Networking
How my OpenVPN fallback on TCP 443 is configured, why tls-crypt made it stop answering scanners, how I build client profiles, and the steps for adding and revoking a client.
Security
Building a new certificate authority for my OpenVPN fallback with easy-rsa, choosing validity periods, staging the files with strict permissions, and replacing 150 lines of inlined certificates with five directives.
Security
Adding one phone to my OpenVPN fallback revealed that the private key of the old certificate authority no longer existed anywhere. How I searched for it, and the 30-second check that proves whether a certificate and a key belong together.