What are the common problems with configuring DNS addresses? Quick look at the solution

in daily network use, DNS addresses play a key role in the conversion of domain names and Internet Protocol Addresses. Once there is a problem with the configuration, it will cause failures such as slow loading of web pages, inability to resolve domain names and even disconnection from the network. Many users often encounter various problems due to irregular operation and lack of understanding of principles when configuring DNS addresses, but they do not know how to solve them. This article will sort out the high-frequency problems in the process of configuring DNS addresses, and give clear and feasible solutions combined with actual operation scenarios to help users efficiently troubleshoot and solve related network faults.

What are the errors in configuring DNS addresses?

many users configure DNS address error, often because of the operation errors, these errors seem small but will directly affect the configuration effect.

1, choose the public DNS address

many users for convenience, they will directly search for popular public DNS addresses on the Internet to configure, but ignore the network adaptability of different regions and operators. Some public DNS may have high latency and unstable resolution in a specific network environment, which will reduce the network experience. Before configuring the DNS address, you should test the response speed of the target DNS and choose the address that adapts to your own network.

2, ignore the matching settings of the primary and secondary DNS

some users only set the primary DNS address when configuring the DNS address, and do not configure the alternate DNS address. When the primary DNS server fails or the response times out, the problem of domain name resolution failure will directly occur. The correct way is to configure two different DNS addresses at the same time. When the primary DNS cannot work normally, the system will automatically switch to the alternate DNS to ensure the continuity of network resolution.

2. Common reasons for failure to configure DNS addresses?

DNS address configuration can not take effect normally, is a high frequency problem encountered by users, there are often clear triggering reasons behind.

1, the entered DNS address format error

DNS address is composed of four numbers, and the segments are separated by English dots. When some users configure DNS addresses, it is easy to enter Chinese dots, lose more and lose less numbers or have segment number errors, resulting in the system not being able to recognize the address. After the configuration is completed, carefully check the address format to ensure that each number is between 0 and 255, and the overall format conforms to the specification.

2, network devices limit DNS configuration

some enterprise networks or operators customize routers, users will be restricted from configuring DNS addresses by themselves, and the designated DNS server will be forced to be used. In this case, the DNS address manually configured by the user will not take effect. You need to contact the network administrator or operator to lift the restriction, or configure the DNS address through the special settings entrance in the background of the router.

How to troubleshoot abnormalities after configuring DNS addresses?

configure the DNS address, it is necessary to gradually investigate through scientific methods in order to quickly locate the root cause of the problem.

1, use the ping command to test connectivity

configure the DNS address, you can test the connectivity of the DNS server through the ping command that comes with the system. Enter ping plus the target DNS address in the command prompt. If the return timeout or packet loss rate is too high, it means that the DNS server cannot be connected normally, and other available DNS addresses need to be replaced. If the connection is normal, the fault problem of the DNS server itself can be eliminated.

2, through the nslookup command test parsing

nslookup command can directly test the effect of domain name resolution, after configuring the DNS address, enter nslookup plus common domain name, if the corresponding Internet Protocol Address can be returned normally, indicating that the DNS resolution function is normal; if the prompt cannot be resolved is returned, you need to check whether the configured DNS address is correct, or whether there is a network firewall to intercept the resolution request.

What are the optimization techniques for configuring DNS addresses?

In addition to solving common problems, mastering some optimization skills can make the configuration of DNS addresses more ideal, improve network stability and speed.

1 Switch DNS addresses according to network scenarios

different network scenarios have different needs for DNS, for example, when using the operator's network at home, the exclusive DNS address provided by the operator can be configured to resolve the local domain name faster; in the office network, if you need to access the internal server, you should configure the internal DNS address of the enterprise. Users can flexibly switch the adapted DNS address according to the current network environment to obtain a better resolution experience.

2, clean DNS cache regularly

configure the DNS address, the system will cache the previous resolution records. If the cache is not timely updated, there may be abnormal resolution. It is recommended to regularly clean the DNS cache by entering the ipconfig/flushdns command from the command prompt, so that the newly configured DNS address can take effect quickly, and at the same time avoid resolution errors caused by old cache records.

To sum up, configuring DNS addresses is a key operation to ensure normal network resolution. From avoiding operation errors, troubleshooting configuration failures, to anomaly detection and optimization skills, each link has details that need to be paid attention to. When users configure DNS addresses, they must not only master the correct operation methods, but also learn to troubleshoot problems in a targeted manner, and optimize them in combination with their own network scenarios in order to effectively solve various faults and obtain a stable and smooth network experience.