What should I do about DNS malicious hijacking? Solutions to common problems

in daily network use, many users have encountered the situation of opening familiar websites but jumping to unfamiliar advertising pages, search results being tampered with or even unable to access regular sites, which is likely to encounter DNS malicious hijacking. It will not only interfere with the normal Internet experience, but also may bring risks such as phishing fraud and privacy leakage. This article will dismantle the DNS malicious hijacking response plan from multiple dimensions such as identification, repair and protection, and help you quickly retrieve a safe and stable network environment.

How to identify whether DNS malicious hijacking?

DNS malicious hijacking in various forms, easy to be confused with ordinary network failures, first learn to accurately identify in order to solve the problem.

1, website jump abnormal

enter the domain name of a regular website, jump to the advertising page, phishing site or counterfeit platform unrelated to the original website, and refresh and replace the browser many times.

2, search results were tampered with

use the search engine to query information, the home page results are all irrelevant advertisements, or click on the search results to jump to unfamiliar sites, rather than the expected regular links, this kind of directional tampering is also a typical feature of DNS malicious hijacking.

Second, the emergency repair program of DNS malicious hijacking

confirmed DNS malicious hijacking, immediate measures need to be taken to restore normal network access and avoid further security risks.

1 Switching public DNS servers

switch the default DNS server of the device to the domestic mainstream public DNS, such as 114.114.114.114, 223.5.5.5, etc. This kind of public DNS has strict security protection mechanism, which can effectively avoid the risk of being maliciously hijacked by DNS. Most devices can be modified in the network settings.

2, refresh the local DNS cache

some DNS malicious hijacking will tamper with the DNS cache data of the local device, resulting in abnormal resolution results. Windows users can execute the ipconfig /flushdns command from the command prompt, and Mac users can execute the sudo dscacheutil -flushcache command at the end point to complete the local cache cleanup and refresh.

What are the long-term protection strategies for DNS malicious hijacking?

emergency repair can only solve the current problem, and establish a long-term protection mechanism to avoid repeated DNS malicious hijacking and ensure the safety of network use.

1 Enable DNS over HTTPS encryption

DNS over HTTPS (DoH) transmits DNS resolution requests and results through encryption, which can effectively prevent third parties from tampering with the resolution data and avoid DNS malicious hijacking. At present, mainstream browsers and some routers support enabling this function, which can greatly improve the security of domain name resolution.

2, regularly update the equipment system and software

many DNS malicious hijacking is the use of equipment system or software vulnerabilities to launch attacks, regularly update the computer, mobile phone, router system firmware and software versions, timely repair security bugs, can reduce the probability of DNS malicious hijacking from the source.

four, DNS malicious hijacking investigation and traceability skills

if DNS malicious hijacking occurs repeatedly, it is necessary to investigate the root cause of the problem and prevent such situations from happening again from the source.

1, check the router settings

part of DNS malicious hijacking is achieved by tampering with the DNS settings of the router, log in to the router management background, check whether the DNS server address is modified to an unfamiliar address, if there is an abnormality, restore the default settings and modify the router login password in time to avoid being invaded again.

2, scanning device malicious software

computer or mobile phone, it may also tamper with the local DNS settings to cause DNS malicious hijacking. Use regular antivirus software to fully scan the device, clean up the malicious program and then check whether the DNS settings are back to normal.

To sum up, DNS malicious hijacking is a common cyber security problem, from accurate identification of abnormal performance, to emergency repair and recovery of the network, and then to the establishment of long-term protection mechanism, each link is indispensable. Daily Internet access should pay attention to network anomalies, calm response when encountering DNS malicious hijacking, by switching public DNS, cleaning cache and other ways to quickly solve, while opening encryption and resolution, regular update system, can effectively protect the security and stability of network use.