DNS resolution problems.

DNS resolution problems can be frustrating, but there are several steps you can take to troubleshoot and resolve them. Here's a guide to help you address DNS issues:

1. Check Network Connection:
   • Ensure that your device is connected to the network, and there are no physical connection issues with your router or modem.
2. Verify DNS Server Settings:
   • Make sure your device is configured to use the correct DNS servers. You can use public DNS servers like Google's (8.8.8.8 and 8.8.4.4) or Cloudflare's (1.1.1.1 and 1.0.0.1).
3. Flush DNS Cache:
   • Open a command prompt (Windows) or terminal (macOS/Linux) and type ipconfig /flushdns (Windows) or sudo dscacheutil -flushcache (macOS).
4. Check DNS Configuration Files (Linux):
   • If you're using a Linux system, make sure that /etc/resolv.conf is correctly configured with valid DNS server addresses.
5. Try a Different Device:
   • If possible, try to access the internet from another device on the same network. This can help determine if the issue is specific to one device or affecting the entire network.
6. Check Router Configuration:
   • Ensure that your router is set up to provide DNS correctly. It may have its own DNS settings that need to be configured.
7. Check Firewall or Security Software:
   • Some firewalls or security software may block DNS queries. Make sure that your security software is not interfering with DNS resolution.
8. Check for Malware or Viruses:
   • Malware or viruses can sometimes interfere with DNS resolution. Perform a thorough scan of your system.
9. Try a Different DNS Provider:
   • If you're using your ISP's DNS servers, consider switching to a different provider (like Google's or Cloudflare's) to see if that resolves the issue.
10. Check for DNS Hijacking:
    • Some ISPs or malicious software can redirect DNS requests. Use a tool like DNS Benchmark to test the speed and reliability of different DNS servers.
11. Check Domain Name Spelling:
    • Ensure that you've entered the domain name correctly. Typos can lead to DNS resolution failures.
12. Ping the DNS Server:
    • Open a command prompt or terminal and try to ping the DNS server. This can help determine if there's a problem with the connection to the DNS server.
13. Check DNS Forwarders (for DNS Servers):
    • If you're running your own DNS server, ensure that the forwarders are configured correctly to resolve external domain names.
14. Restart DNS Services:
    • If you're running a local DNS server, try restarting the DNS service.
15. Contact Your ISP or DNS Provider:
    • If none of the above steps work, contact your Internet Service Provider or DNS provider for further assistance.

Remember to document any changes you make, and be cautious when making adjustments to network settings. If you're unsure about any step, consider seeking help from a network administrator or IT professional.