OpenProject - custom port

I’ve publish OpenProject 7.1 by UCS on my internal server but i’d like to enable connection from outside my network
I cannot use ports 80,443 because others host using…
How can i change setting about web server hosting OpenProject in UCS ?

Thanks for help


easiast way would be nat on firewall
for example 8443 external port to openproject 443 internal
or use a web proxy to proxy the openproject site