DNS, or Domain Name System, is a vital component of the internet infrastructure, translating user-friendly domain names into machine-readable IP addresses. When DNS fails, websites, email, and other online services become unreachable.
Step-by-Step DNS Troubleshooting
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Check TCP/IP Settings: Confirm your computer uses the correct DNS servers in the network settings.
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Flush DNS Cache: Clear any outdated DNS records with the command:
ipconfig /flushdns
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Release and Renew DHCP Lease: Reset network configuration to get new DNS addresses with:
ipconfig /release
ipconfig /renew
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Use Different DNS Servers: If issues persist, try other DNS servers like Google Public DNS or Cloudflare DNS.
Changing DNS Servers on Windows
- Open Control Panel > Network and Internet > Network and Sharing Center > Change adapter settings.
- Right-click your connection > Properties > Internet Protocol Version 4 (TCP/IPv4) > Properties.
- Enter the new DNS addresses and click OK.
Changing DNS Servers on macOS
- Open System Preferences > Network > Select your connection > Advanced > DNS.
- Click "+" to add new DNS server addresses and confirm with OK.
Additional Tips
If the problem persists after these steps, consider contacting your ISP. Also, check your VPN settings, restart your devices, and ensure your custom DNS configurations are correct. Tools like DNS lookup can further verify DNS resolution.