https://www.pistack.xyz/tags/fwknop/ Recent content in Fwknop on Pi Stack Hugo en-us Sun, 10 May 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-05-10-self-hosted-port-knocking-spa-fwknop-knockd-guide/ Sun, 10 May 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-05-10-self-hosted-port-knocking-spa-fwknop-knockd-guide/ <p>Port knocking and Single Packet Authorization (SPA) are network security techniques that hide services behind a firewall until a specific sequence of connection attempts or a cryptographic packet reveals them. While cloud providers offer managed security groups, self-hosted infrastructure requires you to implement these access control mechanisms yourself.</p>