What should I do if the domain name resolution is wrong? Detailed reasons and handling methods

in the process of daily visiting websites or building sites, many people have encountered situations where websites cannot be opened and browsers prompt that they cannot connect. Among them, domain name resolution errors are one of the core reasons for such problems. Domain name resolution errors will not only affect the normal browsing experience of ordinary users, but also bring traffic loss and brand damage to webmasters. This article will comprehensively sort out the common causes of domain name resolution errors and give targeted solutions to help different groups quickly troubleshoot and solve such problems and restore the normal operation of network services.

What conditions can cause a domain name resolution error?

to solve the problem of domain name resolution errors, it is first necessary to clarify what factors will trigger such failures, and understand the logic of the problem from the root cause.

1, DNS server failure

domain name resolution relies on the DNS server to complete the conversion of the domain name to the Internet Protocol Address. When the local DNS server or the authoritative DNS server corresponding to the domain name used by the user is down, overloaded or the network is congested, it will directly lead to domain name resolution errors. For example, during the maintenance of the DNS server of the local operator, a large number of users will have the problem that the domain name cannot be resolved at the same time. Such failures are usually regional.

2, parsing record configuration errors

when the webmaster configures the resolution record in the background of the domain name management, if there are problems such as wrong record type selection, wrong Internet Protocol Address filling, and unreasonable TTL value setting, it will also cause domain name resolution errors. For example, misconfiguring the A record as a CNAME record, or filling in the Internet Protocol Address does not match the actual IP of the server, will make the DNS server unable to complete the correct resolution conversion.

3, domain name status is abnormal or has expired

when the domain name is in an abnormal state such as no real-name authentication, suspended resolution, expired and not renewed, the domain name resolution error will also appear. Domestic domain names require real-name authentication to be completed in order to use them normally. If the authentication is not completed within the specified time, the domain name will be forcibly suspended, and the normal IP conversion cannot be completed.

How to initially troubleshoot domain name resolution errors?

encounter the domain name resolution error, without blind operation, you can initially troubleshoot the problem through a few simple steps to narrow the scope of the fault.

1, use the ping command to detect the parsing result

enter ping plus domain name instructions in the command prompt window of the computer. If the return result shows that the host cannot be found, or the returned Internet Protocol Address does not match the actual server IP, it means that there is a domain name resolution error. This command can quickly confirm whether there is a problem in the resolution process or the failure of the server itself.

2, replace the DNS server and try again

if it is suspected that the domain name resolution error is caused by the local DNS server, you can replace the DNS server of the device with public DNS, such as 114.114.114.114 or 8.8.8.8, and then try to access the website again. If the replacement can be accessed normally, you can determine that the problem is on the original DNS server.

3, query domain name resolution record status

through the online DNS query tool, enter the domain name to view the effective status of various resolution records, including record type, corresponding IP, TTL value and other information. If the query results are inconsistent with the records configured in the background, it means that the resolution records are not effective normally, which is also a common cause of domain name resolution errors.

3. Targeted solutions to domain name resolution errors?

after clarifying the cause of the wrong domain name resolution, you can take corresponding solutions according to the specific situation and quickly restore the normal resolution function of the domain name.

1 Fix DNS server related issues

if it is determined that the domain name resolution error is caused by the local DNS server, you can try to refresh the local DNS cache first, and enter the ipconfig /flushdns instruction at the command prompt to complete the cache cleaning. If the problem is still not solved after the refresh, you can switch to a stable public DNS server for a long time to avoid resolution problems caused by local DNS failures again. If the authoritative DNS server fails, you need to contact the domain name registrar or DNS service provider to assist in troubleshooting and repairing.

2, fix the domain name resolution record configuration

log in to the domain name management background, check the configuration information of the resolution records one by one, and confirm that the record type matches the requirements. For example, A records or AAAA records are required to build a website, and CNAME records or URL forwarding records are required for jumping services. At the same time, check whether the Internet Protocol Address is accurate. The TTL value can be adjusted according to needs. If it needs to take effect quickly, the TTL value can be set to within 300 seconds. After the configuration is completed, wait for the record to take effect to solve the domain name resolution error.

3 Restore the normal state of the domain name

If the domain name resolution is wrong due to the lack of real-name authentication, the real-name authentication materials need to be submitted in the background of the domain name registrar in time, usually 1-3 working days to complete the review and resume the resolution. If the domain name has expired, the renewal needs to be completed within the grace period. If the expiration time is long, you may need to submit a redemption application. After restoring the ownership of the domain name, the resolution records can be configured normally.

4. How to prevent domain name resolution errors from happening again?

resolve the domain name resolution errors that have occurred, preventive measures need to be taken to reduce the probability of such failures recurring and ensure the stable operation of the website.

1 Choose a stable DNS service provider

the stability of the authoritative DNS server directly affects the reliability of domain name resolution, it is recommended to choose a professional DNS service provider with multi-node deployment and high defense capabilities to avoid domain name resolution errors caused by single node failure. At the same time, the main and standby DNS servers can be configured. When the main server fails, the standby server can automatically take over the resolution service.

2. Regularly check the parsing record status

webmaster can check the effective status of the domain name resolution record through the online tool every week or every month, check whether the record information is consistent with the background configuration, and find and correct potential configuration problems in time. In addition, after the server IP is changed and the business is adjusted, the analysis record should be updated as soon as possible, and a shorter TTL value should be set to ensure quick effect and avoid domain name resolution errors.

3, open the domain name status monitoring service

many domain name service providers provide domain name status monitoring function, real-time monitoring of the domain name resolution status, expiration time, real-name authentication status and other information, when the domain name resolution error, domain name is about to expire and other abnormal situations, will be notified by SMS or email users, so that users can intervene in the first time to avoid the expansion of the fault.

To sum up, domain name resolution errors are common failures that affect website access, and their causes cover many aspects such as DNS server failures, resolution record configuration errors, and abnormal domain name status. Through targeted troubleshooting methods, the root cause of the problem can be quickly located, and then measures such as repairing DNS servers, correcting resolution records, and restoring domain name status can be taken to solve the fault. At the same time, daily monitoring and prevention work can effectively reduce the probability of domain name resolution errors and ensure the stable operation of network services.