The WEB application firewall, or WAF, is the best method for WEB security protection.
So how does WAF protect web security? What is the protection principle?
The reason why WAF protects websites
The principle of WAF protecting websites is actually very simple:
Before the website is protected against WAF, visitors directly access the website.
After accessing the WAF, the WAF will be located between the visitor and the website. The visitor first visits the WAF. The WAF will first check whether the access data contains malicious content. If not, the access is allowed and the access is allowed to the web, otherwise it is intercepted by the WAF.
Just like riding a fire or an airplane, it must first go through security inspections. WAF plays the role of security inspection .
WAF protection type
Just as there are various ways of security inspection, some only need to pass through the security gate, no need to stay, and some need to stop and go through manual security.
The detection method of WAF is also the same. There is a reverse proxy mode, similar to manual security inspection; there is a transparent proxy mode, similar to security gate.
WAF protection strength
Different WAFs have different protection strengths.
It's like a security gate, just a machine scan, and if it's an aircraft security check, you need to take out your mobile phone and belt for inspection.
Traditional WAF is similar to security gates, which check conventional SQL injection, XSS, file upload, etc.
The new generation of WAF is like an aircraft boarding security check, with a higher detection level. In addition to the protection of traditional WAF, there are more detection functions, such as the recently popular WAF: ShareWAF , with big data detection, JS obfuscation, and web source code encryption Functions and so on, the natural protection function is stronger, can detect more threats.
WAF protection form
Different levels of security requirements, you can use different levels of WAF products, large websites, need large protection, small websites, small protection.
WAF has different product forms , including hardware, software, and cloud WAF .
Large-scale websites and websites with high security requirements generally use hardware WAF or software.
Medium-sized websites, generally used software;
Small websites, generally use cloud WAF;
to sum up
WAF, Web application firewall, is the protection program of the website, protects the website security, and prevents various networks ***.
Web protection capabilities are strong and weak, the scope of protection is large and small, the price is high and low, different websites use different WAF protection.