OctopusWAF is an open-source Web application firewall entirely created in C language that uses libevent to make multiple connections. The event-driven architecture is optimized for many parallel connections (keep-alive), vital for high-performance AJAX applications. This tool is very light. You can deploy in any, please. This resource turns perfect for protecting specific endpoints that need custom protection.
HiddenWall is a Linux kernel module generator for custom rules with netfilter. (block ports, Hidden mode, firewall functions, etc.). The motivation: in a bad situation, an attacker can put your iptables/ufw to fall. But if you have HiddenWall, the attacker will not find the hidden kernel module that blocks external access because it has a hook to netfilter on kernel land(think like a second layer for Firewall).
Casper-fs is a Custom Hidden Linux Kernel Module generator. Each module works in the file system to protect and hide secret files. This program has two principal functions: turning private files hidden. The second function is to protect confidential files to prevent reading, writing and removal.
