Why do we need to deploy a Web application firewall? (1)

Why do we need to deploy a Web application firewall? (1)

Large Web applications are vulnerable to multiple attacks, such as SQL injection and cross-site scripting, this can lead to downtime, low efficiency, data theft, fines in violation, brand damage, service interruption, and customer dissatisfaction. To protect Web applications, we recommend that you use waf.

Web Application Firewall runs at the application layer and can dynamically learn and adapt to protection. It can be integrated with other security technologies. The following describes the comparison and implementation suggestions for different solutions.

Issues to consider

Enterprises can deploy the application delivery controller (ADC) components, cloud services, and Web application firewall as an independent device on a Web server or on its front-end, provides fine-grained protection for special Web applications. Its functions include combining known attacks with enhanced legitimate communication and other security modes to defend against Web attacks and reduce false intelligence (that is, seemingly false intelligence ).

In general, Web applications are the targets that attackers think are most worthy of "Starting" attacks. Because these software has sufficient vulnerabilities, it is the easiest way to enter the Enterprise.

Although a typical network firewall is located on the periphery of the network, intrusion prevention systems (IPS) usually do not understand the Web application protocol logic, so they cannot fully identify the application layer (Layer 7 of OSI) whether the request is normal.

The Web application firewall can defend against attacks that IPS cannot defend against. It can search for Web vulnerabilities and attacks based on a set of complete features, and detect malicious file uploads.

In addition to enhanced access control policies from Layer 4 to Layer 7 to prevent attackers from accessing data without proper authorization, WAF should also provide external data leakage checks (for example, illegal file downloads), filtering sensitive information (such as credit card numbers), and combining with other security standards (such as pci dss), this helps defend against DDoS attacks at the application layer.

The benefits enterprises expect from Web application firewall depend on a variety of factors, including how to configure, adjust, and maintain them. Enterprises cannot think that the Web application firewall is all right after it is correctly configured. Instead, they must maintain and adjust the Communication Behavior of the application and the network.

After necessary policies and features are enabled, WAF provides the most precise Web application defense. At this point, it is better than the intrusion defense system.

Web Application Firewall deployment can reduce the frequency of Enterprise vulnerability scanning. In addition, WAF can be integrated with vulnerability scanners, DDoS protection devices, and other technologies, and virtual patches can be applied to vulnerable Web applications.