Helix Core Server Administrator Guide: Fundamentals (2019.1)

Server and client setup

By default, a P4PORT setting that does not specify a protocol is assumed to be in plaintext. It is good practice to configure Helix server applications to explicitly specify the protocol, either tcp:host:port for plaintext, or ssl:host:port for encrypted connections.

The first time a user connects to an SSL-enabled server, their Helix server applications will inform them of the fingerprint of the server’s key.

If the user can independently verify that the fingerprint is accurate, they should add the server to their P4TRUST file (either by using the p4 trust command, by following the prompts in P4V or other Helix server applications, or by manually adding the fingerprint to the file).