Apache at the same time as IIS 8.5 - how?

Question

Apache HTTP Server

Good afternoon.
There is VDS, it has Windows server 2008 and IIS 8.5.
A lot of asp projects are currently running on it.
It is necessary to transfer the project to Joomla on this server.
Joomla itself is installed and launched, but humanoid urls do not work.
Web.config was touched, urlrewrite too.
We decided to take radical steps: install Apache in parallel with IIS and start Joomla on it.
But then the question arose: will there be conflicts?
Apparently the Apache too will want to itself the 80th port.
How to proceed? Is there a way to isolate Apache from iis on one server, so that iis continues to work as it works, and changes are made exclusively to the apache config. Or maybe solve the problem without installing Apache?
It is impossible to break IIS in any case.

Answer 1

If there is only one IP on the server, then you can hang Apache on a different port, and use IIS to forward the necessary requests to Apache. Or vice versa. Or put IIS and Apache on other ports, and hang Nginx on 80 and let it figure out to whom what requests to send. There are no other options.
If there are several IPs, then just hang up IIS and Apache on different IPs.

Answer 2

put Apache on a different port, and put nginx in the frontend and redistribute hosts in it. It would be better to buy another VDS with linux.