Using Apache2.4.33, I was able to allow access to another computer on the network on port 80, however I can't seem to work out how to do the same with port 443 for a secure connection.
My httpd-vhosts.conf file: (if relevant)
# Virtual Hosts
#
<VirtualHost *:80>
ServerName localhost
ServerAlias localhost
DocumentRoot "${INSTALL_DIR}/www"
<Directory "${INSTALL_DIR}/www/">
Options +Indexes +Includes +FollowSymLinks +MultiViews
AllowOverride All
Allow from all
Require all granted
</Directory>
</VirtualHost>
Port 443 works perfectly on the computer I am hosting it on.