Hello Legwhite!
For WebUI Access you can connect via HTTP on TCP ports 80 and 8888, or via HTTPS on TCP ports 443 and 4343.
A quick way to validate that you've enabled HTTPS is with the command:
show web-server profile
You can configure these options via CLI with commands in the 'configure terminal' -> 'web-server profile' context, allowing you to change authentication types, SSL/TLS protocols, and more.
Hope this helps!