Any reason to do this instead of using iptables (which is what people usually use in the linux space for this for over a decade).
Example: https://www.digitalocean.com/community/tutorials/how-to-conf...
Example: https://www.digitalocean.com/community/tutorials/how-to-conf...
This project reminds me a bit of moxie's knockknock[1], where the idea of port knocking is kept intact, but with some added security. Plus, it seems really easy to setup, compared to writing dozens of iptables rules.