WebSockets are internally available starting with Web Dispatcher 7.40.
It is recommended to use a recent Patch Level because the support is continuously improved.
Starting with 7.40 SP 5 WebSockets are enabled by default.
Prior to 7.40 SP5 the profile pameters described above were required.
Example:
icm/server_port_101 = PROT=WEBSOCKET,PORT=0,TIMEOUT=-1
icm/server_port_102 = PROT=WEBSOCKETS,PORT=0,TIMEOUT=-1
assuming that 101 and 102 are not already taken by other server_ports.
Port number is always 0. Timeout is always -1.
See also documentation.