Website servers often face various attacks during operation, and network attacks may bring incalculable losses to others. Therefore, the security of website servers is also the top concern of webmasters. How to determine whether a website server has been attacked? We can use some signals to predict the attack in advance. The attack signals on website servers are summarized as follows:

1、 Unknown access

Some attackers may invade and launch attacks internally, possibly penetrating multiple security layers to access the underlying host. When the backend of the enterprise host detects multiple unknown access behaviors, and these unauthorized IP addresses frequently access the enterprise server, it is also an abnormal behavior.

2、 Write to disk

The frequent occurrence of abnormal disk write operations is likely due to the attacker's symptom of attempting to write a large amount of data to the server's disk, with the aim of causing server resources to be occupied and causing the server to crash. When such a situation occurs on the enterprise server, immediate review is required.

3、 Network latency

When a network attack occurs, the attacker's attack can cause the server and network resources to be occupied, resulting in network latency due to server and network overload. When the enterprise website server experiences multiple severe network delays in a day, it is likely that a network attack has occurred.

4、 Abnormal memory and processor usage

When a malicious attack invades a host, multiple malicious software will inexplicably appear in the host, causing a large amount of server memory and processor utilization to be occupied. If a company discovers an abnormal increase in its memory and processing usage in daily use, it needs to verify whether there are any malicious software attacks.

5、 Abnormal system logs

Network attacks may cause abnormal information to appear on the server daily. When the IP address has an abnormal number of login attempts, host crashes, or system logs within a day, users need to investigate the server one by one to confirm if the server is under attack.

6、 Network monitoring and inspection

Network attacks can be detected through network detection, such as professional network traffic analysis tools commonly used by users, which facilitate the detection of abnormal traffic when network attacks occur. Many companies also inspect the security policies of their internal networks and ensure network security through network isolation.

7、 Network logs

The network log of the host can understand the attack mode and attack time. The network log can analyze software and apply fine-tuning filtering rules to ensure that more valuable attack information is detected. Regular backups can be used to quickly recover host data and improve the stability of host services.

8、 Network architecture

By detecting the network architecture of the host, it can also be seen whether there is an attack, mainly checking the host interface, database, application server, etc. If there are vulnerabilities in the host, it is necessary to update and fix them in a timely manner, otherwise attackers may easily discover this vulnerability and use it to launch attacks. Before installing the host, users need to conduct a security assessment of the host and take appropriate security measures.

The security of the host is a long-term maintenance goal for webmasters, and a safe running host can ensure the production and operation of the enterprise. Enterprises can identify the existence of attacks through network architecture detection, log detection, network detection, and other methods, and take timely measures to maintain host security. Regularly conducting security assessments on hosts can improve the stability and reliability of network security conditions.