I set up a site in ISPCONFIG. When I hit it internally, i get the page to render correctly. When I hit it from outside my network (NAT'd), it renders an INDEX OF / page, and when I try to open the PHP files, it just shows the text of the PHP file. What did I configure incorrectly?
What's in Vhosts_ispconfig.conf, and what's the output of Code: ifconfig ? Did you try a domain/hostname to connect, or an IP address?