How to deal with operator DNS hijacking? Steps and precautions

in the process of daily Internet access, many users will encounter clearly enter the correct URL, but jump to unfamiliar advertising pages, phishing websites, or common website loading abnormality, which is likely to encounter the operator DNS hijacking. This situation will not only affect the Internet experience, but also may bring information leakage, property damage and other risks. This article will explain in detail the operator DNS hijacked judgment method, repair steps, protection programs and related matters needing attention to help you quickly solve the problem and ensure Internet security.

, how to judge the operator DNS hijacked?

want to solve the problem of operator DNS hijacking, we must first accurately determine whether we have really encountered such anomalies and avoid misjudging other network problems.

1, URL jump abnormal

under normal circumstances, enter the official URL will directly enter the homepage of the corresponding website, but if the operator's DNS is hijacked, enter the URL will jump to the page unrelated to the target website, most of which are full of advertising promotion pages, or counterfeit phishing sites, this kind of jump is not active by the user, and multiple refreshes cannot return to normal.

2, abnormal website loading

commonly used regular websites suddenly appear slow loading, disordered page layout, or prompt "inaccessible", but can be opened normally after replacing other networks. This situation may also be caused by the hijacking of the operator's DNS. In addition, some users will also encounter the same network, some devices can surf the Internet normally, and some devices have abnormal situations, which also meet the characteristics of DNS hijacking.

3, DNS resolution detection abnormal

users can check whether the resolved Internet Protocol Address is consistent with the official announcement through professional DNS detection tools, or enter the "nslookup target URL" command in the computer command prompt. If the resolved Internet Protocol Address is unfamiliar and does not match the official IP, it can be basically determined that the operator DNS is hijacked.

two, the operator DNS hijacked emergency repair steps

once confirmed that the operator's DNS was hijacked, emergency repair measures need to be taken immediately to avoid further losses and restore normal Internet access.

1, modify the local DNS server address

this is the most direct way to solve the hijacking of operator DNS. Users can replace the default operator DNS server address of the device with a public DNS server address. Common public DNS include Alibaba Cloud public DNS, Tencent public DNS, Google public DNS, etc. These public DNS are more secure and not easy to be hijacked. When modifying, just enter the network settings interface of the device, find the DNS server settings option, and enter the corresponding public DNS address.

2, clean the device malware

some operators DNS hijacked because the device installed with malicious plug-in software, such software will tamper with the local DNS settings, resulting in abnormal resolution. Users can use the security software that comes with the device to conduct a comprehensive killing of the system and clean up malicious programs and plug-ins. After the killing is completed, restart the device and re-check the DNS settings to confirm whether it is back to normal.

Long-term protection plan for operator DNS hijacking

solve the current operator DNS hijacking problem, it is necessary to do a good job of long-term protection to avoid encountering similar network abnormalities again and ensure the security and stability of the Internet environment.

1, fixed use of public DNS servers

compared with the operator's default DNS server, the security and stability of the public DNS server are more guaranteed, and most of them provide anti-hijacking and anti-phishing functions. Users can set the public DNS server address uniformly in all Internet devices to avoid the problem of the operator's DNS being hijacked again due to switching devices or networks. At the same time, it is necessary to regularly confirm whether the DNS settings have been tampered with, and adjust them in a timely manner if any abnormalities are found.

2, turn on the equipment safety protection function

computer, mobile phone and other Internet equipment security protection function to keep open, timely update the virus database and system patches, to avoid malicious programs through system vulnerabilities intrusion device, tamper with DNS settings. In addition, try to download software from official channels, avoid the installation of unknown software, reduce the risk of malicious plug-in implantation, reduce the possibility of hijacking the operator DNS from the source.

4. Precautions for handling operator DNS hijacking

in the process of dealing with operator DNS hijacking, there are some details that need to be paid attention to to to avoid aggravating the problem due to improper operation, or bringing new security risks.

1, avoid clicking on unfamiliar page

encounter operators DNS hijacked, jump to unfamiliar pages with malicious links or phishing traps, once clicked may download malicious programs, or disclose personal account, password and other sensitive information. Therefore, no matter how attractive the page content, do not click any link or button, directly close the page and repair operations.

2, timely feedback to the operator

If it is confirmed that the hijacking is caused by a problem with the operator's own DNS server, it is necessary to contact the operator's customer service in time to report the abnormal situation, provide detailed abnormal performance and detection results, and urge the operator to investigate and repair the server problem. At the same time, keep the relevant abnormal screenshots as credentials to facilitate follow-up processing progress.

To sum up, operator DNS hijacking is a common network abnormality problem, users can quickly judge abnormal performance such as URL jump and website loading, and repair it in time by modifying DNS servers and cleaning up malicious programs. At the same time, long-term protection and attention to operation details can effectively solve and avoid such problems.