How to: Server started with `--insecure` still has `Failed to handshake`
If the client binary was generated with the `link` command this client has the server public key fingerprint baked in by default. If you lose your server private key, the clients will no longer be able to connect.
You can also generate clients with `link --fingerprint
` to specify a fingerprint, there isnt currently a way to disable this as per version 1.0.13.