What should I do if there is an error in the DNS configuration? Repair DNS configuration steps and precautions

in daily network use, many people have encountered problems such as page loading timeout, domain name cannot be resolved, and network intermittent. A large part of the reason is that DNS configuration is abnormal. DNS, as the core bridge between domain name and Internet Protocol Address conversion, will directly block the normal communication between the device and the network once the configuration is wrong. This article will introduce practical methods and key precautions for repairing DNS configuration from fault troubleshooting, multi-platform operation, verification and maintenance, etc., to help you quickly restore a stable network environment.

1. What troubleshooting needs to be done before repairing DNS configuration?

before starting to repair the DNS configuration, do a good job of basic troubleshooting to avoid invalid operations and accurately locate the root cause of the problem.

1, first confirm the network hardware status

first check whether the router, light cat and other network devices are running normally, check whether the device indicator is in a stable state, if the red light flashes or abnormally goes out, you can try to restart the device and then test the network. At the same time check whether the network cable connection is firm, whether the WiFi signal is stable, eliminate network abnormalities caused by hardware failures, and avoid mistaking hardware problems as DNS configuration failures to deal with.

2 Test basic network connectivity

test network connectivity through the ping command, enter the ping 8.8.8.8 in the computer CMD window, if you can receive a reply normally, it means that the basic connection between the device and the extranet is normal, and the problem is likely to occur in the DNS configuration; if you can't receive a reply, it may be The network link is faulty, and you need to solve the network connectivity problem before dealing with the DNS configuration.

How to repair DNS configuration in Windows?

Windows is the most widely used desktop system, master the method of repairing DNS configuration under Windows system, and can solve the network failure problem of most users.

1 Automatically obtain DNS configuration reset

open the Network and Internet option in Windows Settings, find the currently connected network, click Change Adapter option, right-click the network connection you are using to select Properties, find Internet Protocol version 4, double-click to enter and select Automatically get DNS server address, click OK to save settings. This method allows the device to get the correct DNS configuration from the router again, which is suitable for failures caused by manual configuration errors.

2, manually replace the public DNS server

If the automatically obtained DNS configuration still cannot solve the problem, you can try to manually replace the public DNS server. Commonly used public DNS are Google 8.8.8.8, 8.8.4.4, domestic Ali 223.5.5.5, 223.6.6.6. Select the following DNS server address in the properties of Internet Protocol Version 4, enter the corresponding address and save it to complete the repair of DNS configuration.

How to repair DNS configuration for Mac and mobile end?

in addition to Windows systems, Mac computers and mobile devices may also have DNS configuration failures, and the corresponding repair DNS configuration methods are also different.

1, Mac system repair DNS configuration steps

open the Mac system preferences, click Network Options, select the network type currently connected, click the Advanced button to switch to the DNS tab, click the plus button in the lower left corner, enter the public DNS server address, and delete the original abnormal DNS address. After the settings are completed, click Apply. You can also click the "Restore Default" button at the bottom of the DNS tab to restore the default DNS configuration of the system.

2, mobile end repair DNS configuration method

For Android devices, you can find the currently connected network in the WiFi settings, click Modify Network, tick Show Advanced Options, change the IP settings to static, and then enter the public DNS address in DNS1 and DNS2 to save. For Apple phones, you need to enter the WiFi page in the settings, click the exclamation mark after the current WiFi name, select Configure DNS, manually add the public DNS address or switch to automatic configuration to complete the operation of repairing the DNS configuration.

How to verify and maintain after repairing DNS configuration?

complete the operation of repairing DNS configuration, it cannot be ended directly, and it is also necessary to do a good job of verification and daily maintenance to ensure the long-term stable operation of the network.

1, verify the DNS configuration repair effect

first try to open multiple commonly used websites to see if they can be loaded normally, you can also use the nslookup command to test the domain name resolution, enter the nslookup www.baidu.com in the CMD window, if the corresponding Internet Protocol Address can be returned normally, indicating that the DNS configuration is successfully repaired. At the same time, continuously observe for 10 to 15 minutes to confirm that the network does not appear abnormal again, to avoid the situation of failure after short recovery.

2, daily maintenance of DNS configuration precautions

daily use, try to avoid modifying DNS configuration at will. If you need to modify, choose a reliable public DNS server first, and avoid using DNS addresses from unknown sources. Regularly check the DNS configuration status. If there is a network abnormality again, you can first check whether the DNS configuration has changed. At the same time, timely update the system and router firmware to reduce the risk of abnormal DNS configuration caused by system vulnerabilities.

To sum up, repairing DNS configuration is the core operation to solve network domain name resolution failures. From the early hardware troubleshooting, connectivity testing, to the specific repair steps of multiple platforms, to the later verification and maintenance, each link is crucial. You can operate according to your own device type and the corresponding method, you can quickly solve the abnormal problem of DNS configuration and restore a stable and smooth network experience. Daily attention should also be paid to maintaining DNS configuration to reduce the probability of failure recurrence.