What should I do if my domain name is attacked? A summary of common problems and solutions

in the increasingly competitive environment of Internet traffic, domain names, as the core identity of websites, once attacked, will not only lead to normal access to the website, but also may lead to user data leakage, brand reputation damage and other chain problems. Many operators are often at a loss due to lack of experience when facing domain name attacks for the first time. This article will comprehensively sort out common problems and solutions from the identification of domain name attacks, emergency treatment, root causes to long-term protection, and provide website operators with practical guidance that can be landed.

, how to determine the domain name attack?

the initial symptoms of domain name attack is easy to be confused with server failure and network fluctuation, accurate identification is the key to follow-up processing.

1, abnormal website access

if a large area of the website suddenly inaccessible, loading speed plummeted, or some areas of the user feedback can not open the page, excluding server bandwidth shortage, program bugs and other conventional problems, we must be alert to the possibility of domain name attack. For example, when encountering DNS hijacking, the user enters the domain name will jump to an unfamiliar website, which is a typical manifestation of domain name attack.

2, domain name resolution exception

view the DNS records of the domain name through the domain name resolution query tool. If there is an unfamiliar Internet Protocol Address, the resolution records are tampered with, or the resolution status fluctuates frequently, it is most likely that the domain name is attacked. In addition, the domain name management platform has abnormal login, such as entering the correct password many times and still unable to log in. It may also be a signal that the attacker tries to tamper with the domain name information.

Second, how to urgently stop the loss after the domain name is attacked?

confirm that the domain name is attacked, emergency measures must be taken as soon as possible to minimize the loss caused by the attack.

1 Switch alternate DNS servers

if the domain name is attacked is caused by DNS hijacking or DDoS attack, you can immediately switch the domain name resolution to high-defense DNS servers, such as domestic Alibaba Cloud high-defense DNS, DNSPod, etc., such servers have traffic cleaning and attack interception capabilities, can quickly restore the normal resolution of the domain name, blocking the attacker's traffic intrusion.

2 Suspension of non-essential domain name services

temporarily close the domain name pan-resolution, sub-domain jump and other non-essential services to reduce attackers can use the entrance. At the same time, contact the customer service of the domain name registrar, apply to open the domain name protection mode, limit the permission to modify the domain name information, to prevent attackers from further tampering with the domain name registration information, resolution records.

How to check the root cause after the domain name is attacked?

emergency stop loss, we must deeply investigate the root cause of the domain name attack to avoid the recurrence of similar attacks.

1, check the domain name management authority

check the login log of the domain name registration account to see if there is a login record of the unfamiliar Internet Protocol Address. If there is an abnormal login, it means that the domain name management password may have been leaked, which is a common cause of domain name attacks. At the same time, check whether the associated mailbox of the domain name is invaded. Many attackers will obtain domain name management rights by cracking the mailbox password.

2, detect website program vulnerabilities

part of the domain name was attacked because of SQL injection, XSS cross-site scripting and other vulnerabilities in the website program. After the attacker obtains server permissions through the vulnerability, he further tampered with the domain name resolution record. You can use professional website security detection tools to comprehensively scan the website code, plug-ins and templates, repair the discovered vulnerabilities in time, and cut off the attacker's invasion path.

How to prevent the domain name from being attacked again?

domain name attack protection is a long-term project, the need to establish a multi-dimensional security defense system to reduce the risk of attack from the root.

1, strengthen the domain name account security

set complex domain name management passwords, regularly change passwords and avoid duplicate passwords with other platforms, and open the secondary verification function of the account, such as SMS verification and Google authentication. Even if the password is leaked, attackers cannot easily log in to the domain name management platform. In addition, regularly update the password of the domain name associated mailbox and open the abnormal login reminder of the mailbox.

2 Enable high-security DNS service

choose a high-defense DNS service provider with DDoS protection and DNS hijacking interception functions. Such service providers have distributed node clusters, which can effectively disperse attack traffic and monitor the status of domain name resolution in real time. Once an abnormality is found, the protection mechanism will be automatically triggered to reduce the success rate of domain name attacks. In addition, regularly back up domain name resolution records to avoid attacks that cannot be quickly restored after losing resolution records.

To sum up, the response to domain name attacks is from identification, stop loss to investigation and protection of the complete process, operators need to accurately judge the symptoms of attacks, the first time to take emergency measures to reduce losses, while in-depth investigation of the root cause of attacks, the establishment of long-term protection system.