What should I do if DNS is hijacked? A detailed explanation of common causes and handling methods

in the daily process of surfing the Internet, many users will encounter the correct URL but jump to unfamiliar pages, common websites load abnormally or even pop up malicious advertisements, which is likely to encounter DNS hijacking. This network problem will not only affect the Internet experience, but also may bring the risk of information leakage and property damage. This article will deeply dismantle the common incentives for DNS hijacking, share practical detection and solution methods, help users quickly troubleshoot and solve such network failures, and regain a safe and stable Internet environment.

How to determine whether the DNS has been hijacked?

want to solve the problem of DNS being hijacked, first of all, we must accurately determine whether we have really encountered such failures, so as to avoid misjudgment and lead to useless work.

1, page jump abnormal

enter the official URL of the regular website, did not enter the familiar page, but jumped to the unfamiliar website containing a lot of advertising, false promotional information, and even phishing fraud page, which is one of the most typical manifestations of DNS hijacking. For example, enter the official website of the bank, but jump to the counterfeit phishing website, this kind of situation needs to be highly vigilant.

2, abnormal website loading

commonly used stable websites suddenly appear slow loading, disordered page layout, or directly show that they cannot be accessed, but they can be opened normally after replacing other networks. This differentiated performance may also be caused by DNS hijacking. In addition, the device frequently pops up malicious advertisements that are not related to the current browsing content, which may also be related to DNS hijacking.

What are the common causes of DNS hijacking?

find the root cause of DNS hijacking, in order to prevent such problems from happening again from the source, the following are some of the most common triggers.

1, Public WiFi security bugs

shopping malls, cafes and other places are not encrypted or have low encryption levels. Hackers can easily use these security bugs to tamper with the DNS server address, resulting in DNS hijacking for users connected to the network. The management of such public networks is often loose and becomes a high-frequency scene for hackers to carry out attacks.

2, the router configuration has been tampered with

router is the core device of the home network, if the login password of the router is too simple, or the firmware has not been updated for a long time, hackers may remotely invade the router, modify the DNS server configuration, and then cause DNS to be hijacked. In addition, some old routers themselves have security bugs, which will also increase the risk of being attacked.

3, malicious software tampering settings

users accidentally download and install software, plug-ins carrying malicious programs, or click on phishing links, these malicious software will quietly tamper with the DNS settings of the device, thereby achieving DNS hijacking. Such malicious programs are usually hidden in seemingly formal software installation packages, and users will be caught if they don't pay attention.

How to deal with DNS hijacking?

confirmed that DNS was hijacked, it can be repaired by the following targeted methods to quickly restore the normal network state.

1, manually modify the DNS server address

first switch the current DNS server address of the device to a public and trusted DNS address, such as domestic 114.114.114.114, Ali's 223.5.5.5, or foreign 8.8.8.8. Taking the Windows system as an example, you can find the Internet Protocol version 4 in the network connection properties, manually enter the new DNS address, save it and restart the network. In most cases, the DNS hijacking problem can be quickly solved.

2, reset the router configuration

If the DNS is hijacked due to the tampering of the router configuration, you can find the reset button on the router, press and hold for 5-10 seconds until the indicator light flashes, and restore the router to factory settings. Then reset the router's login password, WiFi password, and manually configure the trusted DNS server address to avoid being attacked again.

3, kill device malicious software

use the regular antivirus software on the device for a comprehensive scan to kill possible malicious software and plug-ins. After the scan is completed, follow the prompts to clean up the dangerous program, and then check again whether the DNS settings of the device are back to normal. If the antivirus software cannot be completely cleaned, you can consider backing up important data and reinstalling the system to solve the problem of DNS hijacking from the root cause.

How to prevent DNS hijacking from happening again?

solve the problem of DNS being hijacked, take preventive measures to avoid encountering such network failures again and ensure long-term Internet security.

1, strengthen network equipment security

regularly modify the login password and WiFi password of the router, avoid using simple passwords such as birthdays and mobile phone numbers that are easy to crack, and try to use complex passwords that combine letters, numbers and symbols. At the same time, timely update the firmware version of the router to fix known security bugs and reduce the risk of DNS hijacking caused by hackers.

2, carefully download and install software

download the software from official channels, avoid clicking the download link of unfamiliar websites and the download button in pop-up advertisements. When installing the software, carefully check the installation options at each step, uncheck the bundled irrelevant plug-ins and software, and prevent malicious programs from quietly invading the device and tampering with DNS settings to cause DNS to be hijacked.

3 Preference to Encrypted Networks

choose encrypted private WiFi or mobile phone traffic for daily Internet access, and avoid connecting to public WiFi without password and encryption. If you must use a public network, do not perform sensitive operations such as online payment and login to bank accounts in this network environment to reduce the risk of information leakage caused by DNS hijacking.

sum up, DNS hijacking is a common network failure, which will pose a threat to the Internet experience and information security. It can be quickly judged whether DNS has been hijacked through abnormal web page jumps and abnormal website loading. The incentives cover public network vulnerabilities, router configuration tampering, malicious software intrusion and many other aspects. Users can solve the problem by modifying DNS addresses, resetting routers, and killing malicious software. At the same time, preventive measures such as device security protection and careful download of software can effectively avoid the risk of DNS hijacking and ensure Internet security.