I have a Mac Pro running 10.12.6 with apache serving a web site. When the system Firewall is turned on, the web page can't be accessed remotely, it times out. Strangely, it used to work with the Firewall on, but after the latest reboot, it doesn't anymore.
I've added httpd to the list of "Allow incoming connections" but it still doesn't allow access.
I'm overlooking something fundamental here...