Can Minepeon listen on a different port instead of :443 or :80 ? Can it be set up to first request credentials BEFORE it displays the MINEPEON splash page? We don't want any intruders knowing what they've come across do we?

You can change the port like this:
sudo nano /etc/httpd/conf/httpd.conf
It's a line that says: "Listen 80", change it and then restart apache:
sudo systemctl restart httpd
Remove index.html and the splash page won't show :-)