How to solve DNS errors? This article teaches you to quickly restore the network

daily online, many people have encountered the prompt that the browser cannot access the webpage, and refresh many times has no effect. This situation is mostly related to DNS errors. DNS, as the bridge between domain names and Internet Protocol Addresses, once there is an abnormality, it will cause the device to fail to resolve the website address, thereby blocking network access. This article will find advanced fixes from the basic row, and sort out a complete set of DNS error resolution processes for you, covering computers, mobile phones and other multi-device scenarios, to help you quickly retrieve stable networks.

, how to initially troubleshoot DNS errors?

encounter a situation where the network cannot be accessed, first confirm whether it is really caused by a DNS error to avoid wasting time with blind operations.

1 Test Internet Protocol Address Access

open the browser and enter the public Internet Protocol Address of a well-known website, such as Baidu's 110.242.68.3, if you can access the webpage normally, it means that the network connection itself is no problem. The problem lies in the domain name resolution link, which can basically be determined to be a DNS error. If the Internet Protocol Address cannot be accessed, it may be a network line or hardware failure, and other problems need to be troubleshooted first.

2 Switch network environment test

If the mobile phone encounters problems, you can switch to the mobile data network; if it is a computer, you can try to connect to other WiFi or use the mobile phone hotspot. If the Internet can be used normally after switching, it means that the network environment currently used has a DNS error. If it is still inaccessible, it may be that there is a problem with the DNS settings of the device itself.

How to fix single device DNS error?

After preliminary investigation, it is confirmed that a single device has a DNS error, the problem can be solved by adjusting the DNS settings of the device itself.

1 Reset the local DNS cache

device will automatically cache DNS resolution records when visiting the website. Once the cache records are expired or damaged, a DNS error will be caused. Windows users can press Win + R to open the run window, enter cmd to open the command prompt, and execute the ipconfig /flushdns command to empty the local DNS cache. Mac users can open the end point and enter the sudo killall -HUP mDNSResponder command to complete the reset. After resetting, restart the browser and try to access the website.

2, manually replace the public DNS server

If the automatically obtained DNS server is unstable, you can manually replace it with a public DNS. Common public DNS are Alibaba Cloud's 223.5.5.5, Tencent's 119.29.29.29, and Google's 8.8.8.8. Windows users can find Internet Protocol version 4 in the network connection properties, double-click and select Use the DNS server address below, and enter the corresponding address. Mobile users can find advanced options in WiFi settings to manually set the DNS address. Restart the network after replacement to solve most DNS error problems.

How to solve multi-device DNS errors?

if multiple devices under the same network cannot access the webpage, the probability is that there is a problem with the DNS setting of the router, and the router needs to be adjusted.

1, restart the router to refresh DNS

router running for a long time may cause DNS cache accumulation or abnormal programs, causing DNS errors. Unplug the router, wait 30 seconds before plugging it in. After the router is fully started, let all devices reconnect to the network. In most cases, DNS errors will recover by themselves. This is the easiest and most effective basic repair method, suitable for all user operations.

2, modify the router DNS settings

open the browser and enter the management address of the router, such as 192.168.1.1 or 192.168.0.1, enter the administrator account password to log in, find the DNS settings option, change the automatic acquisition to manually enter the public DNS address, such as Alibaba Cloud's 223.5.5.5 and 223.6.6.6, save the settings and restart the router, all devices connected to the network will use the new DNS server synchronously, completely solve the DNS error problem of multiple devices.

How to deal with DNS errors in special scenarios?

some DNS errors are not caused by conventional reasons, such as browser plug-in interference or firewall restrictions, and need to be dealt with specifically.

1, troubleshooting browser plug-ins or extension

some browser ad blocking or privacy protection plug-ins, may mistakenly intercept DNS resolution requests, resulting in DNS errors. You can try to close all browser plug-ins, or use the browser's privacy mode to open the webpage. If you can access it normally, it means that the problem is caused by the plug-ins. You can check the plug-ins one by one and disable or uninstall them after finding the conflicting plug-ins.

2, check firewalls and security software

the firewall or security software on the computer, it may determine the normal DNS resolution request as malicious behavior to intercept and cause DNS errors. You can temporarily turn off the firewall and security software, and then try to access the webpage. If you can access it normally, you need to add a whitelist of DNS server addresses in the security software, or adjust the security protection level to avoid similar problems in the future.

To sum up, DNS errors are common network failures. When solving them, we should start with preliminary investigation, first confirm the root cause of the problem, and then select the corresponding repair method according to different scenarios such as single device and multi-device. From resetting the cache, replacing the public DNS to adjusting the router settings, we will gradually troubleshoot and deal with them. When encountering DNS errors in special scenarios, we should also pay attention to troubleshooting the impact of browser plug-ins and security software. As long as you follow this process, you can quickly solve DNS errors and restore stable network access.