What does DNS shutdown mean? The impact of DNS shutdown and operating instructions

in daily network use, the DNS system is like a "navigation map" of the network world, silently completing the conversion of domain names and Internet Protocol Addresses, allowing us to easily access various websites. However, many users will encounter problems related to DNS shutdown, but they have little understanding of its concept, impact and operation. This article will start from the definition of DNS shutdown, analyze its impact on the network in depth, and give the operation methods on different devices to help you fully grasp this network setting point.

What does DNS shutdown mean?

to understand the practical significance of DNS shutdown, we must first clarify the basic role of the DNS system in order to accurately grasp the core connotation of DNS shutdown.

1, the core definition of DNS shutdown

DNS shutdown does not directly shut down the entire public DNS service, but means that the user actively or passively deactivates the DNS server configuration specified on the device, and no longer completes the domain name resolution work through the server. Simply put, the device gives up the original reliance on the "navigator" and temporarily loses the directional channel of domain name to IP.

2, DNS shutdown two trigger scenarios

DNS off is divided into active and passive two cases, active DNS off is more users to replace the better DNS server, troubleshooting network failures and other purposes of manual operation; passive DNS off may be because of DNS server failure, network operator restrictions, or equipment system automatically detected DNS abnormality after the suspension of the configuration.

What are the network effects of DNS shutdown?

DNS system is the key link of network access, DNS shutdown will inevitably have a series of direct or indirect effects on network usage, which cover multiple levels from basic access to advanced functions.

1 Core barriers to basic network access

The most direct impact of

DNS closure is that the website cannot be accessed normally through the domain name, because the device loses the resolution channel of domain name to IP, and the system cannot locate the corresponding server address after entering the URL, which will directly display the inaccessible error page. However, if the user knows the Internet Protocol Address of the website, it can still be accessed directly through IP, but this method is not practical for ordinary users.

2, network service function limitations

in addition to web page access, DNS shutdown will also affect various types of network services that rely on domain name resolution, such as instant message software may not be able to load friend lists, online video platforms cannot obtain playback resources, and even the mailbox client side cannot complete the account server verification, resulting in sending and receiving mail function failure.

3 Potential changes in equipment cyber security

if the user is active DNS closed and replaced by a secure DNS server, can improve cyber security to some extent, to avoid phishing attacks malicious domain name; but if the device automatically switches to the unknown DNS server after the passive DNS closed, but may increase the risk of hijacking, privacy theft, which is DNS closed need to pay attention to security risks.

How do different devices operate DNS shutdown?

for different end point devices, DNS off the operation path is different, but the core logic is to deactivate the current DNS server configuration, the following is a detailed introduction to the operation steps of mainstream devices.

1, Windows system DNS shutdown operation

first open the "Network and Sharing Center" in the control panel, click the network name of the current connection, select "Properties" in the pop-up window, find "Internet Protocol version 4 (TCP/IPv4) " and double-click, in the pop-up settings interface, the original check "Use the following DNS server address" to "Automatically obtain DNS server address", click OK to complete DNS shutdown, the device will no longer use the manually configured DNS server.

2, mobile terminal DNS shutdown operation

take the Android system as an example, open the "WLAN" option in the settings, find the currently connected WiFi and long press, select "Modify Network", tick "Show Advanced Options", change the IP setting to "Static", then delete DNS1 and DNS2 server address, save the settings to complete DNS shutdown; Apple iOS system is in the WiFi settings "Configure DNS", switch "manual" to "automatic", DNS can be closed.

3, the DNS shutdown operation on the router side

log in to the router management background, generally in the "Network Settings" or "DNS Settings" section, find the manually configured DNS server address option, switch it to "Automatically obtain the DNS provided by the ISP", after saving the settings, the entire local area network The device will be synchronized to complete the DNS shutdown and no longer use the manually configured DNS server on the router.

How to restore normal network after DNS shutdown?

If you need to restore normal network access after the DNS is closed

, or if there is an abnormal situation after the DNS is closed, you need to take corresponding recovery measures to re-establish a stable domain name resolution channel.

1, automatically obtain DNS server configuration

this is the easiest way to restore, after the completion of DNS off, directly set the DNS device to automatically obtain, the device will automatically request the available DNS server address to the network operator, after the completion of the configuration can restore the domain name resolution function, to meet the daily network access needs.

2 Manually configure high-quality public DNS servers

if the DNS server automatically obtained resolution speed is slow, poor stability, users can manually configure public DNS servers after DNS is closed, such as domestic 114.114.114.114, Ali's 223.5.5.5, etc. These public DNS servers have high stability and fast resolution speed, which can improve the smoothness of network access.

To sum up, DNS shutdown is an important operation involving network resolution configuration, which contains active and passive scenarios, and will also have a multi-dimensional impact on network access, service functions and cyber security. Different devices have different DNS shutdown operation paths. After completing DNS shutdown, the network can also be restored by automatic acquisition or manual configuration. Mastering the relevant knowledge of DNS shutdown can help users manage network settings more flexibly, troubleshoot and solve various network problems.