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

in the process of Internet access, many users or website operators have encountered such a situation: after entering a familiar domain name, they jump to unfamiliar advertising pages, phishing websites, or directly display that they cannot be accessed, which is likely to encounter DNS hijacking. This type of network attack will tamper with domain name resolution records, which not only affects the normal access experience, but also may bring risks such as information leakage and property damage. This article will identify, solve, prevent and other dimensions to dismantle the response plan of domain name DNS hijacking, help you quickly restore normal access and establish a long-term protection mechanism.

, how to judge the domain name DNS hijacking?

to solve the problem of domain name DNS hijacking, we must first accurately determine whether we have really suffered this type of attack, to avoid confusion with ordinary network failures.

1, access results are abnormal

enter the domain name normally, jump to the original website completely unrelated pages, such as advertising pages, phishing sites, or page display garbled, loading failure, and replace different devices access the same network results, the probability is caused by DNS hijacking domain name.

2, analysis record comparison abnormal

through the command prompt that comes with the computer, use the nslookup or dig command to query the resolution IP of the domain name, and then compare the official resolution records in the background of the domain name service provider.

2. Emergency solutions for domain name DNS hijacking?

once confirmed that the domain name DNS hijacking, you need to take emergency measures to restore normal access, reduce the impact on work or business.

1 Replacing public DNS servers

most home or office networks default to DNS servers provided by operators, such servers are easy to become the target of domain name DNS hijacking. You can manually replace the DNS server with public DNS, such as domestic 114.114.114.114, foreign 8.8.8.8, and then re-visit the domain name, usually quickly restore normal resolution.

2, clear the local DNS cache

the local device will cache the resolution records of the visited domain name, and the domain name DNS hijacking may tamper with these cache contents. Enter the ipconfig /flushdns command through the command prompt to clear the local DNS cache and re-resolve the domain name, which can temporarily bypass the tampered cache records and restore normal access.

3. Long-term prevention plan for domain name DNS hijacking?

emergency solution is only a stopgap measure, to avoid the root cause of DNS hijacking again, but also to establish a long-term preventive mechanism.

1 Enable DNSSEC Security Extensions

DNSSEC is a domain name system security extension protocol, which can add digital signatures to domain name resolution records to prevent tampering during the resolution process. After the DNSSEC function is turned on in the background of the domain name service provider, even if an attacker tries to tamper with the resolution records, the device can find abnormalities through signature verification, effectively resisting domain name DNS hijacking.

2, use encrypted DNS protocol

traditional DNS protocol transmits resolution requests in clear text, it is easy to be intercepted and tampered with, while encrypted DNS protocols such as DoH and DoT can encrypt the transmission of resolution requests and responses, so that attackers cannot steal or tamper with the resolution data, and reduce the probability of domain name DNS hijacking from the transmission level. At present, mainstream browsers and operating systems support the configuration of encrypted DNS protocols.

4. How to trace the responsibility of domain name DNS hijacking?

if the domain name DNS hijacking has caused serious losses, such as user information leakage and website revenue damage, it is necessary to trace the relevant responsible parties and safeguard their legitimate rights and interests.

1, check the network service provider responsibility

if multiple devices under the same network are subject to domain name DNS hijacking, there is a high probability that the DNS server of the network service provider has been tampered with, you can contact the operator's customer service to feedback the problem, ask it to troubleshoot server vulnerabilities and restore normal analysis, if the loss can be negotiated compensation.

2, lock malicious attacker responsibility

if it is targeted domain name DNS hijacking for a single website, it may be a malicious attack by competitors or hackers, the source of the attack can be investigated through the resolution log of the domain name service provider and the server access log, and the relevant evidence can be collected and reported to the public security organ.

To sum up, domain name DNS hijacking is a common cyber security problem. From accurate judgment to emergency resolution, to long-term prevention and responsibility traceability, each link has a corresponding operation plan. It is necessary to develop the habit of regularly checking domain name resolution records, turn on security protection functions in a timely manner, and respond quickly when encountering abnormal situations in order to effectively avoid the risks caused by domain name DNS hijacking and ensure the security and stability of network access.