What should I do if DNS is hijacked by the operator? Full analysis of the reasons and processing methods

in the daily process of surfing the Internet, many users have encountered situations where they open regular websites but jump to unfamiliar advertising pages and search results are forcibly tampered with, which is likely to encounter DNS hijacking by operators. This network problem will not only interfere with the normal Internet experience, but also may bring risks such as information leakage and malicious software implantation. This article will comprehensively analyze the reasons behind DNS hijacking by operators, as well as corresponding investigations and solutions to help users quickly get rid of network troubles and ensure Internet security.

What are the typical manifestations of DNS hijacking by operators?

to solve the problem of DNS being hijacked by operators, it is first necessary to accurately identify its performance characteristics and avoid confusion with ordinary network failures.

1, page jump abnormal

enter the domain name of the regular website, do not enter the expected page, but jump to the unfamiliar website full of advertisements, or display content completely unrelated to the original website, this jump is not caused by user error, and multiple refreshes still can not return to normal, is a typical performance of DNS hijacked by operators.

2, search results were tampered with

use search engines to find information, the top results are not official or authoritative content, but a large number of irrelevant advertisements or malicious promotion links, even if the search keywords are changed, this abnormal situation still exists, indicating that DNS resolution results have been maliciously intervened.

3, pop-up ads frequently appear

without opening any advertising websites, the browser frequently pops up a variety of vulgar, inducing advertisements, and even in the lower right corner of the desktop will automatically pop up the promotion window, which reappears soon after closing, which is also a common signal that DNS is hijacked by operators.

What is the core incentive for DNS to be hijacked by operators?

understand the reasons why DNS is hijacked by operators, it can help users avoid such problems from the root cause and reduce the probability of being hijacked again.

1, commercial interests driven

some operators in order to obtain additional advertising revenue, they will hijack the DNS resolution process through technical means, and direct the user's normal web page request to the cooperative ad platform to earn traffic share. This DNS hijacking behavior by operators mostly occurs in the network of small and medium-sized operators, which is an illegal means of profit.

2, network system vulnerabilities

the operating system of the user equipment, the router firmware security bugs are not repaired, or the router login password settings are too simple, easy to be exploited by hackers, by controlling the router to tamper with DNS settings, and then achieve the effect of DNS hijacked by operators, such cases and more The user's own network protection is not in place.

3, malicious software secretly manipulate

users accidentally download and install software bundled with malicious programs, these malicious software will modify the DNS configuration of the device in the background, forcibly replace the DNS server address with a malicious address, thereby triggering the phenomenon of DNS being hijacked by operators, and may also steal the user's Internet data.

three, DNS was hijacked by operators of emergency treatment?

once it is confirmed that the DNS is hijacked by the operator, the user can quickly check and solve the following methods to restore the normal network environment.

1 Switching public DNS servers

give up using the operator's default DNS server and replace it with domestic or international well-known public DNS, such as domestic 114.114.114.114 and international 8.8.8.8. These public DNS servers have higher stability and security and can effectively avoid the risk of DNS being hijacked by operators. Users can modify the DNS address in the computer network settings or router management background.

2, reset the router and change the password

if the DNS settings of the router are tampered with DNS hijacked by operators, users can find the reset button on the router, press and hold for about 5 seconds to restore the factory settings, and then reset the wireless network name and login password.

3, kill device malicious software

use regular antivirus software to comprehensively scan the computer or mobile phone, clean up the hidden malicious software and advertising plug-ins, and then check whether the DNS settings of the device have been modified. If it has been tampered with, manually restore it to the default or public DNS address, and solve the problem of DNS being hijacked by operators from the source.

How to prevent DNS hijacking by operators from happening again?

solve the current problem of DNS being hijacked by operators, it is also necessary to do a good job of long-term protection to avoid such problems from recurring.

1, regularly update the system and firmware

timely update the operating system of the computer, mobile phone, and the firmware version of the router, fix known security bugs, do not leave an opportunity for hackers, and reduce the possibility of DNS being hijacked by operators from the device level.

2, open DNSSEC security verification

part of the public DNS server supports DNSSEC security verification function, after opening the function, the device will check the legitimacy of the DNS resolution result, once the resolution result is found to be tampered with, will refuse to use the result, effectively prevent the risk of DNS hijacking by operators.

3, choose a regular network service provider

try to choose a good reputation, large-scale regular network operators, such operators of the network management is more standardized, the probability of DNS hijacking operators is lower, while encountering network problems, can provide more timely and effective technical support.

To sum up, DNS hijacked by operators is a common cyber security problem, its performance is diverse, complex incentives, users need to identify abnormal performance, troubleshooting the reasons behind, to switch public DNS, reset routers and other methods to solve the problem, while doing a good job of system updates, open security verification and other protective measures, in order to effectively avoid the risk of DNS hijacked by operators, to protect the security and fluency of the Internet.