icm/server_port_<xx> 
This parameter specifies the Web dispatcher server port or service (PORT) to use for a protocol (PROT).
Further properties of the service can also be defined, such as:
TIMEOUT and PROCTIMEOUT options
EXTBIND: Use external binding program
HOST: Do not bind the port to all host names
SSLCONFIG: SSL configuration
VCLIENT: Provide a X.509 certificate
ACLFILE: Use access control lists
Since the configuration of the parameter is dependent on the system type (AS ABAP, AS JAVA, Web dispatcher), the parameter cannot be executed further at this point.
To find more information about the parameter, go to this point in the documentation.
AS ABAP:
AS JAVA:
Web Dispatcher