4. Click “Properties”
5. Select “Internet Protocol Version 4 (TCP/IPv4)”
6. Click “Properties”
7. Select “Use the following DNS server addresses”
8. Enter Preferred: 8.8.8.8
9. Enter Alternate: 8.8.4.4
10. Click “OK” twice
11. Restart your browser

Alternative DNS Options:

DNS Provider	Primary DNS	Secondary DNS	Speed	Privacy
Google	8.8.8.8	8.8.4.4	Fast	Moderate
Cloudflare	1.1.1.1	1.0.0.1	Very Fast	High
OpenDNS	208.67.222.222	208.67.220.220	Fast	Moderate
Quad9	9.9.9.9	149.112.112.112	Fast	High

Cloudflare focuses on privacy and speed. OpenDNS offers content filtering for families.

Step 4: Update Network Adapter Driver

Outdated drivers cause communication problems with DNS servers.

1. Press Windows + X
2. Click “Device Manager”
3. Expand “Network adapters”
4. Right-click your WiFi or Ethernet adapter
5. Select “Update driver”
6. Choose “Search automatically for drivers”
7. Follow prompts and restart if needed

If Windows finds nothing, visit your computer manufacturer’s website for the latest drivers.

Step 5: Disable IPv6 Temporarily

Some networks have incomplete IPv6 support, causing DNS conflicts.

1. Press Windows + R
2. Type ncpa.cpl and press Enter
3. Right-click your connection
4. Click “Properties”
5. Uncheck “Internet Protocol Version 6 (TCP/IPv6)”
6. Click “OK”
7. Test your connection

Keep IPv6 disabled only if it fixes your issue. The internet is transitioning to IPv6, so you’ll eventually need it enabled.

Step 6: Reset TCP/IP Stack

This returns all network settings to defaults without affecting your files.

1. Open Command Prompt as administrator (Windows + R, type cmd, press Ctrl + Shift + Enter)
2. Type these commands one at a time:
   • netsh winsock reset
   • netsh int ip reset
   • ipconfig /release
   • ipconfig /renew
3. Restart your computer

Fix DNS Server Not Responding on Mac

Flush DNS Cache on macOS

1. Open Terminal (press Cmd + Space, type “Terminal”)
2. Type: sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
3. Press Enter and enter your password
4. No message appears, but cache is cleared

Change DNS Servers on Mac

1. Click Apple menu → System Settings
2. Click “Network”
3. Select your connection (WiFi or Ethernet)
4. Click “Details”
5. Click “DNS” tab
6. Click the “+” button
7. Add 8.8.8.8 and 8.8.4.4
8. Click “OK”

Renew DHCP Lease

1. System Settings → Network
2. Select your connection
3. Click “Details”
4. Click “TCP/IP” tab
5. Click “Renew DHCP Lease”
6. Wait a few seconds

Router-Level DNS Fixes

Sometimes the problem lives in your router, not your computer.

Access Router Settings

1. Open a web browser
2. Type your router’s IP address (usually 192.168.1.1 or 192.168.0.1)
3. Log in (default credentials often printed on router or “admin/admin”)

Change Router DNS Settings

1. Find “Internet” or “WAN” settings
2. Look for DNS Server fields
3. Switch from “Automatic” to “Manual”
4. Enter Google DNS: 8.8.8.8 and 8.8.4.4
5. Save settings
6. Restart router

This fixes DNS issues for every device on your network at once.

Update Router Firmware

Outdated router software causes stability problems.

