This is a simple network firewall for pwn challenges of ctf awd competition, light and simple code.There is no dependence, the log format is clear with the hexadecimal payload string and original string, which is more convenient to exp script. 【ctf awd比赛中的针对于pwn题的waf，拥有抓取、通防、转发、多人转发模式，推荐使用转发模式】