Internet Direct (Indy) Version 9.0.1 Beta
TIdTCPClient.BoundPort
Indicates the preferred port number for the local connection.

property BoundPort: Integer;
Description
BoundPort is an Integer property that specifies the local port number to be used for the client connection. BoundPort is used in Connect to indicate the preferred port number for the IOHandlerSocket.ConnectClient method. BoundPortMin and BoundPortMax indicate the range of port numbers available for selection when BoundPort contains the default value BoundPortDefault.