A solution that uses apache and IIS to share port 80

Set apache to port 80, IIS to use other ports, such as 81, and then use apache as the proxy of IIS.
In httpd. conf, uncomment the following four lines:
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_connect_module modules/mod_proxy_connect.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule proxy_ftp_module modules/mod_proxy_ftp.so

Create a VM to redirect all access requests from the domain name to port 81.

<VirtualHost *: 80> ServerName iloves.vicp.net ProxyPass/http: // localhost: 81/ ProxyPassReverse/http: // localhost: 81/ </VirtualHost>

In this way, you can use both apache and IIS functions by using only one port.