1. Log into router settings
2. Find “Administration” or “Firmware Update”
3. Check for updates
4. Download and install if available
5. Never interrupt a firmware update

Fix DNS Issues on Android and iPhone

Android DNS Fix

1. Open Settings
2. Tap “Network & Internet”
3. Tap “WiFi”
4. Long-press your network name
5. Tap “Modify network”
6. Tap “Advanced options”
7. Change “IP settings” to “Static”
8. Scroll to DNS fields
9. Enter DNS 1: 8.8.8.8
10. Enter DNS 2: 8.8.4.4
11. Tap “Save”

iPhone DNS Fix

1. Open Settings
2. Tap “WiFi”
3. Tap the “i” icon next to your network
4. Tap “Configure DNS”
5. Tap “Manual”
6. Remove existing DNS servers (tap the minus icon)
7. Tap “Add Server”
8. Enter 8.8.8.8
9. Tap “Add Server” again
10. Enter 8.8.4.4
11. Tap “Save”

Reset Network Settings (Last Resort)

Android: Settings → System → Reset options → Reset WiFi, mobile & Bluetooth

iPhone: Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings

This erases all saved WiFi passwords, so have them ready.

When DNS Problems Persist

Check If Your ISP Has Outages

Visit DownDetector on mobile data to see if others report problems with your internet provider.

Contact Your ISP

If public DNS servers don’t work, your ISP might have a wider network issue. Call their support line with these details ready:

• When the problem started
• Steps you’ve already tried
• Error messages you see
• Whether other devices work

Check for Malware

Some malware redirects DNS to steal information. Run a full scan with Windows Defender

Hardware Replacement

If your router is over 5 years old and constantly dropping connections, it might be failing. Modern routers handle more devices and offer better range.

Preventing Future DNS Issues

Keep Software Updated

Enable automatic updates for Windows, macOS, and router firmware. Updates patch bugs that cause DNS failures.

Use Reliable DNS Servers

Stick with proven public DNS servers instead of relying solely on your ISP. Set them at the router level for network-wide protection.

Regular Router Restarts

Restart your router monthly to clear memory and refresh connections. Some routers have scheduled restart features.

Monitor Network Health

Pay attention to connection patterns. Problems at specific times suggest ISP issues or network congestion.

Quick Reference: DNS Error Solutions

Problem	Quick Solution	Time Needed
Random disconnections	Restart router	3 minutes
Can’t reach websites	Flush DNS cache	1 minute
ISP DNS down	Switch to 8.8.8.8	5 minutes
Slow DNS lookups	Use 1.1.1.1 (Cloudflare)	5 minutes
Single device affected	Renew IP address	2 minutes
All devices affected	Router firmware update	10 minutes

Frequently Asked Questions

What does “DNS server not responding” really mean?

Your device can’t contact the servers that translate website names into numbers. It’s like having a phone but no phone book to look up numbers. Your internet connection might work, but you can’t reach websites by name.

Why does my DNS fail only on certain devices?

Individual device problems usually come from wrong network settings, outdated drivers, or software conflicts on that specific device. Other devices work because they have correct settings or automatic configuration enabled.

Is it safe to use public DNS servers like Google’s 8.8.8.8?

Yes, public DNS servers are safe and often faster than ISP options. Google and Cloudflare don’t sell your browsing data, but they do see which domains you request. For maximum privacy, use Cloudflare’s 1.1.1.1 or Quad9’s 9.9.9.9.

Can a VPN cause DNS server errors?

Yes. VPNs route your traffic through their own DNS servers. If the VPN’s DNS fails or has wrong settings, you’ll get DNS errors even with working internet. Disconnect your VPN temporarily to test if it’s the cause.

How do I know if the problem is DNS or something else?

Open Command Prompt and type ping 8.8.8.8. If this works but ping google.com fails, you have a DNS problem. If both fail, your internet connection itself is broken, not just DNS.

Summary

DNS server errors stop your internet cold, but most fixes take under 10 minutes. Start by restarting your router, flushing DNS cache, and switching to Google’s 8.8.8.8 or Cloudflare’s 1.1.1.1. These steps solve the majority of DNS problems immediately.

Network settings, outdated drivers, and ISP issues cause most DNS failures. Work through the fixes systematically, starting with the quickest solutions first. Change DNS at the router level to protect all your devices at once.

When simple fixes don’t work, check for ISP outages, scan for malware, or contact your provider. Old routers sometimes need replacement if they constantly drop DNS connections.

Keep your network healthy with regular router restarts, automatic updates, and reliable public DNS servers. These habits prevent most DNS problems before they start.