Helix Core Server User Guide (2019.2)

Connecting to services that require plaintext connections

If your Helix server installation requires plaintext (in order to support older Helix server applications), set P4PORT to tcp:hostname:port. If you attempt to use SSL to connect to a service that expects plaintext connections, the following error message is displayed:

Perforce client error:
    SSL connect to ssl:_host_:_port_ failed (Connection reset by peer).
    Remove SSL protocol prefix from P4PORT.

Set P4PORT to tcp:hostname:port (or, if you are using applications at release 2011.1 or earlier, set P4PORT to hostname:port), and attempt to reconnect to the service.