FFS Firewall is a lightweight, free, open source, application firewall written based on PHP, which can provide your website with the ability to resist DDOS attacks.
The processing core of FFS Firewall is less than 3KB, which puts minimal burden on the entire site system.
FFS Firewall has two layers of defense mechanisms:
One is proxy isolation, which can resist attack requests initiated by proxy servers (this is the case for most CC attacks). However, it should be noted that if your website uses a CDN acceleration service, please do not enable proxy isolation, otherwise the CDN Node synchronization requests will also be blocked.
The second is user behavior filtering, which mainly relies on sessions to filter visiting users. The filtering rules are set by the website administrator, so the defense strategy is flexible and changeable.
PS: Many people say that soft defense is useless. In fact, this is a very wrong view. Even today, DDOS attacks are still an old problem that cannot be completely solved. Whether it is a hardware firewall or a software firewall, it can only reduce the impact of DDOS attacks on services. FFS Firewall may not be able to solve large-scale DDOS
attack, but it can still effectively reduce the impact of DDOS attacks on the site. This firewall was developed because my site was under long-term attacks by a certain person, which had a huge impact on site services. FFS Firewall has been the first to be used on my site. Within one day of being online, it intercepted 10,000 attacks.
This shows that it still plays some role.
PS2: In fact, this thing also has the function of combating malicious users. From a certain point of view, it is also an attack for an annoying person to keep refreshing the website page.
By setting filtering rules to identify malicious users and lock them in a dark room, you can ensure stable services for other normal users.
FFS Firewall is developed by FFS-Dev and is permanently free and open source. You are also welcome to improve this small program.
Please be sure to read the Instructions for Use and Agreement before using this program.
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