What are the solutions to dns resolution failure?

Solutions to dns resolution failure: 1. Refresh the DNS cache; 2. Change the DNS server; 3. Check the firewall settings; 4. Check the network connection; 5. Update the network driver; 6. Restart the router and modem ; 7. Contact ISP; 8. Use command line tools for diagnosis; 9. Check DNS settings; 10. Clear browser cache. Detailed introduction: 1. Refresh the DNS cache. You can try to refresh the computer's DNS cache. In Windows systems, you can open a command prompt and so on.

DNS (Domain Name System) resolution failure means that when you try to access a website or service, your computer cannot convert the domain name into an IP address, and therefore cannot establish a connection. This may prevent you from accessing certain websites, services or applications. Solving the problem of DNS resolution failure requires you to comprehensively check and adjust the network connection, DNS configuration, firewall settings and ISP (Internet Service Provider). Here are some possible solutions:

1. Flush the DNS cache:

First, you can try flushing your computer's DNS cache. In Windows systems, you can open a command prompt and enter the command "ipconfig /flushdns" to flush the DNS cache. In Mac systems, you can use the command "sudo killall -HUP mDNSResponder" to flush the DNS cache. Flushing the DNS cache can clear old DNS records and help you regain the latest DNS information.

2. Change the DNS server:

If your DNS resolution fails, it may be due to a problem with the DNS server you are currently using. You can try changing to other public DNS servers, such as Google's 8.8.8.8 and 8.8.4.4, or Cloudflare's 1.1.1.1 and 1.0.0.1. You can manually change the DNS server address in the network settings and then try to connect to the website or service.

3. Check the firewall settings:

Sometimes, the firewall settings may prevent DNS resolution. You can try turning off the firewall temporarily and try connecting to the website or service again. If the connection is successful, you need to reconfigure the firewall rules to ensure that DNS requests can pass normally.

4. Check the network connection:

Make sure your network connection is working properly. You can try to connect to other websites or services to check whether only a specific website or service is inaccessible. If other websites or services cannot be accessed, there may be a problem with your network connection, and you need to contact your ISP for troubleshooting.

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5. Update the network driver:

If you are using a wired or wireless network connection, you can try updating the driver of the network adapter. Sometimes old or corrupt network drivers can cause DNS resolution to fail.

6. Restart the router and modem:

Sometimes, failure of the router or modem will also cause DNS resolution to fail. You can try restarting the devices and trying to connect to the website or service again.

7. Contact your ISP:

If none of the above methods can solve the problem, there may be a problem with your ISP, causing DNS resolution to fail. You can contact your ISP for more information and assistance.

8. Use command line tools for diagnosis:

You can use command line tools such as nslookup or dig to troubleshoot DNS resolution. These tools can help you see how a specific domain name is being resolved to better locate the problem.

9. Check DNS settings:

Make sure your computer’s DNS settings are correct. You can manually configure the DNS server addresses in your network settings to make sure they are correct.

10. Clear browser cache:

Sometimes, browser cache can also cause DNS resolution to fail. You can try clearing your browser cache and trying to connect to the website or service again.

To sum up, DNS resolution failure may be caused by a variety of reasons, including network settings, DNS configuration, firewall issues or ISP failures, etc. You can check one by one according to the above methods and hope to solve your problem. If the problem still cannot be solved, it is recommended to contact professional technical support personnel for further diagnosis and solution.

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