HI Ieroyong,
You need to understand how Symantec Streaming Servers works.
Front-end Server has two components:
1 - Launch Server
2 - Streaming Server
Launch Server is the portal that shows client packages and is client side portal.
It uses port 80
You can configure port 443 for SSL for launch server
Streaming server creates the streaming blocks of the applications and it delivers those blocks on the port 9823
you can not change this port 9823 to 443.