It’s infrequently, of course, but sometimes users try to access Internet sites when they see a browser installed in the system that says that the DNS server is not responding. Not every user knows what to do to fix the problem, but meanwhile there are several simple solutions, which will be discussed later.
Why do we need DNS servers?
First, a little theory. What is a DNS server? In fact, it is a kind of interpreter that makes it possible to convert the numerical addresses of Internet resources into letter designations of domain names.
This saves the user from the complicated procedure of remembering and entering the address of the resource in numerical terms. This is too inconvenient. After all, many people know that today an address is entered in a string, consisting of letters, numbers and other characters with an addition in the form of a domain, which looks much easier in practice.
Possible performance issues
Now let's look at some problems when, for some reason, the DNS server is not responding. What to do to troubleshoot, it becomes clear if you look at the causes of failures.
As a rule, among all that can cause failures, problems are mentioned by the provider, incorrect TCP / IP parameters, the effects of viruses, spontaneous changes in the parameters of specific software, etc.
DNS server is not responding: what to do (Windows 7)?
The first thing to do when such problems occur is to check the activity of the DNS client. To do this, use the services section, which can be accessed by entering the services.msc command in the Run menu (Win + R).
Here you need to find a line indicating the DNS client and look at the type of startup used. The value must be set to automatic. If something else is set, the parameter will have to be changed by right-clicking on the menu where the property string is selected.
But this is far from all that can correct the situation if the DNS server does not respond. What to do when a message appears? You need to check the correctness of the TCP / IPv4 parameters (this protocol is used most often). To do this, you need to enter the network properties section from the network management section. Then call the window for changing the adapter properties, specify the desired connection and use the connection properties where you need to find the appropriate protocol.
When calling its properties, you should look at the set parameters. In most cases, the provider provides automatic value assignment services, but sometimes they need to be manually entered. In the lines of the preferred and alternative DNS server, you just need to enter the correct values and save the changes to the configuration.
DNS server does not respond: what to do? Rostelecom
However, even after this, the problem may not disappear. In particular, this concerns the Rostelecom provider, which provides its own parameters for configuration. But they may not work, and the system will again issue a warning that the DNS server is not responding. What to do in this case? Use a different (alternative) configuration.
For example, you can rebuild access by specifying the DNS servers of Google services. To do this, you need to enter the following parameters in the properties of the above protocol in the server value lines: for the preferred one, two digits 8 and two digits 4, for the alternative one - four digits 8. There is nothing wrong with swapping the values for the alternative and preferred server.
Finally, if this option does not work, you can do a full reset and update the configuration. To do this, use the command line, run at the administrator level, in which the ipconfig / flushdns command is written first, then ipconfig / registerdns, then ipconfig / release, and finally ipconfig / renew. After entering each line, the Enter key is pressed.
Conclusion
It remains to add that at least one of the above solutions will resolve the problems with the DNS settings. However, this did not address issues related to virus exposure or the fact that some types of software that require constant access to the network can spontaneously change the configuration (for example, during a permanent license check). Here you have to use completely different methods.