What should I do if my website is attacked by traffic? Teach you practical ways to stop losses quickly

at the moment of digital operation, the website is the core window for enterprises to acquire customers and display brands. Once it encounters abnormal traffic impact, it is light for users to access cards, and heavy for direct paralysis, which brings a fatal blow to business operation. Many operators are often at a loss in the face of emergencies, and do not know how to quickly investigate, stop losses, and even expand losses due to wrong operations. This article will focus on the response plan after the website is attacked by traffic, from rapid identification, emergency response to long-term protection, to provide you with a set of practical operation guidelines that can be landed to help you stabilize the situation in the crisis.

How to quickly identify the website by traffic attack?

want to effectively respond to the website traffic attack, the first step is to accurately identify the type and characteristics of the attack, to avoid the normal traffic fluctuations misjudged as an attack, but also to prevent the missed attack signal delay disposal timing.

1, through the server index troubleshooting abnormal

log in to the server background to view the core indicators. If the CPU and memory usage rate soar to more than 90% in a short period of time, and the bandwidth usage is close to the peak, and the real user visits to the website do not increase significantly, the probability is that the website has been attacked by traffic. In addition, the number of server connections has increased sharply, especially the repeated connections from a single or a few IPs, which are also typical attack characteristics.

2, with the help of log analysis attack traces

check the access log and error log of the website, if you find a lot of the same request path, the same user agent information, or there are a lot of 404, 502 and other error requests, and the source IP of the request is relatively centralized, you can also determine that the website is attacked by traffic. For example, common CC attacks will consume server resources by simulating a large number of real user requests.

How to stop the loss after the website is attacked by traffic?

confirm that the website is attacked by traffic, emergency response measures must be initiated immediately to reduce the impact of the attack in the shortest time, restore the basic access functions of the website, and reduce user churn and business losses.

1 Quickly block abnormal Internet Protocol Address

through the server firewall or CDN background, the abnormal source IP detected in the log will be banned in batches, especially those IPs that send a large number of requests in a short time. If the attack IP is more scattered, IP access frequency restrictions can be set, such as a single IP. If the number of requests per minute exceeds 50 times, it will be automatically intercepted, quickly cut off the entrance of the attack traffic, and relieve the pressure on the server.

2, enable CDN and high IP offload

If the website has configured CDN service, you can immediately switch to the high-defense CDN node, use its traffic cleaning function to filter abnormal traffic, and forward normal user requests to the source server. If CDN is not configured, high-defense IP can be temporarily enabled, domain name resolution to high-defense IP, and high-defense IP will undertake traffic cleaning work to avoid the source server being directly exposed to attacks. This is an efficient means to deal with traffic attacks on websites.

3 Temporary adjustment of server configuration

when the server resources are tight, the non-core functions of the website can be temporarily closed, such as the comment area, real-time statistics module, etc., to reduce the resource consumption of the server. At the same time, adjust the connection timeout time of the server, shorten the occupation time of the idle connection, and release more resources for processing normal user requests. Priority is given to ensuring the access fluency of the core page.

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

emergency stop loss can only solve the current crisis, to avoid the site traffic attacks occur again, we must build a long-term protection system, from the technical and management level to build a solid security line.

1, upgrade server and bandwidth configuration

upgrade the CPU and memory configuration of the server according to the business scale and traffic of the website, and at the same time expand the bandwidth to improve the anti-attack carrying capacity of the server. For high-frequency websites attacked by traffic, you can choose Cloud as a Service with DDoS protection capabilities. This kind of server comes with basic traffic cleaning function, which can effectively intercept common attack traffic.

2, deploy professional protection systems

build a professional web application firewall, identify and intercept SQL injection, XSS cross-site scripting, CC attacks and other malicious requests through rule engines, and set up intelligent protection strategies to automatically identify abnormal attacks and intercept them according to traffic characteristics. In addition, regularly update the protection rule base to ensure that new types of website traffic attacks can be dealt with.

3, optimize website code and architecture

optimize the website code, reduce redundant code and invalid requests, improve page loading speed and server resource utilization. Deploy the website with a distributed architecture, deploy static resources and dynamic content to different servers to disperse traffic pressure, even if a node encounters a website traffic attack, it will not affect the normal operation of the entire website.

To sum up, in the face of traffic attacks on websites, it is necessary to follow the progressive logic of identification, stop loss and protection. First, the attack is quickly locked through server indicators and logs, and then the emergency loss is stopped by banning IP and enabling high-defense services. Finally, the long-term protection system is built from three levels: server configuration, protection system and website architecture. Only by combining emergency response with long-term protection can the risk of traffic attacks on websites be effectively reduced, the stable operation of websites can be guaranteed, and the digital security barrier can be built for business development.