Self HelpBoise Computer Care

Wi-Fi & networking

DNS server not responding

'DNS server not responding' or DNS_PROBE errors? Flush DNS, renew your IP, try public DNS like 1.1.1.1, and rule out VPNs and security apps.

Difficulty
Medium
Time
10-15 min
Steps
6
Updated

Sounds like this?

  • 'DNS server isn't responding'
  • DNS_PROBE_FINISHED_NXDOMAIN
  • Some sites load, others don't
  • Apps can't connect but Wi-Fi shows connected

Step by step

  1. Restart the router and the device.
  2. Windows: open Terminal (Admin) and run ipconfig /flushdns, then ipconfig /release and ipconfig /renew.
  3. Mac: restart the Mac, or in Terminal run sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder.
  4. Try a public DNS for a test: Windows, Settings › Network & internet › Wi-Fi › your network's properties › DNS server assignment › Edit › Manual, enter 1.1.1.1 and 8.8.8.8.
  5. Disable VPNs, web protection features in antivirus, and parental-control apps for a test.
  6. If it works with public DNS, your provider's DNS or router is the issue.

Related error codes & messages

Quick answers

When should I stop and get professional help with "DNS server not responding"?

Stop and get help if: Every device in the house fails DNS. DNS settings keep changing back to unknown servers (possible router or device malware). Boise Computer Care can diagnose it for a $60 fee; call 208-996-3508.

How long does this fix take and how hard is it?

Plan on 10-15 min. Difficulty: Medium.

Is it safe to try this myself?

Mostly, if you follow these precautions: Write down any custom network settings before changing them so you can undo it.

Which error messages or codes does this guide cover?

DNS server isn't responding, DNS_PROBE_FINISHED_NXDOMAIN, DNS_PROBE_FINISHED_BAD_CONFIG, ERR_NAME_NOT_RESOLVED.

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