In ecflow 4.0 we had an option for SSL support. However this was a compile time decision.
It meant that the GUI could not look at SSL and non-SSL servers at the same time.
In ecflow 5.0.1 the default is to allow both to be used providing the openssl libraries were found.
Use ECF_SSL environment variable to enable encrypted communication
export ECF_SSL=1 ecflow_client --stats ecflow_server
Use --ssl to enable encrypted communication
ecflow_client --ssl --stats ecflow_server --ssl