What should I do if the DNS server resolves abnormalities? Solutions to common problems

in the process of daily use of the network, many people have encountered the situation that the network connection is normal, but the specific website cannot be opened, the webpage loads slowly or even prompts that it cannot be accessed. This is most likely that the DNS server resolution is abnormal. As the "translator" of network access, DNS server resolution is responsible for converting the domain name into the Internet Protocol Address that the device can recognize. Once a failure occurs, it will directly affect the network usage experience. This article will dismantle the common causes, troubleshooting methods, repair solutions and daily protection skills of DNS server resolution abnormalities to help you quickly solve network problems and restore a smooth Internet experience.

What are the causes of abnormal DNS server resolution?

want to solve the abnormal problem of DNS server resolution, we must first clarify the root cause of the failure, and different incentives correspond to different solutions.

1, local network environment interference

the router runs for a long time, the cache is overloaded, the network line is loose or the WiFi signal is unstable, which may interfere with the normal resolution of the DNS server. For example, the router has not been restarted for several weeks, and the old resolution data of the cache is piled up, which will cause the new domain name request to not be processed correctly, and then the resolution timeout will occur.

2, operator DNS server failure

many users default to the DNS server provided by the operator. Once the operator's server has maintenance, downtime or regional network failure, it will directly cause DNS server resolution abnormalities. In this case, multiple users under the same operator will have similar network problems, rather than the failure of a single device.

3, malicious software or virus attacks

some malicious software can tamper with the DNS settings of the device, directing the domain name to phishing websites or fake Internet Protocol Addresses, resulting in DNS server resolution errors. In addition, virus attacks can also damage the network configuration file of the device, making DNS requests unable to be sent and received normally.

How to quickly troubleshoot DNS server resolution abnormalities?

when it is suspected that the DNS server resolution abnormality causes the network failure, the problem can be quickly located through a few simple steps to avoid wasting time by blind operation.

1, use the ping command to detect basic connectivity

type "ping common domain name" in the command prompt of the computer, and if it returns request timed out, try to ping the known Internet Protocol Address corresponding to the domain name. If the Internet Protocol Address can ping but the domain name does not, you can determine that there is a problem with the DNS server resolution; if the IP cannot ping, it may be a failure of the network connection itself.

2, replacement equipment verification fault range

use other devices under the same network to try to access the same website, if other devices also have the same problem, indicating that the fault may be on the router or operator DNS server; if only the current device is abnormal, the probability is that the DNS server resolution is abnormal due to the device's own DNS settings or system problems.

3, testing public DNS servers

manually switch the DNS server of the device to public DNS, such as domestic 114.114.114.114 or foreign 8.8.8.8, and then try to access the website. If it can be accessed normally, it means that the original DNS server used is faulty, which further verifies the judgment of abnormal DNS server resolution.

How to fix the DNS server resolution abnormality?

determine the root cause of the DNS server resolution abnormality, you can take targeted repair measures to quickly restore the normal use of the network.

1 Reset the local network configuration

first restart the router and device, clear the network cache, most minor DNS server resolution exceptions can be solved by this simple operation. If the restart is invalid, you can enter "ipconfig /release" "ipconfig /renew" "ipconfig /flushdns" command in the command prompt of the computer to release the old Internet Protocol Address, get the new address and empty the local DNS cache.

2, replace reliable public DNS servers

If the operator's DNS server fails, you can manually replace it with a public DNS server. In the device's network settings, find the DNS server address option and replace the default address with public DNS addresses such as 114.114.114.114 and 1.1.1.1. These servers are usually more stable and can effectively avoid abnormal DNS server resolution.

3, kill malicious software repair system settings

if it is suspected that the DNS server resolution is abnormal caused by malicious software, you can use professional antivirus software to comprehensively kill the device, remove the malicious program, and then manually restore the tampered DNS settings. The network settings of some systems also provide the "reset network" function, which can restore the initial network configuration with one click to solve the resolution failure caused by the wrong setting.

How to prevent DNS server resolution abnormalities?

solve the abnormal problem of DNS server resolution, daily protection can effectively reduce the recurrence probability of failure and maintain a long-term stable network experience.

1, clean DNS cache regularly

recommend manually cleaning the DNS cache of devices and routers once a month to avoid the accumulation of old resolution data affecting the processing of new requests. Some high-end routers support the function of automatic cache cleaning, which can be turned on in the settings to reduce the trouble of manual operation and reduce the risk of DNS server resolution abnormalities from the source.

2, use dual DNS server configuration

in the network settings of the device, the primary DNS server and the standby DNS server are set at the same time. When the primary server has an abnormal DNS server resolution, the device will automatically switch to the standby server to ensure the continuity of network access. The primary server can choose the address provided by the operator, and the standby server uses the public DNS address, taking into account speed and stability.

3, install cyber security protection software

install regular cyber security protection software and turn on real-time monitoring function, which can effectively intercept the tampering of DNS settings by malicious software and avoid abnormal DNS server resolution caused by virus attacks. At the same time, the software can also detect the network environment in real time and remind users of potential network risks in a timely manner.

To sum up, abnormal DNS server resolution is a common network failure, and its causes cover many aspects such as local network interference, operator server failure, and malicious software attacks. Through targeted investigation methods, the root cause can be quickly located, and then measures such as resetting network configuration, replacing public DNS, and killing malicious software can be effectively repaired. Daily protection work such as regular cache cleaning, dual DNS configuration, and installation of security software can greatly reduce the probability of abnormal recurrence and ensure a smooth network experience.