Apache port question

[Gerry Doris]

I'm confused about apache ports.  For instance, if I wanted to connect
to webmin with SSL enabled then I am supposed to use the following:

https://webmin_server:10000

What exactly does this mean?  I thought that https automatically used
port 443.  If that's correct then how does apache end up using port
10000?

Also, what ports would need to be open for this to work through a
firewall...both 443 and 10000?

-- 
Gerry Doris <gdoris at rogers.com>