What should I do if my website is attacked by DOS? Detailed explanation of quick self-help and protection methods

for webmasters and enterprises that operate websites, the stable operation of websites is the basis for user retention and business development, and DOS attacks are one of the most common cyber security threats. Once this type of attack occurs, the website will load slowly, cannot be accessed or even the server crashes, which will not only lose a lot of user traffic, but also may affect brand reputation. This article will dismantle the response plan after the website is attacked by DOS from multiple dimensions such as emergency self-rescue, attack identification, and long-term protection, and help you quickly restore the operation of the website and establish a security barrier.

How to save yourself after the website is attacked by DOS?

when a website visit is found abnormal, first confirm whether it has been attacked, and then immediately start the emergency self-rescue process to shorten the time of website failure as much as possible.

1, quickly confirm the type and scope of the attack

first view the data through the traffic monitoring tool in the background of the server, such as CPU usage, memory usage, peak request volume, etc. If the request volume skyrockets several times in a short period of time, and the request source IP is concentrated or repeated, it can basically determine that the website is attacked by DOS. At the same time, it is necessary to confirm whether the attack is aimed at a single page or the entire server, and check whether other related businesses are affected.

2. Implement emergency stop-loss operations

first contact the server service provider to inform its website of the DOS attack, request to open the temporary traffic cleaning service, filter abnormal requests. Then add rules in the server firewall to ban abnormal IP segments, while suspending non-core business services, concentrate server resources on the core page, and give priority to basic access functions.

What are the common characteristics of DOS attacks on websites?

identify the characteristics of the website being attacked by DOS in advance, it can help you intervene in the early stage of the attack to avoid the expansion of the attack range and cause greater losses.

1 Abnormal fluctuations in access data

under normal circumstances, the traffic of the website is relatively stable, if there is a sudden surge in the amount of requests without warning, especially repeated requests from the same region or the same IP, or the bandwidth occupancy of the server reaches a peak in an instant, these are typical signals of the website being attacked by DOS, which need to be investigated immediately.

2, the website visit experience has dropped significantly

user feedback website loading is slow, and even multiple refreshes can not be opened, the background management page also appears card or timeout, the server response time more than 3 times the normal range, these intuitive access experience changes, but also the site is the obvious characteristics of DOS attack, can not be simply attributed to server failure.

How to protect the website for a long time after being attacked by DOS?

emergency self-help can only solve the current problem, to avoid losses again, we must establish a long-term protection system, from the technical and management level of double reinforcement.

1, upgrade server and network architecture

choose a server with high anti-attribute, or configure CDN acceleration service, with the help of CDN nodes to disperse traffic and avoid attacks directly concentrated on the source server. At the same time optimize the website architecture, adopt distributed deployment, separate static resources and dynamic content, improve the anti-attack carrying capacity of the website, and reduce the risk of the website being attacked by DOS.

2, improve the daily safety monitoring mechanism

set up a real-time traffic monitoring system, set the abnormal traffic alarm threshold, and issue an alarm immediately when the request volume, IP source and other data exceed the threshold. Regularly analyze the server logs to troubleshoot potential security risks, and arrange special personnel to regularly rehearse the emergency response process to ensure that the website can be dealt with quickly and efficiently when it is attacked by DOS.

4. How to repair user trust after the website is attacked by DOS?

website returns to normal, the impact of the user side cannot be ignored, and measures need to be taken to repair user trust and reduce indirect losses caused by attacks.

1, timely release of official announcements

issue announcements on the homepage of the website, official account and other channels, explaining the situation of the website being attacked by DOS, informing users that the website has returned to normal, and apologizing for the inconvenience caused to users during the attack. The content of the announcement should be concise and clear to avoid panic or misunderstanding among users.

2, the introduction of user care measures

for e-commerce websites, you can issue small coupons or points to users; for content websites, you can launch exclusive paid content free experience activities. Through these small benefits, make up for the loss of users during the attack, regain the trust and support of users, and reduce the user churn rate.

to sum up, although the website was attacked by DOS is menacing, as long as you master the correct response methods, you can minimize the loss. First, you must quickly identify the characteristics of the attack, start the emergency self-rescue process, and stop the loss with the help of the service provider's traffic cleaning and firewall rules; secondly, you must establish a long-term protection system, upgrade the server architecture and monitoring mechanism; finally, you must pay attention to the repair of user trust. Through this series of operations, you can not only quickly restore the operation of the website, but also comprehensively improve the security level of the website and escort the stable development of the business.