Port is a published Integer property in TIdEcho. Port represents the port number used by the ECHO protocol, and the port where the server in HOst listens for client connections and transmissions. 

Port is assigned the default port number for the Echo protocol (IdPORT_ECHO). The default value for Port is assigned during initailization of the component. 

Set values in the Host and Port properties prior to calling Connect.

IdPORT_ECHO Host