How does DNS repair work? Complete steps and precautions explained in detail

in the process of daily use of the network, many people have encountered problems such as slow loading of webpages, inability to resolve domain names, and frequent jumping to error pages. Most of these failures are related to abnormal DNS configuration. As a domain name resolution system in the network, once a problem occurs, it will directly affect the fluency and even availability of network access. This article will introduce the specific operation steps of DNS repair, fault identification methods and related precautions to help users quickly troubleshoot and solve DNS-related network failures and restore stable network connections.

How to determine whether DNS repair is required?

before DNS repair, it is first necessary to clarify whether the current network failure is indeed caused by DNS problems and avoid doing useless work.

1, through the ping command preliminary investigation

press the Win + R key to open the running window, enter cmd to open the command prompt, and enter ping 8.8.8.8 in the window. If you can receive a reply normally, it means that there is no problem with the network connection itself; then enter ping www.baidu.com. If there is a request timed out or the prompt that the domain name cannot be resolved, it can be basically determined that it is a DNS failure and needs to be repaired by DNS.

2, observe the network failure performance

if all web pages cannot be loaded normally, but the chat software can send and receive messages normally, or the failure of domain name resolution occurs on multiple devices under the same network at the same time, it is also likely that the DNS configuration is abnormal. At this time, DNS repair has become the key to solve the problem.

How does the Windows system perform DNS repair?

Windows is currently the most widely used desktop system, its DNS repair operation has a variety of ways, users can choose the appropriate method according to their own situation.

1. Manually fix

open the Network and Internet option in the system settings, select the currently connected network, click Change Adapter option, right-click the network connection you are using to select Properties, find Internet Protocol version 4 and double-click, select Use the following DNS server address, enter the public DNS address, such as domestic 114.114.114.114, foreign 8.8.8.8, click OK after the setting is completed to complete the basic DNS repair.

2, fix

open the command prompt as an administrator, enter ipconfig /release release the current IP and DNS configuration, then enter ipconfig /renew get a new configuration, and finally enter ipconfig /flushdns empty the local DNS cache, this series of commands can complete the depth of DNS repair, solve most of the domain name resolution problems caused by cache exceptions.

Third, the Mac system DNS repair operation steps

Mac the DNS repair process of the system is different from that of Windows, it needs to be operated in the system preferences, and the overall steps are relatively simple.

1, manually modify the DNS server address

click the Apple icon in the upper left corner of the desktop, select System Preferences, open Network Options, click the currently connected network, then click the Advanced button, switch to the DNS tab, click the plus button in the lower left corner, enter the public DNS address you want to use, such as 114.114.114.114 or 223.5.5.5, and finally click OK to complete DNS repair and replace abnormal DNS configuration.

2, clear the DNS cache to complete the repair

open other folders in the boot station, find end point and open it, enter the corresponding cache cleaning command according to the Mac system version, such as Ventura and above enter sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder, enter the administrator password and execute the command to complete DNS repair and clear the local abnormal DNS cache data.

4. Verification and precautions after DNS repair

complete the DNS repair operation, you can't directly default that the problem has been solved, and you need to verify it, and pay attention to some details to avoid the failure from recurring.

1, verification method after DNS repair

use the ping command again to test the resolution of commonly used domain names, such as ping www.taobao.com, if you can receive a reply normally, indicating that the DNS repair has taken effect; at the same time try to open multiple different types of web pages to confirm whether the page loading speed and jump are normal, to ensure that network access is fully restored.

2, DNS repair key considerations

DNS repair, to choose a reliable public DNS server, avoid the use of unknown DNS address, to prevent cyber security risks; in addition, regular cleaning of the local DNS cache is also an effective way to prevent DNS failure, it is recommended to clean the cache once a month, reduce the need for DNS repair; if multiple devices under the same network have DNS failure, DNS configuration may be abnormal router, then you need to log in to the router background DNS repair operation.

To sum up, DNS repair is the core operation to solve domain name resolution network failures. Users can determine whether DNS repair is required by means of ping commands, etc., and then select the corresponding operation steps according to the Windows or Mac system they use. After completing the repair, it is also necessary to verify to ensure that the fault is resolved. At the same time, keep in mind the precautions of choosing a reliable DNS address and regularly cleaning the cache, which can effectively reduce the occurrence of DNS failures and maintain a stable network access experience.